Welcome to the Texas Instruments New Product Update

We will begin promptly at 1 min past the hour- thank you for your patience

Phone lines will be muted during the presentation.

We’ve updated the Webex Audio and you can now get audio through the PC

or have Webex call your phone.

Please post questions on the chat Web-Ex Chat

or contact your sales person or field applications engineer

Play Recording

Active Power Factor Correction

AC/DC Hero Products

2

< 30 W < 75 W < 300 W < 600 W

Valley Switch Flyback

PSR: UCC28704

SSR: UCC28742

Volt-Sec Balance SR

UCC24636

Active Clamp Flyback

UCC28780

VDS Sense SR

UCC24612

Transition Mode PFC

UCC28056

LLC Resonant

UCC25640x

VDS Sense SR

UCC24624

Interleaved TM PFC

UCC28064A

LLC Resonant

UCC25640x

VDS Sense SR

UCC24624

No Power Factor Correction

D2

RCS

+

–DRV

CS

CDD

VDD

GND

RS1

RS2

VS

NP

NA

RSTR

VAUX

VAC

NTC/SU

RLC

UCC28704

SOT23-6

COUTVOUT

RPL

VBLK

CB1

-t° RNTC

NS

Q1

Q2

UCC24636

SOT23-6

DRV GND

EMI FilterFull Wave

Rectifier

Isolated

DC/DCEMI Filter

Isolated

DC/DC

Full Wave

Rectifier

Power

Factor

Correction

Aux-less supply Aux-less supply +2x power density Small, simple design

SR

Fly

bac

k DCM Flyback , Opto

SOT23-6

UCC2863x

PSR, X-Cap Discharge

SOIC-7

UCC24630

5-24V, SR

V-sec Control, CCM

SOT23-6

UCC24610

5V, SR

VDS Sense Control

SOIC-8, SON-8

UCC24636

5-24V, SR

V-sec Control, DCM

SOT23-6

UCC28600

5-24V, Vo SR

VDS Sense Control CCM/DCM

SOT23-6

1.5x power density SSR , Active Clamp Flyback, ZVS Flyback

SOIC-16 , QFN

UCC28740

High Power Flyback DCM Flyback, SSR DCM Flyback, PSR

LM5023

SSR QR, HV Start Up

VSSOP-8

SSR QR

SOIC-8

CV/CC with HV Start Up

SOIC-7

3

LM5021

SSR Fixed Fsw

MSOP-8

Volt-Sec Balancing VDS Sensing

UCC24612

UCC28780

UCC28742

High Efficiency Flyback

UCC2870x/1x UCC28730

UCC28704

FET Driver

Enhanced Features

SOT23-6

FET Driver

1x: SOIC-7, 0x: SOT-23 Zero Standby Power

SOIC-7

UCC28720/2

BJT Driver

0: SOIC-7, 2: SOT-23

Production

Sampling

New

AEC-Q100

Presentation

Focus

Flyback Portfolio

Capable of both full ZVS and partial ZVS detections for

primary switches using GaN and Si FETs

- Fast, self correcting ZVS tuning with dead time optimizer

Switching frequency up to 1MHz

Mix-mode control

- Adaptive Amplitude Modulation with variable switching

frequency control

- Programmable Light load Adaptive Burst Mode

Resistor programmability for power stage optimization

Internal soft start, open/short pin fault, and programmable

Output OVP, brownout protection, OCP, OPP and OTP

Secondary-side regulation for CV/CC operation

Dual purpose ZVS sensing and high voltage startup

Logic level outputs with enable

Package: SOIC-16 and 3x3mm QFN (0.50mm pitch)

High-density adapters and chargers

USB PD for cell phone, tablet, and notebook chargers

AC/DC or DC/DC auxiliary power supplies

ZVS eliminates switching losses for higher switching frequency

- Reduced generated EMI and transformer size

Mixed mode control maximizes performance

- Maintain ZVS over line, load and component tolerances

- Highest average efficiency for the entire line/load range

- Reduces output voltage ripple

- Eliminates risk of audible noise

External HV start up FET enables standby power below 75mW

Flexible to work with Si FET driver or GaN power stages

Accurate OPP reduces required oversize of power stage components

Satisfies DOE Level VI and CoC v5 tier 2 efficiency standards

UCC28780 | High Frequency Active Clamp Flyback

4

Applications

Features Benefits

SOIC-16

QFN-16 UCC24612

~

~

+–VAC

Driver

CC/CV

Compesator

UCC28780

VOUT

RU

N

PW

MH

PW

ML

VD

D

FB

SW

S

Vsw

HV

G

Vsw

CS

VDD

VS

GND

NTC

RDM

RTZ BUR

REF

SET

REF

HVsense

VOUT

www.ti.com/product/UCC28780

What is an Active Clamp Flyback?

