SC801 Fully Integrated High Current Lithium-Ion Battery...

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SC801Fully Integrated High Current

Lithium-Ion Battery Charger SystemPOWER MANAGEMENT

Revision 5, November 2004

Description Features

Applications

Typical Application Circuit

Fully integrated charger with FET pass transistor,reverse-blocking diode, sense resistor and thermalprotection4.1V, 4.2V & Adjustable Output VoltageProgrammable precharge, fastcharge & terminationcurrentBattery voltage controlled to 1% accuracySoft-start for step load and adaptor plug-inUp to 1.5A continuous charge currentCharge current monitor output from microcontrolleror ADC InterfaceInput voltages range from 4.2V to 14V0.1µA Battery leakage in shutdown and monitormodesOperates without a battery in regulated LDO modeSmall 4mm x 4mm 16 lead MLP packageLow thermal impedance of 50°°°°°C/wattFew external componentsOver current protection in all charging modesOver voltage protectionAll outputs able to drive LED’s and interface to hostprocessorRemote Kelvin sensing at the battery terminalSmall input & output filter capacitorsStatus output communicates charging and end ofcharge cycleNow Available in Lead-Free PackagingCharges Li-Ion, Li-Polymer, NiCd and NiMH Batteries

Cellular phonesPDA’s and Handheld computersHandheld metersCharging stationsDigital cameras

The SC801 is a fully integrated, single cell, constant-cur-rent/constant-voltage Lithium-Ion\Li-Polymer batterycharger management system. The SC801 has built in in-telligence and extreme functionality. When the batteryvoltage is below 2.8V the charger operates in a pre-charge mode with a charging current of up to 125mAbased on the ITERM pin resistor. This pre-charge mode isset to limit power dissipation due to an underchargedbattery. When the battery voltage exceeds 2.8V, thecharger enters a fast charge mode. In this mode, theSC801 delivers up to 1.5A to the battery based on theIPRGM pin resistor.

The part also features current termination, ending thecharge cycle when the battery is charged and the chargecurrent drops below the current programmed by theITERM pin resistor. In addition, the charge current canbe monitored by the voltage on the IPRGM pin allowing amicrocontroller or ADC to access the current informa-tion to determine when to externally terminate the chargecycle. Once the charge cycle is complete and terminates,the device enters the charge monitor mode where theoutput voltage of the battery is monitored. If this voltagedrops below the recharge threshold the device will enterthe fast charge mode again, to bring the battery to itsfully charged state. Both the shutdown and monitormodes drain no more than 1uA from the battery guaran-teed.

The output voltage to the battery is controlled to within1% of the programmed voltage for either 4.1V or 4.2V.The SC801 can also function as a general purpose cur-rent source or as a current source for charging nickel-cadmium (NiCd) and nickel-metal-hydride (NiMH) batter-ies using external termination.

