TPS65982 Designs for Supporting Voltages in USB-PD 'Power Rules' · 2016. 6. 6. · 3.1 PD 2.0...

1SLVA782–June 2016Submit Documentation Feedback

Copyright © 2016, Texas Instruments Incorporated

TPS65982 Designs for Supporting Voltages in USB-PD "Power Rules"

NexFET is a trademark of Texas Instruments.USB Type-C is a registered trademark of Universal Serial Bus Consortium.

Application ReportSLVA782–June 2016

TPS65982 Designs for Supporting Voltages in USB-PD"Power Rules"

ABSTRACTThe TPS65982 is a stand-alone USB Type-C® and Power Delivery (PD) controller providing cable plugand orientation detection at the USB Type-C connector. The latest revision of the USB Power Deliveryspecification outlines a new set of “Power Rules” requiring the following voltages to be sourced by acompliant product: 5, 9, 15, and 20 Volts. Existing reference designs of the TPS65982 followed the “PowerProfiles” put forth in the original USB PD specification. In USB PD releases up to Revision 2.0, Version 1.1the required voltages were limited to 5, 12, and 20 Volts. In order to comply with the new standard andkeep design effort simple, this application report outlines a few options for a new power circuit to meet thenew USB PD “Power Rules”. Although more than one power circuit will work, the simplest and most cost-effective solution is explained in detail with an example block diagram and schematic provided to use as areference for Type-C and PD applications.

Contents1 Introduction ................................................................................................................... 22 Related Material.............................................................................................................. 23 Background of Power for USB PD as a Source ......................................................................... 2

3.1 PD 2.0 Version 1.1 Specification Source “Power Profiles” .................................................... 23.2 PD 2.0 Version 1.2 Specification Source "Power Rules” ...................................................... 23.3 TPS65982-EVM, an Ideal PD 2.0 Power Source............................................................... 33.4 Sourcing "Power Rules" Voltage Rails to VBUS With the TPS65982 ....................................... 33.5 Dual-Role Port (DRP) Delivering 4+ Voltage Rails............................................................. 7

4 TPS65982+LM3489 Variable DC-DC Converter for "Power Rules" Voltages ....................................... 85 Summary .................................................................................................................... 116 References .................................................................................................................. 11

List of Figures

1 TPS65982-EVM Power Path Block Diagram ............................................................................ 32 Discrete GPIO Events Named “Source PDO # Negotiated” .......................................................... 43 GPIO Events Named “Source PDO Negotiated Truth Table, Bit #” .................................................. 44 Power Multiplexer Block .................................................................................................... 55 Power Multiplexer and TPS65982 Block Diagram ...................................................................... 56 Variable DC-DC Converter Block.......................................................................................... 67 Variable DC-DC and TPS65982 Block Diagram......................................................................... 68 TPS54335A Variable DC-DC Circuit for 9-V and 15-V Output Voltages ............................................ 79 Block Diagram of TPS65982+LM3489 Variable DC-DC Design ...................................................... 810 Power Path Schematic of TPS65982+LM3489 Variable DC-DC Design ( of 2) ............................ 911 Type-C and Power Delivery Schematic of TPS65982+LM3489 Variable DC-DC Design (Page 2 of 2) ....... 10

http://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=SLVA782

Introduction www.ti.com

2 SLVA782–June 2016Submit Documentation Feedback



1 IntroductionThe goal of this application report is to explain the changes in standard voltages of the new USB PowerDelivery (PD) Specification, compare the original and new standards, outline the power circuit used tomeet the original standard, and offer a new power circuit as a solution to comply with the new standardusing the TPS65982.

2 Related MaterialThe TPS65982 data sheet (SLVSD02), the USB Power Delivery Specification Revision 2.0, Version 1.2,the TPS65982 Evaluation Module user’s guide (SLVUAF8), the TPS6598X-CONFIG Configuration Tool,the TPS54335A data sheet (SLVSCD5), and the LM3489 data sheet (SNVS443) are resources used asreference material for this application report.

Although this application report is written specifically for the TPS65982 as an example, it also applies tothe TPS65986 and TPS65981.

3 Background of Power for USB PD as a Source

3.1 PD 2.0 Version 1.1 Specification Source “Power Profiles”In the USB Power Delivery Specification Revision 2.0 (PD 2.0), Version 1.1 released on May 7th, 2015,voltages for power delivery (PD) sources were defined in a set of “Power Profiles”.

Profiles are numbered 0–5, with profile #5 delivering all voltage and current options of the previous 4profiles. Profile #5 = 5 V at 2.0 A, 12 V and 20 V at 5 A. Variations on current capabilities are allowed, butrequired PDO object voltages are fixed at 3 values: 5, 12, and 20 Volts.