5

Eliminates switching losses and reduces EMI

with proper control of the clamp which allows

zero voltage switching (ZVS) to be achieved

Improves efficiency over traditional Flyback

converters by recirculating the leakage energy

and delivering it to the output instead of

dissipating it

Enables greater power density Lower

switching losses and corresponding temperature

rise enables higher switching frequencies, which

allows for smaller passive components and

tighter packaging

Traditional

QR Flyback

Active Clamp

Flyback

More information

training.ti.com/what-active-clamp-flyback

6

Power Level (W)

Po

wer

den

sit

y (

W/in

3)

9 W/in3

15 W

10

20

Best OEM

devices

today

11 W/in3

65 W

7 W/in3

45 W

* Open frame power density

30

19 W/in3 *

27 W

21 W/in3 *

45 W

30W/in3 *

65 W

30W/in3 *

100 W

7.9W/in3

90 W

Quasi Resonant Flyback

Active Clamp Flyback

TI Active Clamp Flyback vs QR Flyback

ACF Kick Start Designs

7

Design Number Power

Level

Output

Voltage FET

Power

Density

Full Load

Efficiency

UCC28780EVM-002 45W 20V GaN 22 W/in3 115V: 94.6%

230V: 94.7%

UCC28780EVM-021 45W 20V Si 18 W/in3 115V: 94.1%

230V: 93.8%

TIDA-01622 65W USB PD

(5, 9, 15, 20V) GaN 30 W/in3 115V: 93.8%

230V: 94.0%

PMP21479 65W USB PD

(5, 9, 15, 20V) Si 18 W/in3 115V: 93.6%

230V: 93.2%

TIDA-01623 100W

(PFC)

USB PD

(5, 9, 15, 20V) GaN 30 W/in3 115V: 92.6%

230V: 93.4%

TIDA-010047 100W

(PFC)

USB PD

(5, 9, 15, 20V) Si 22 W/in3 115V: 92.0%

230V: 93.1%

Alternative High Efficiency Topologies

8

Quasi Resonant Flyback ZVS Flyback Active Clamp Flyback

Efficiency, Power Density

System Cost

ZVS Flyback Pros & Cons • PRO

– ZVS across wide range of line/load/Vout – SR builds up

required negative current

– Uses high-eff SR & sec winding to build up ZVS current

• No need for auxiliary ZVS FET/winding

– High fsw small size & moderate power density

– Simpler design vs ACF – closer to regular QR

• CON

– Leakage energy still dissipated in snubber or clamp

• But may not be significant with low leakage transformer

(<1% common in many commercial adapters)

– May need 650/700-V pri FET – trade-off with Nps & snubber

– Moderate increase in cost & parts count vs QR

• Needs isolated gate drive for SR

9

ZVS Flyback

PMP21552 ZVS Flyback Demo Board

10

Features:

• Universal AC input 85-265 VAC

• USB-C PD Output 5/9/15/20 V @ 3.25 A (up to 65 W)

• Open-frame 45 x 55 x 25 mm (62 cc)

• RM8 size transformer

• Main FET – Si Superjunction

• Conducted and Radiated EMI compliant

90VAC/50Hz Input, 20V/3.25A Output

www.ti.com/tool/PMP21552

PFC & LLC Portfolio

PF

C

Improved Light-Load

Efficiency

SOIC-16 UCC28063A

LL

C

UCC25630x

LLC + HV Driver

SOIC-14

Production

Sampling

UCC25600

LLC Resonant

SOIC-8

UCC28050/1

New

UCC28180 UCC28070A/-Q1

UCC25710

Constant Current Output

PWM Dimming Input

SOIC-20

1-Ph CCM 2-Ph CCM 1-Ph TM 2-Ph TM

6-pin, High Performance

CRM/DCM PFC Controller

SOT23-6

High UVLO Threshold

Variable Frequency

SOIC-8

Average Current Mode

SOIC-20 , TSSOP-20

Improved Audible Noise

Immunity

SOIC-16

8-pin, Higher UVLO, OVP

SOIC-8 , PDIP-8

11

UCC28056

UCC256402/3/4

LLC + HV Driver

Improved light load mode

SOIC-14

UCC28064A

6-pin, CRM/DCM PFC Controller

Improved noise immunity

SOT23-6

UCC28056A/B/C UCC28065

High Frequency Operation

up to 800kHz

SOIC-16

AEC-Q100

Presentation

Focus

SR

5-24V, Vo Dual SR

VDS Sense Control

SOIC-8

UCC24624

X-cap

discharge

controller

Remove x-cap discharge circuitry (optional)