3.2 PD 2.0 Version 1.2 Specification Source "Power Rules”In the USB Power Delivery Specification Revision 2.0 (PD 2.0), Version 1.2, voltages for a PD Sourceare defined in a set of “Power Rules.” These “Power Rules” are also retroactively applied to the USBPower Delivery Specification Revision 2.0, Version 1.2 released on March 25th, 2016 and will also beincluded in the PD 3.0 Specification. The new “Power Rules” follow a mathematical equation outside thescope of this document, but in the new “Power Rules” there are 4 source voltages required to cover theentire range of PD power up to 100 Watts: 5, 9, 15, and 20 Volts.

http://www.ti.com


http://www.ti.com/lit/pdf/SLVSD02

http://www.ti.com/lit/pdf/SLVUAF8

http://www.ti.com/tool/tps6598x-config

http://www.ti.com/lit/pdf/SLVSCD5

http://www.ti.com/lit/pdf/SNVS443

External FET Sense and CTRL

USBType-C

Connector

Host

SE

LE

N

AM Mux Ctrl

TPS65982

PO

LD±

D±SBU1/2

CC/VCONN

VBUS

GND

CC1/2

USB_TP/TN

USB_BP/BNSBU1/2

3 A 3 A

To SS Mux

VIN_3V3

5 A

PP_5V0

2Type-C Cable Detection and

USB PD Controller

222

USB 2.0 andSideband-Use

Data

HighSpeedMux

HostInterface

TPS54335A

VOUT = 12 V

IOUT = 100 mAí5 A

VIN = 19.5í22 V

VOUT = 5 V

IOUT = 600 mAí3.5 A

Fixed DC-DC

VB

US

CC

1/C

C2

D+

/D-

SB

U1

/2S

S T

X/R

X

GND

VOUT = 3.3 V

IOUT = 500 mA

GP

IOx

GP

IOy

LED Control

GP

IOz

To LED Drivers

J1

PP_HV

PP_CABLE

J5

20-0000016-01Lintes Type-C Receptacle

(I2C, SPI)

VEXT = 20 V Typ. (19.5í22 V)

IEXT = 5 A (100 W Typ.)

DC Barrel Jack Input

TPS54335AFixed DC-DC

TPS54335AFixed DC-DC

www.ti.com Background of Power for USB PD as a Source




3.3 TPS65982-EVM, an Ideal PD 2.0 Power SourceThe TPS65982-EVM uses firmware (FW) that emulates a variety of products that are part of the USBType-C and PD ecosystem: dock, laptop, tablet, dongle, AC adapter, and high-power bus-powereddevices. These different configurations are selected by a set of DIP switches and will advertise differentsets of sink and Source Capabilities, but the hardware of the TPS65982-EVM remains the same. Whenconfiguration ID #7 is selected to emulate an AC adapter, the “Power Profile” of the TPS65982 offers 5 Vat 3 A, 12 V at 3 A, and 20 V at 5 A as its Source Capabilities. Figure 1 shows the power path of theTPS65982-EVM.

Figure 1. TPS65982-EVM Power Path Block Diagram

Attempting to deliver 9 V and 15 V instead of 12 V using the TPS65982 seems like a difficult problem tosolve, and the TPS65982-EVM cannot easily be modified to support this need. However, the embeddedprocessor inside the TPS65982 and many FW-configurable GPIOs make it simple to design a new circuitsupporting the four voltages required for the “Power Rules”.

3.4 Sourcing "Power Rules" Voltage Rails to VBUS With the TPS65982The voltages required by the new “Power Rules” are 5, 9, 15, and 20 Volts.

The Power Multiplexer and the Variable DC-DC converter are two different circuits that can solve thisproblem. Either of these two circuits may be preferred depending on the number of Type-C ports in asystem, the output wattage required, the available parts in a PCB library, and so forth. A combination ofthese two architectures may also be suitable for the needs of an application.

The TPS65982 PD policy engine automatically negotiates power contracts and alternate modes, thencontrols SuperSpeed multiplexers, LED indicators, and power circuitry using GPIOs linked to a set of pre-defined GPIO Events. These Events are easily mapped to any GPIO pin on the TPS65982 device tomatch the schematic of the application.

http://www.ti.com


http://www.ti.com/tool/tps65982-evm

Background of Power for USB PD as a Source www.ti.com




3.4.1 Source PDO GPIO Output Events in TPS65982 FWThe firmware (FW) of the TPS65982 allows any GPIO to be mapped to a pre-defined list of Events in theTPS6598X-CONFIG configuration tool. To prepare for the “Power Rules”, a set of 7 GPIO Events hasbeen set aside to control the voltage of external power circuitry. Each of these GPIO Events indicates thata Source PDO from the Source Capabilities list has been negotiated at the Type-C port.

The first 4 Events, called “Source PDO # Negotiated”, cause a single GPIO to be high when thecorresponding PD contract is negotiated. These GPIO Events are shown in Figure 2. For mostapplications, these discrete GPIO Events for up to 5 different voltage outputs (5 V is always providedthrough the PP_5V0 power path) are sufficient.