Remove auxiliary flyback bias supply due to

light load mode and integrated HV startup

System Advantages

AC

Input

Auxiliary Flyback

LLC

UCC25640x

SR

UCC24624

PFC

TM/CrM UCC28056

CCM UCC28180

Reduce output capacitance due to

improved transient response from hybrid

hysteretic control

Reduce EMI filter size from valley and soft

switching and LLC adaptive dead time

DC

Output EMI

Filter

13

Operation

Transition Mode

(TM, BCM, CrM)

Continuous

Conduction Mode

(CCM)

TM

UCC28056

Interleaved TM

UCC28064A

CCM

UCC28180

Interleaved CCM

UCC28070A

300 W 1 kW

Allows use of low

cost diode

CCM operation

reduces RMS

current thru inductor

Better PF/THD

than TM

Typical Power Level by Topology

PFC Operation

• Lighting

• DTV

• Computing supply and adapters

Applications

Benefits Features

• 6-pin TM PFC Controller with Valley Switching, unity

power factor and optimized THD

• Unified algorithm for working in CrM and DCM with High

power factor across the entire operating range

• No aux winding needed for ZCD

• <50mW no-load power consumption

• Fast, Enhanced Dynamic Response (non-linear control)

• Robust Protection:

• Fast response 2nd OVP on a dedicated Pin

• Soft-start and soft recovery after OVP

• Input voltage brown out detection

• Open-loop protection and under voltage protection

• Strong drive capability: 0.7A/1A source/sink

• Industry best light load efficiency with advanced light

load efficiency management

• Provides High Efficiency & Low THD with Fewest

External Components

• Superior No-Load and Light Load Efficiency

• Allows Fast Load Transient Response w/ Small Output

Cap

• No Inductor ZCD Winding Required Flexible Design

Options

• Full, Robust Protection (Same as 8-pin PFC ICs)

UCC28056x | CrM/DCM Mixed Mode PFC Controller

14

Remove auxiliary winding on inductor

UCC28056 Advantages

Reduce IC size by combining functionality to

single pin

Reduce loss from multi-mode CrM/DCM operation

with valley switching

8 Pin PFC

UCC28050/1

6 Pin PFC

UCC28056x

UCC28056 Variants

16

UCC28056 UCC28056A UCC28056B UCC28056C -A/-B/-C Advantage

Target

Application

Lighting

TV

Consumer AC/DC

Telecom 5G

Lighting

TV

PC Power

Industrial AC/DC

Consumer AC/DC

Telecom 5G

TV

PC Power

Industrial AC/DC

Consumer AC/DC

Telecom 5G

Target DC

Bus Voltage

High bus voltage

e.g. 415V

High bus voltage

e.g. 390V

High bus voltage

e.g. 390V

ZCD Noise

Sensitivity

Improvement

No Yes Yes Yes

Increases robustness by

eliminating potential for audible

noise and enter CCM

OVP

Threshold 10% 8% 10% 10%

Reduce overshoot on PFC output

during input surge or rapid

on/off/on

Optimized for PFC bus voltage OVP2 Yes No Yes Yes

Burst Mode

Threshold 10% 15% 15% 10%

Prevents burst mode from causing

audible noise at high line input

More Information: www.ti.com/lit/an/slua974/slua974.pdf

UCC28180 | 8-pin Continuos Conduction Mode (CCM) PFC Controller

17

• Low frequency operation supports use with IGBT

• High frequency operation supports GaN/SiC/Si FET

• Less than 5% THD from medium-to-full load (50-100%)

Features Benefits

• Universal AC Input

• Boost PFC converters

• Server & Desktop Power Supplies

• White Good Appliances (A/C, Refrig)

• Industrial Power Supplies (DIN Rail)

• Flat Panel TVs (PDP/LCD/LED)

• Wide Range Programmable Fixed Switching

Frequency Operation from 18 kHz to 250 kHz

• Enhanced Dynamic Response Circuit

• Reduced Current Sense Thresholds

• Audible Noise Minimization Circuitry

• Burst Mode for No Load Regulation

Applications

UCC28065 | Two-Phase Int TM PFC Controller with High Fsw

• IEC61000-3-2 compliant SMPS for DTV, OLED TV, monitor,

AIO, projector, gaming, audio equipment and industrial

• AC adapter front end power supplies

• Lighting, display and signage

• Telecom rectifier power supplies

Applications

Benefits Features

• 16-pin Two-phase interleaved TM PFC controller

• Supporting up to 800kHz switching frequency

• Exceeds Energy Star, CoC Tier 2, DOE level VI standards

• Fast, enhanced dynamic response (non-linear EA gain)