Figure 2. Discrete GPIO Events Named “Source PDO # Negotiated”

The last 3 Events, called “Source PDO Negotiated Truth Table, Bit #”, can be used to control a powercircuit with digital logic as an input, such as a digital power supply or the LM10011 Feedback SignalGenerator, to generate up to 8 different voltages from a single power supply. These GPIO Events areshown in Figure 3.

Figure 3. GPIO Events Named “Source PDO Negotiated Truth Table, Bit #”

Practical applications of the 4 “Source PDO # Negotiated” GPIO Events are discussed in the remainingsections of this application report.

http://www.ti.com



http://www.ti.com/product/LM10011


USBType-C

Connector

PD

O2

PD

O1

PDO3

PD

O3


Power Path Control

TPS65982

CC/VCONN

VBUS

GND

CC1

PP_5V0

PP_CABLE

PP_HV 3 A

3 A

500 mA

ToPFET

Driver Ckt

9-20V

15V

9V

+

5V

20V

5 A

BatteryCharger

PDO2

PDO1 V /CCCONNCC2

20V

to TPS6598X

PP_HV(or PP_EXT)

15V

9V

GPIOx

GPIOy

GPIOz





3.4.2 Power Multiplexer CircuitFigure 4 shows the power multiplexer block that can be inserted into the power circuit to switch betweenone of the three high-voltage rails before being connected to one of the high-voltage power FETs thatsource power to VBUS. The switches in this multiplexer are automatically controlled by GPIO Outputsfrom the TPS65982 with a simple driver circuit.

Figure 4. Power Multiplexer Block

Figure 5 shows the power multiplexer block connected to the TPS65982 in a simple dual-role port (DRP)block diagram. This circuit does not reduce the number of DC-DC converters in a 1 Type-C port design,but when 2 Type-C ports are used, each voltage rail can be delivered to both ports. As a result, the totalnumber of DC-DC buck converters used in the Power Multiplexer circuit is the same as in the VariableDC-DC circuit for an application with 2 Type-C ports. The Power Multiplexer circuit will not be describedin detail for two reasons:• Simplicity – Although additional PFETs are needed, driving these switches does not require a

complex circuit and follows the same logic as the non-obvious circuit used in the Variable DC-DCdesign.

• Cost – In many Type-C and PD applications, only 1 port will be required and the cost of the overallcircuit is reduced by using the Variable DC-DC design.

Figure 5. Power Multiplexer and TPS65982 Block Diagram

http://www.ti.com


REF2,9V 1

OUT,1 REF

V 0.8 VR R 100 k 9.75 k

V V (9 V 0.8 V)= ´ = ´ W = W

- -

REF2 1

OUT REF

V 0.8 VR R 100 k 7.14 k

V V (12V 0.8 V)= ´ = ´ W = W

- -

USBType-C

Connector

PD

O2


Power Path Control

TPS65982

CC/VCONN

VBUS

GND

CC1

PP_5V0

PP_CABLE

PP_HV 3 A

3 A

500 mA

5V

5 A

V /CCCONNCC2

VariableDC/DC

Converter

20V

PDO2

VOUT =9, 15V

VariableDC/DC

Converter

VIN

to TPS6598X

VOUT =9, 15, 20V

GP

IOx

GP

IOy

GP

IOz

Background of Power for USB PD as a Source www.ti.com




3.4.3 Variable DC-DC Converter CircuitFigure 6 shows the variable DC-DC converter block that can be inserted into the power circuit todynamically change the voltage on the VOUT node of the DC-DC converter before being connected to theTPS65982. The voltage of this DC-DC converter is automatically controlled by GPIO Outputs from theTPS65982 with a simple resistive network.

Figure 6. Variable DC-DC Converter Block

Figure 7 shows the Variable DC-DC converter block diagram connected to the TPS65982 in a simplesource-only design such as a dock or monitor. In this type of application, the highest voltage availablefrom a DC barrel jack is normally 20 V and can be passed directly to VBUS through the low-resistancePP_EXT external power NFETs.

Figure 7. Variable DC-DC and TPS65982 Block Diagram

Any DC-DC converter circuit producing a fixed output voltage can be turned into a Variable DC-DCconverter. All DC-DC converters use the basic principle of voltage feedback to determine the outputvoltage of the power circuit. For example, the TPS54335A used in the TPS65982-EVM design delivers afixed output voltage, VOUT = 12 V, by solving Equation 1 for R2 if R1 is given. VSENSE is the feedbackpin of the TPS54335A, which in steady-state settles at a fixed voltage of VSENSE = VREF = 0.8 V. Usingthe TPS65982-EVM as a reference, R1 = R102 = 100 kΩ, and Equation 1 is used to solve for R2.

(1)

Since a resistance of 7.14 kΩ is not a standard value for resistors, the closest value is used in theTSP65982-EVM where R2 = R104 = 7.15 kΩ.

In order to turn the TPS54335A into a variable DC-DC converter to provide multiple output voltages, theequation is solved for R2 twice, once for a 9-V output voltage in Equation 2 and again for 15 V inEquation 3.

(2)

http://www.ti.com


http://www.ti.com/product/TPS54335A

0.1µFC48

0.1µF

C42

100kR102

0.1µFC45

DNPC52

DNPR101

DNPR103 GND

GND

GNDGND

GND 22µFC46

22µFC47

GND

47.5kR109

9.53kR108

91pFC50

1800pFC51

External Power

VSENSE

VSENSE

10uH

L4VIN

1

VSENSE6

EN8

RT10

GND3

COMP7

PH2

BOOT9

PAD11

GND4

GND5

U7

TPS54335ADRCR

22µFC44

383R45

A2

A1

B1

B2

Q8

100k

R55

13.32kR90

Default: 9V

GND

9.53kR104

PLUG_EVENT1000pFC53

GPIO0

GPIO6

A2

A1

B1

B2

Q11

21 Red

D7LED will indicate that the DCDC is activeand provide a minimum 50mA load forDCDC and discharging PPHV/EXT whenchanging PD contracts

~40ms to discharge from 20V to 5V

0.1µFC49

HV_Source

PD Contract: 15V


2,9 V 2,15 V

2 A2,9 V 2,15 V

R R 9.75 k 5.73 kR 15.32 k

R R 9.75 k 5.73 k

´ W ´ W= = = W

- W - W

2,9 V 2 A

2,15 V2,9 V 2 A

R RR

R R

´

=

+

REF2,15V 1

OUT,2 REF

V 0.8 VR R 100 k 5.63 k

V V (15 V 0.8 V)= ´ = ´ W = W

- -





(3)

The easiest way to realize this circuit is to keep the existing feedback circuit with R1 and the new R2,9V asthe default option and add another resistor in parallel with R2,9V that can be switched into the circuit when aGPIO is driven high. This resistor will be called R2A, where R2,9V // R2A = R2,15V. Equation 4 shows that R2,15Vis equivalent resistance of R2,9V in parallel with R2A, but the equation needs to solve for R2A because R2,15Vis already known. Equation 5 solves for R2A.

(4)

(5)

Figure 8 shows the circuit for using the TPS54335A as a variable DC-DC converter to deliver 9 V or 15 Vdepending on the USB PD contract negotiated as a PD Source. The GPIOs are automatically driven bythe TPS65982 when the FW is configured properly in the TPS6598X-CONFIG Configuration tool. Bydefault, 9 V is generated by R102 and R104, where R1 = R102 and R2,9V = R104 in the default feedbackvoltage divider in Equation 2. When a 15-V PD contract is negotiated, GPIO0 is driven high by theTPS65982 (not shown in this schematic), putting R90 in parallel with R104. The on-resistance of Q8 isnegligible compared to 13.32 kΩ, so the output of 15 V is generated by R102 and R104 // R90 where R1 =R102 and R2,15V = R2,9V // R2A = R104 // R90 = in Equation 4 and Equation 5.

Figure 8. TPS54335A Variable DC-DC Circuit for 9-V and 15-V Output Voltages

3.5 Dual-Role Port (DRP) Delivering 4+ Voltage RailsThe Power Multiplexer and the Variable DC-DC Converter discussed in the previous section will bothwork in many USB Type-C and PD applications, but the Variable DC-DC has advantages in a system withonly 1 Type-C port because less DC-DC buck converters are used and the overall component count isreduced significantly.

The Variable DC-DC buck converter can theoretically support as many different voltages as needed bythe application, so a DRP that needs to sink power on the PP_EXT FET path of the TPS65982 should beable to deliver 9 V, 15 V, and 20 V through the PP_HV FET path as a Source. Some applications will alsoneed to provide 12 Volts to support legacy USB PD devices that only accept a 12-V PD Contract.

The problem with a USB PD DRP that needs to provide 9 V, 12 V, 15 V, and 20 V from a single DC-DCconverter is that the DC barrel jack voltage is exactly 20 V and most DC-DC buck converters cannotsupport 100% Duty Cycle operation.

The next section explains in detail how that problem is solved and presents a design that will source thenew voltages to comply with the “Power Rules” of the latest USB PD Specification.

http://www.ti.com



HostS

EL

EN

AM Mux Ctrl

TPS65982

PO

L

D±

D±SBU1/2

CC/VCONN

VBUS

GND

CC1/2

USB_TP/TN

USB_BP/BNSBU1/2

3 A 3 A

To SS Mux

VIN_3V3

5 A

PP_5V0

2Type-C Cable Detection and

USB PD Controller

222

USB 2.0 andSideband-Use

Data

HighSpeedMux

HostInterface

TPS54335A

TPS54335A

VOUT = 5, 9, 12, 15, 20 V

IOUT = 100 mAí5 A

VIN = 19.5í21 V

VOUT = 5 V

IOUT = 600 mAí3.5 A

VIN = 9í21 V

Fixed DC-DC

Fixed DC-DC

VOUT = 3.3 V

IOUT = 500 mA

VIN = 9í21 V

PD

O1

PD

O2

Voltage SelectP

DO

3

To Var DC-DC

PD

O0

GP

IOx

GP

IOy

LED Control

GP

IOz

To LED Drivers

LM3489Variable DC-DC

PD

O1

PD

O2

PD

O3

PD

O0

PP_HV

PP_CABLE

GND

J5

J6

(I2C, SPI)

VEXT = 20 V Typ. (19.5í22 V)

IEXT = 5 A (100 W Typ.)