• Line Feed Forward Compensation

• Phase Shedding for high light load efficiency

• Line independent phase–off function (Adjustable)

• Burst mode allows very low standby consumption and

avoiding audible noise

• Soft-in and soft-out from burst cycle (Low Audible

noise)

• Adjustable Burst mode power level independent of

line voltage

• Reduced ICC consumption in light load condition

• Interleaving provides lower input and output current

ripple

• 2-3x lower Inductance compared to UCC28064A

• Good light load efficiecny based on burst mode

operation and phase shedding

• Excellent load and line transient response

• System (PFC + LLC) No Load power consumption of

120mW @ 230VIN with PFC stage still on exceeds

CoC version V Tier II standard

18

ZCD_B

VSENSE

UCC28065

TSET

PHB

ZCD_A

VREF

GDA

PGND

COMP

AGND

VINAC

HVSEN

VCC

GDB

CS

BRST

PHB Threshold

VRECT

L

N

RZCDARZCDB

CS

RCS

Burst Threshold

CS

VCC HVSEN

VSENSE

VSENSE +

–

HVSEN

LALB

VOUTVRECT

Currently in pre-production sampling. Will production release late May 2020

UCC28065 Changes from UCC28064A

19

Considering the tolerance and temperature range, the

maximum frequency is 800 kHz with 400 kΩ TSET resistor

UCC28065 maximum switching frequency is 2x higher

than UCC28064A

0 100 200 300 400 500RTSET (kΩ)

0

1

2

3

4

5

6

t min (

µs) UCC28064A

UCC28065

Parameter UCC28064A UCC28065

Zero crossing compensation On time increases when VINAC pin

voltage close to zero

Fixed on time regardless of VINAC

pin voltage

Minimum period

(frequency clamping) 𝑡𝑚𝑖𝑛 =

𝟏𝟔 ∙ 𝐶𝑡 ∙ 𝑉𝑡

5 ∙ 𝐼2 −𝑉𝑇𝑆𝐸𝑇𝑅𝑇𝑆𝐸𝑇

∙18

𝑡𝑚𝑖𝑛 =𝟖 ∙ 𝐶𝑡 ∙ 𝑉𝑡

5 ∙ 𝐼2 −𝑉𝑇𝑆𝐸𝑇𝑅𝑇𝑆𝐸𝑇

∙18

Recommended frequency at

low line (115 VAC) full load 20 kHz – 75 kHz 20 kHz – 150 kHz

UCC28065 Benefit

20

Device Inductance Inductor Dimensions

(Diameter, Height)

Switching Frequency

@ 90VAC, 300W

UCC28064A 340 µH D: 38 mm, H:17.5 mm 53.5 kHz

UCC28065 110 µH D: 28.3 mm, H: 12.3 mm 165 kHz

UCC28065 UCC28064A UCC28065 UCC28064A

30% Height Reduction 25% Diameter Reduction

Power Factor and iTHD

21

0.5

0.6

0.7

0.8

0.9

1

0 100 200 300

Po

we

r F

ac

tor

Load Power (W)

230V UCC28065

115V UCC28065

230V UCC28064A

115V UCC28064A

0

20

40

60

80

100

120

0 100 200 300

iTH

D (

%)

Load Power (W)

230V UCC28065

115V UCC28065

230V UCC28064A

115V UCC28064A

• Test conditions at 500 W with 110 µH inductor

• UCC28064A design has external circuit to disable the zero crossing compensation to

achieve reasonable power factor and iTHD performance

• UCC28065 has NO external circuit and is able to achieve better PF and iTHD

Efficiency

22

90%

92%

94%

96%

98%

0 100 200 300 400

Eff

icie

nc

y

Load Power (W)