DC Barrel Jack Input

USBType-C

Connector

VB

US

CC

1/C

C2

D+

/D-

SB

U1

/2S

S T

X/R

X

GND

J1

20-0000016-01Lintes Type-C Receptacle

TPS65982+LM3489 Variable DC-DC Converter for "Power Rules" Voltages www.ti.com




4 TPS65982+LM3489 Variable DC-DC Converter for "Power Rules" VoltagesThe block diagram in Figure 9 shows the TPS65982 controlling the LM3489 as a Variable DC-DC buckconverter to deliver 9, 12, 15, and 20 Volts through either the PP_HV internal high voltage path or thePP_EXT external high voltage path, while the path not used as a PD Source is used to sink power fromVBUS. As a result, this design can be used as a DRP that is capable of being line-powered from a barreljack or bus-powered over Type-C.

Figure 9. Block Diagram of TPS65982+LM3489 Variable DC-DC Design

The schematics for this design are shown in Figure 10 and Figure 11, where Figure 10 shows the powerpath containing the LM3489 and Figure 11 shows the Type-C connector and TPS65982 PD controller.GPIOs 0–3 are outputs from the TPS65982 that switch in the correct resistor in the LM3489 circuit todeliver the appropriate voltage when a Source PDO contract is negotiated. The LM3489 can achieve100% duty cycle because it is a Hysteretic PFET type of DC-DC buck controller, meaning that when 20 Vis required, the PFET is driven on 100% of the time and is effectively a switch that is closed.

GPIO6 is also an output from the TPS65982 that is used to drive the EN pin of the LM3489 high onlywhen a Type-C connection is present. GPIO6 simultaneously turns on LED D7, which is used to “bleed”the voltage from a higher voltage to a lower voltage when necessary. For example, the system may bedelivering 20 V to a laptop which is removed and quickly replaced with a tablet that only needs 9 V tocharge its battery. The TPS65982 automatically discharges VBUS to meet the USB PD specification, but ifLED D7 were not present, the PP_HV (or PP_EXT) node would be stuck at 20 V until it dischargesnaturally. This natural discharge could take seconds to minutes when an un-plug and re-plug event at theType-C port could happen in as little as 1 second.

Certain DC-DC converter ICs can perform this “voltage bleed” automatically, and this feature is referred toas “output discharge” or forced continuous conduction mode (FCCM). For more details on FCCM as a wayto remove LED D7 and save power, refer to the TPS53353 data sheet. The original high voltageNexFETsTM used in the TPS65982-EVM have been replaced with CSD87501L (Q1 in Figure 11), a singleback-to-back N-channel NexFET™ IC in a small WCSP package. The additional passive circuitry andconnectors in Figure 10 and Figure 11 not discussed in this application report are the same as theTPS65982-EVM.

http://www.ti.com



http://www.ti.com/product/TPS53353

http://www.ti.com/product/CSD87501L

0.1µFC26

0.1µF

C20

100kR82

0.1µFC23

DNPC27

DNPC30

DNPR81

DNPR83 GND

GND

GNDGND

GND

GND

0.1µFC37

0.1µF

C31

100kR92

19.1kR94

0.1µFC34

DNPC38

DNPC41

DNPR93 GND

GND

GNDGND

GND

GND

GND

GND

22µFC35

22µFC36

22µFC24

22µFC25

32.4kR84

SENSE1

GND4

POWER2

POWER3

GND5

SHIELD6

SHIELD7

SHIELD8

SHIELD9

J4

JPD1135-509-7F

VBarrel

GND

S3

1.00k

R27System_RESET

DNPR91

J9

47.5kR97

8.45kR95

100pFC39

2200pFC40

330pFC28

5600pFC29

2.74kR85

47.5kR88

System_3V3

System_5V

VBarrel

VBarrel

System_3V3

5V_VSENSE

5V_VSENSE

3V3_VSENSE

3V3_VSENSE

GND10uH

L3

10uH

L2

VIN1

VSENSE6

EN8

RT10

GND3

COMP7

PH2

BOOT9

PAD11

GND4

GND5

U6

TPS54335ADRCR

VIN1

VSENSE6

EN8

RT10

GND3

COMP7

PH2

BOOT9

PAD11

GND4

GND5

U5

TPS54335ADRCR GND

D10

22µFC22

22µFC33

30kR43

100k

R49 383R45

21 Red

D7

22µFC42

22µFC43

1000pFC45

GND

8.2kR42

0.1µFC44

GND

GND

A2

A1

B1

B2

Q8

A2

A1

B1

B2

Q9

A2

A1

B1

B2

Q10

100k

R55

100k

R87

100k

R89

2.20kR98

3.74kR96

9.31kR90

Plug Event resistance is always on for 5V and 5V PD ContractPlug Event Resistance & PDIOx resistance will be the equivalent resistance needed for Vfb

5V: 9.53k9V: 4.7k15V: 2.67k20V: 1.78k (Force 100% Duty Cycle)

Bottom Resistance Needed

Plug Event and ONLY ONE PDIOx are on for other PD contracts

PD Contract: 9V PD Contract: 15V PD Contract: 20VPD Contract: 5V

DCDC is disabled whenthere is no connection present

100µFC32

GND

LED will indicate that the DCDC is activeand provide a minimum 50mA load forDCDC and discharging PPHV/EXT whenchanging PD contracts

Output capacitors must be rated toat least 25V and have ESR in 100s of mOhms

When in 100% Duty Cycle (20V) the dropof the PFET and Inductor must be takeninto account. PP_EXT is recommended.

*The FB is set slightly higher for Vdrop*

~40ms to discharge from 20V to 5V

GND

GND

9.53kR52

PLUG_EVENT

VIN8

ADJ5

PGND6

GND2

ISEN1

PGATE7

EN3

FB4

U7

LM3489QMM/NOPB

270

R44

10µH

L4

D6PMEG3050EP,115

1000pFC46

VBarrel

GPIO0 GPIO2 GPIO3

PP_HV

PP_EXT

A2

A1

B1

B2

Q12

100k

R106

PD Contract: 12VGPIO1

5.36kR107

TP8 TP9 TP10TP11

GND

Labeled as GND

TP12

TP7

TP6

GPIO6

GPIO7DNPR170R16

Use R16 or R17 exclusive of each other

Place one of these next to the I2C

GPIO6

PLUG_EVENT

VAR_DCDC

A2

A1

B1

B2

Q11

100uFC47

GND

1

2

3

J9

61300311121

TP5

4

1

2

3Q7

SI8409DB-T1-E1


www.ti.com TPS65982+LM3489 Variable DC-DC Converter for "Power Rules" Voltages




Figure 10. Power Path Schematic of TPS65982+LM3489 Variable DC-DC Design (Page 1 of 2)