230V

115V

90V

Component UCC28064A UCC28065

Boost Inductor 340 µH 110 µH

TSET Resistor 115 kΩ 300 kΩ

MOSFET IRFB11N60APBF STF33N60M6

R17

(Burst Level setting) 15 kΩ 7.5 kΩ

R29 (PHB setting) 47 kΩ 36.5 kΩ

UCC28064A EVM UCC28064EVM-004

modified to work with UCC28065

23

• Low audible noise at standby and light load

• Highly integrated feature-set reduces BoM cost

• Supports self-start power supplies, eliminates auxiliary flyback

power supply

• Enables compliance to CoC Tier 2 and DoE Level VI efficiency

standards with low system cost

• Optimized Low Power Mode and Burst Mode

• Burst mode with soft-on and soft-off periods

• Minimized audible noise at no load and standby

• User option to disable burst mode

• Opto-coupler low power operation

• Low standby power and high light load efficiency

• Hybrid Hysteretic Control (HHC)

• Best-in-class load and line transient response

• Inherent feedback to ensure 50% duty cycle

• Integrated high-voltage gate drivers

• Robust adaptive dead-time control

• Robust capacitive region (ZCS) avoidance scheme

• Built-in high voltage startup

• Active x-capacitor discharge

• Robust protection functions: Three level over-current, Over-

Temperature, Output over voltage, Input voltage UVLO

Features Benefits

• TV

• Lighting

• Industrial AC-DC adapter

• Power Tool

• Telecom

Applications

VCC

FB

LO

HO

HS

BLKVIn

BW

Vout

CrLr

Lm

ISNS

VC

R

4

6

5

3

1

10

11

14

15

16HV

LO

GND

LL/SS

HO

VCC

VCR

FB

BLK

7

UCC25640xLLC

Controller

HB

HS

12RVCC

9BW

ISNS

8

AC Line

AC Neutral

BLK

FB

ISNS

VCR

BW

HO

HS

LO

13 V to PFC controller bias

VCC

CSS

CBOOT

RHV

UCC25640x | Half Bridge LLC with Enhanced Audibility

Hybrid Hysteretic Control (HHC)

24

More Information: www.ti.com/lit/an/slua834a/slua834a.pdf

Outer Voltage Loop

DFC and HHC

Inner “Current”

Loop

HHC

What is HHC? HHC Results

DFC HHC

Hybrid Hysteretic Control (HHC) adds an

inner control loop to a traditional direct

frequency control (DFC) loop

HHC enables greater transient

response, enabling reduction of

output capacitance

UCC25640x Advantages

25

Industry best minimum

switch node slew rate

detection of 0.1 V/ns

Enhanced burst mode with

wide range programmability,

ability to dynamically adjust

or disable

User programmable initial

voltage for soft start Advantage

System

Benefit

Supports larger capacitor

on switch node, allowing a

FET with larger COSS or

increased snubber for EMI

Enables greater optimization

between standby power

consumption and

performance with reduced

audible noise

Enables programmable

maximum limit of switching

frequency during startup

0.00

0.50

1.00

1.50

2.00

0.00 1.00 2.00 3.00

Ga

in (

MG)

Normalized Fsw

Start fsw

Burst Mode Switching Pattern

LLC Transformer Current

UCC25640x Variants

26

UCC256402 UCC256402A* UCC256403 UCC256404 UCC256404A*

Target

Application

Industrial

Lighting

Industrial

Lighting

TV –Screen

Telecom, Industrial TV – Wide input LLC TV – Wide input LLC

Burst Mode

Algorithm

• 16 pulses burst packet

• No burst soft on/off

• Bust mode can be disabled

• 16 pulses burst packet

• No burst soft on/off

• Bust mode can be disabled

• 40 pulses burst packet

• Soft-on and soft off

• Bust mode can be disabled

• 40 pulses burst packet

• Soft-on and soft off

• Bust mode can be disabled

• 40 pulses burst packet

• Soft-on and soft off

• Bust mode can be disabled

Integrated

HV Startup Yes Yes No Yes Yes

X-Cap

Discharge No No No Yes Yes

Minimum

Detectable

Slew Rate

0.1 V/ns 0.1 V/ns 0.1 V/ns 0.1 V/ns 0.1 V/ns

BLK Start 3 V 3 V 3 V 1 V 1 V

BLK Stop 2.2 V 2.2 V 2.2 V 0.9 V 0.9 V

BLK OVP No Yes No No No

Bias Winding

OVP Auto-Restart Auto-Restart Auto-Restart Auto-Restart Latch

RVCC 13 V 13 V 13 V 13V 13V

*Currently in pre-production sampling. Will production release on March 20th.

New Product Updates now on our website!

27

https://training.ti.com/npu

Upcoming New Product Updates

28

Date Topic

3/26/2020 DACs

4/2/2020 Hi Speed Amplifiers

4/9/2020 Integrated Power Modules

4/16/2020 High Speed Signal Conditioning-

LVDS, M-LVDS & PECL

HDMI, DisplayPort & MIPI