http://www.ti.com


GND GND

GNDGND

GND

D1

21 ohm

L1

0.01R1

GND

GND

GND

0R3

0R5

GND

1µFC6

10µFC1

VBUS

DNPR10

0R22

DNPR11

0R30

GND

0.01µFC7

0.01µFC8

0.01µFC9

0.01µFC10

D1+1

D1-2

NC6

NC7

NC9

NC10

D2+4

D2-5

GND3

GND8

U3

TPD4E05U06DQA

D1+1

D1-2

NC6

NC7

NC9

NC10

D2+4

D2-5

GND3

GND8

U4

TPD4E05U06DQA

0.22µFC3

3.83kR753.83kR76

3.83kR79

100kR26

0.01µFC53

GND

1.00kR121.00kR131.00kR141.00kR15

15.0kR28

White

12

D3

560R73

White

12

D4

560R74

White

12

D5

560R86

White

12

D2

560R72

GND

0R56

System_RESET

10µFC14

1µFC16

1µFC17

GND

1µFC13

System_3V3

LDO_3V3

GNDGND

GND

0.1µFC12

22µFC11

System_5V

GND

0.1µFC5

10µFC4

GND

PP_HV

1µFC18

PD & Alternate ModeConfiguration Switch

CC1/CC2 & SBU1/SBU2ESD Protection

USB2.0 Top/BottomESD Protection

30V Rated NFET Recommended

I2C Pull-Ups for I2C1 & I2C2

GND

GND

GNDGND

GND

GNDGND

9.09kR77

9.09kR78

3.83kR80

VOUT_3V3

LDO_1V8D

VBUS

VBUS

VBUS

VBUS

C_SBU_N

C_USB_B_N

C_USB_B_P

C_CC2C_SBU_P

C_USB_T_N

C_USB_T_P

C_CC1

LDO_3V3

I2C_SDA1

I2C_SDA2

I2C_SCL1

I2C_SCL2

I2C_IRQ1Z

I2C_IRQ2Z

C_SBU_N

C_USB_B_N

C_USB_B_P

C_CC2

C_SBU_P

C_USB_T_N

C_USB_T_P

C_CC1

C_USB_B_P

C_USB_B_N

C_USB_T_P

C_USB_T_N

C_CC2

C_CC1

C_SBU_N

C_SBU_P

GPIO0

C_CC2

C_CC1

C_USB_T_N

C_USB_T_P

C_USB_B_P

C_USB_B_N

C_SBU_N

C_SBU_P

MRESET

RESETZ

HV_GATE1

HV_GATE2

SENSEP

SENSEN

RPD_G2

RPD_G1

RPD_G1

RPD_G2

BUSPOWERZ

SENSEN

SENSEP

HV_GATE1 HV_GATE2

GPIO0

GPIO1

GPIO2

GPIO3

GPIO6

GPIO7

GPIO8

GPIO4_HPD

GPIO5_HPD

AUX_P

AUX_N

USB2_RP_P

USB2_RP_N

SPI_MOSI

SPI_MISO

SPI_CSZ

SPI_CLK

I2C_SDA1

I2C_SDA2

I2C_SCL1

I2C_SCL2

I2C_IRQ1Z

I2C_IRQ2ZGND

System_5V

CS1

DO/IO12

WP/IO23

GND4

DI/IO05

CLK6

HOLD/IO37

VCC8

U1

W25Q80DVSNIG

LDO_3V3

3.3kR4

3.3kR7

3.3kR9

SPI_MOSI

SPI_CLK

GND

SPI_MISO

LDO_3V3

SPI_CSZGND

0.1µF

C2

3.3kR8

SPI_SSZB3

SPI_MOSIB4

DEBUG_CTL2D5

UART_TXE2

DEBUG_CTL1E4

UART_RXF2

SWD_DATAF4

R_OSCG2

SWD_CLKG4

AUX_PJ1

AUX_NJ2

DEBUG2K2

DEBUG4K3

LSX_R2PL4

USB_RP_NK5

C_USB_TPK6

C_USB_BPK7

C_SBU1K8

RPD_G1K9

RPD_G2K10

DEBUG1L2

DEBUG3L3

LSX_P2RK4

USB_RP_PL5

C_USB_TNL6

C_USB_BNL7

C_SBU2L8

C_CC1L9

C_CC2L10

SPI_CLKA3

SPI_MISOA4

HV_GATE1B9

SENSEPB10

SSH7

HV_GATE2A9

SENSENA10

GPIO0B2

I2C_SCL2B5

I2C_IRQ2ZB6

I2C_IRQ1ZC1

GPIO1C2

GPIO4_HPDC10

I2C_SDA1D1

I2C_SCL1D2

GPIO7D7

GPIO2D10

GPIO5_HPDE10

MRESETE11

I2C_ADDRF1

RESETF11

GPIO6G10

GPIO3G11

GPIO8H6

NCL11

I2C_SDA2A5

RESETD6

U2A

TPS65982ABZQZR

GNDA1

PP_HVB7

GNDB8

PP_5V0B11

VDDIOB1

LDO_1V8DA2

PP_5V0C11

GNDD8

PP_5V0D11

LDO_BMCE1

GNDE5

GNDE6

GNDE7

GNDE8

GNDF5

GNDF6

GNDF7

GNDF8

BUSPOWERZF10

LDO_3V3G1

GNDG5

GNDG6

GNDG7

GNDG8

VIN_3V3H1

VOUT_3V3H2

GNDH4

GNDH5

GNDH8

PP_CABLEH10

VBUSH11

VBUSJ10

VBUSJ11

LDO_1V8AK1

VBUSK11

GNDL1

PP_HVA6

PP_HVA7

PP_HVA8

PP_5V0A11

U2B

TPS65982ABZQZR

150µFC21

GND

System_5V

330pFC19

330pFC15

GNDA1

TX1+A2

TX1-A3

VBUSA4

CC1A5

D+A6

D-A7

SBU1A8

VBUSA9

RX2-A10

RX2+A11

GNDA12

GNDB1

TX2+B2

TX2-B3

VBUSB4

CC2B5

D+B6

D-B7

SBU2B8

VBUSB9

RX1-B10

RX1+B11

GNDB12

H1H1

H2H2

H3H3

H4H4

H5H5

H6H6

11

22

33

J1

20-0000016-01

1

2

J6

ED120/2DSGND

Vbus_Sink

GPIO2 GPIO3GPIO1

1

2

3

4

5

6 7

8

9

10

11

12

S11.00kR991.00kR100

LDO_1V8D

LDO_3V3

BUSPOWERZ

GPIO0

GPIO1

GPIO2

GPIO3

A2

A1

B1

B2

Q3

A2

A1

B1

B2

Q4

A2

A1

B1

B2

Q5

A2

A1

B1

B2

Q6

Voltage LED Indicators

1 2

3 4

5 6

7 8

9 10

J10

5103308-1

I2C_SDA1

I2C_SCL1

SPI_MISO

SPI_CLK

SPI_CSZ

0R1100R111

DNPR108DNPR109

GND

I2C_SCL2

I2C_SDA2

0 R400 R690 R71

I2C_IRQ1Z

I2C_SDA1

I2C_SCL1

SPI_MOSI

Vbus_Sink

PP_HV

PP_EXT

1

2

3

J11

61300311121

1

2

3

J8

61300311121

1

J2

61300111121GND

TP4

TP3

TP1

TP2

A2A1

B2B1

C2

C1

D2D1

E2E1

Q1 CSD87501L

1.0MR211.0MR251.0MR291.0MR331.0MR101

100kR2

100kR6

100kR19

3.83kR18

LDO_3V3

GND


TPS65982+LM3489 Variable DC-DC Converter for "Power Rules" Voltages www.ti.com




Figure 11. Type-C and Power Delivery Schematic of TPS65982+LM3489 Variable DC-DC Design (Page 2 of 2)

http://www.ti.com


www.ti.com Summary




5 SummaryThis application report introduced the new voltages required by the “Power Rules” in the USB PD 2.0,Version 1.2 and PD 3.0 specifications, briefly discussed the numerous circuits that can be used to providethese voltages to VBUS as a PD Source, and selected the best option to use in a single Type-C portapplication with low cost as the primary goal.

Since the new design appears complex at first, a review of the voltage feedback principles of DC-DCcontroller ICs was needed to see that this solution is relatively simple to implement. Combining the GPIOOutput capabilities of the TSP65982 firmware and the ability of the LM3489 to deliver voltage at 100%duty cycle, a cost-competitive solution was designed and described in detail that will work in many Type-Cand PD Source, and DRP applications including notebooks, monitors, and docks.

6 References• TPS65982 data sheet (SLVSD02)• TPS65982 Evaluation Module user’s guide (SLVUAF8)• TPS6598X-CONFIG Configuration Tool• USB Power Delivery Specification• TPS54335A data sheet (SLVSCD5)• LM3489 data sheet (SNVS443)

http://www.ti.com


http://www.ti.com/lit/pdf/SLVSD02

http://www.ti.com/lit/pdf/SLVUAF8


http://www.usb.org/developers/docs/

http://www.ti.com/lit/pdf/SLVSCD5

http://www.ti.com/lit/pdf/SNVS443

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and otherchanges to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latestissue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current andcomplete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of salesupplied at the time of order acknowledgment.TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s termsand conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessaryto support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarilyperformed.TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products andapplications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provideadequate design and operating safeguards.TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, orother intellectual property right relating to any combination, machine, or process in which TI components or services are used. Informationpublished by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty orendorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of thethird party, or a license from TI under the patents or other intellectual property of TI.Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alterationand is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altereddocumentation. Information of third parties may be subject to additional restrictions.Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or servicevoids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.TI is not responsible or liable for any such statements.Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirementsconcerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or supportthat may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards whichanticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might causeharm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the useof any TI components in safety-critical applications.In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is tohelp enable customers to design and create their own end-product solutions that meet applicable functional safety standards andrequirements. Nonetheless, such components are subject to these terms.No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the partieshave executed a special agreement specifically governing such use.Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use inmilitary/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI componentswhich have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal andregulatory requirements in connection with such use.TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use ofnon-designated products, TI will not be responsible for any failure to meet ISO/TS16949.

Products ApplicationsAudio www.ti.com/audio Automotive and Transportation www.ti.com/automotiveAmplifiers amplifier.ti.com Communications and Telecom www.ti.com/communicationsData Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computersDLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-appsDSP dsp.ti.com Energy and Lighting www.ti.com/energyClocks and Timers www.ti.com/clocks Industrial www.ti.com/industrialInterface interface.ti.com Medical www.ti.com/medicalLogic logic.ti.com Security www.ti.com/securityPower Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defenseMicrocontrollers microcontroller.ti.com Video and Imaging www.ti.com/videoRFID www.ti-rfid.comOMAP Applications Processors www.ti.com/omap TI E2E Community e2e.ti.comWireless Connectivity www.ti.com/wirelessconnectivity

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2016, Texas Instruments Incorporated

http://www.ti.com/audio

http://www.ti.com/automotive

http://amplifier.ti.com

http://www.ti.com/communications

http://dataconverter.ti.com

http://www.ti.com/computers

http://www.dlp.com

http://www.ti.com/consumer-apps

http://dsp.ti.com

http://www.ti.com/energy

http://www.ti.com/clocks

http://www.ti.com/industrial

http://interface.ti.com

http://www.ti.com/medical

http://logic.ti.com

http://www.ti.com/security

http://power.ti.com

http://www.ti.com/space-avionics-defense

http://microcontroller.ti.com

http://www.ti.com/video

http://www.ti-rfid.com

http://www.ti.com/omap

http://e2e.ti.com

http://www.ti.com/wirelessconnectivity

TPS65982 Designs for Supporting Voltages in USB-PD 'Power Rules' · 2016. 6. 6. · 3.1 PD 2.0...

Documents

Transcript of TPS65982 Designs for Supporting Voltages in USB-PD 'Power Rules' · 2016. 6. 6. · 3.1 PD 2.0...