CHARGERFAULT

BATTERY

R2

CHARGER VIN

STATUSSC801

14

1

374

15

910

2

11

5

8

13

616

12

VCC

BSEN

IPRGMENITERM

VOUT

OVPSTAT

VPRGM

CP

NC

BIP

VCC

GNDVOUT

NC PRESENT

C22.2uF

R1C11uF

88 R1.5 Current n Terminatio 1000

R1.5 Current Charge-Fast 88

R2.8 Current Charge-Pre

212

•

=•

=•

=

2 2004 Semtech Corp. www.semtech.com

SC801

POWER MANAGEMENTAbsolute Maximum Ratings

Electrical Characteristics

retemaraP lobmyS mumixaM stinU

DNGotNE,CCV 0.41ot3.0- V

DNGotPIB,MRETI,TATS,PVO,PC,MGRPI,MGRPV,TUOV 0.6+ot3.0- V

/Wm02etareD(PLM,noitapissiDrewoP C° 58evoba C° ) PD 5.2 W

DNGottrohsTUOV suounitnoC

tneibmAotnoitcnuJ,ecnatsiseRlamrehT θ AJ 84 *W/C°

erutarepmeTnoitcnuJgnitarepO TJ 051 C°

erutarepmeTwolfeRRIsdnoces01)gniredloS(

noitpoRT T TRRI 042 C°

)emarfdaeleerfdael(noitpoTRT T TRRI 062 C°

erutarepmeTegarotS T GTS 051ot56- C°

)ledoMydoBnamuH(gnitaRDSE DSE 2 Vk

retemaraP lobmyS snoitidnoC C°52 TA04-( ° 58+otC ° )C

stinU

niM pyT xaM niM xaM

egatloVtupnI CCV 2.4 41 V

egatloVgnitarepO V PO 2.4 5.6 V

tnerruCgnitarepO I CC edoMgnigrahCAµ0=PC,SUTATS,PVO

2

AmedoMODL

Aµ0=PC,SUTATS,PVO52

tnerruCegakaeLyrettaB I TUOV V0=CCV 1.0 1 Aµ

egatloVdetalugeR V TAB V MGRP hgiHcigoL=V MGRP woLcigoL=

02.401.4

61.460.4

42.441.4

V

kcabdeeFedoMtsujdAegatloV

V MGRP rediviDlanretxE=V CC V5.6-V2.4=

0.3 79.2 30.3 V

tnerruCegrahC-erPyrettaB P ICI MRET k10.3=RrotsiseR

V YRETTAB V5.2>

28 27 29

AmtnerruCnoitanimreTyrettaB I MRET 54 83 25

tnerruCegrahC-tsaFyrettaB F IC I MGRP k10.3=I MGRP k78.1=

V YRETTAB V8.3=Vm055=egatloVtuoporD

005008

054057

055058

Am

Unless otherwise noted: VCC = 4.75V - 5.25V

Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parametersspecified in the Electrical Characteristics section is not implied.

* Tied to PCB with 1 Square Inch, 2 Ounce Copper


SC801

POWER MANAGEMENTElectrical Characteristics Cont.

retemaraP lobmyS snoitidnoC C°52 TAotC°04-()C°58+

stinU

niM pyT xaM niM xaM

egrahC-tsaFyrettaBtimiLtnerruC

VCCV 01 Am

tnerruCecruoStuptuOPC OLVU>CCV 01 Am

egakaeLtupnIESNESBtnerruC

1.0 1 Aµ

stuptuOPC,PVO,TATS V HO Am01=daoL 4.2V

Am1=daoL 6.2

V LO Aµ005-=daoL 52.0 V

stupnIMGRPV,PIB,NE V HI 8.1 V

V LI 4.0 V

** Thermally Limited

Unless otherwise noted: VCC = 4.75V - 5.25V


SC801

POWER MANAGEMENTPin Configuration Ordering Information

Pin Descriptions#niP emaNniP noitcnuFniP

1 NESB tonoD.egatlovyrettabesnesnivleKotlanimretyrettabottcennoC.nipesnesegatlovyrettaB .gnitaolfnipsihtevael

2 MGRPV .elbatsujda=rotsiseR.V2.4=hgihcigoL.V1.4=wolcigoL.nipmargorpegatlovelbatceleS

3 MGRPI margorpotdnuorgotrotsiseraseriuqeR.edomegrahctsafninipmargorptnerrucregrahC .tnerrucegrahc-tsaf

4 MRETI otdnuorgotrotsiseraseriuqeR.tnerrucegrahc-erpdnanoitanimrettnerrucrofnoitceleS .tnerrucnoitanimretdnaegrahc-erpmargorp

5 CN tcennoCoN

6 DNG dnuorG

7 NE .ecivedselbasidwolcigoL.ecivedselbanehgihcigoL.nipelbasid/elbaneeciveD

8 PIBhgihcigoL.ecalPnIyrettaBslangistahtrellortnocorcimroyrtiucriclanretxemorfdeviredtupnI

oD.edomODLotniecivedstupwolcigoL.edomgnigrahcnidnaecalPnIyrettaBsetacidni.gnitaolfnipsihtevaelton

9 PVO .Am01ecruoSnacnipsihTV5.6nahtrehgihsiegatlovtupniregrahcfigalftluafegatlovrevO

01 TATS ninehW.)woL(egrahcfodnedna)hgiH(egrahctsaF,)hgiH(egrahc-erP:niPsutatSregrahC .Am01ecruosnacnipsihT.ecnadepmihgihsinipsihtedomODL

11 PC ehtfosseldragersnipCCVehtotrewopsierehtnehwhgihcigol,rotacidnitneserpregrahC .Am01ecruosnacnipsihT.etatsnipelbanE

21 CN tcennoCoN

31 CCV .rewoprotpadaottcennoc,nipylppuS

41 CCV .rewoprotpadaottcennoc,nipylppuS

51 TUOV .yrettabottcennoc,tuptuoregrahC

61 TUOV .yrettabottcennoc,tuptuoregrahC

T daPlamrehT htiwenalpdnuorgehtotyltceridredloS.egakcapehtfomottobnodapnoitcudnoc-lamrehT .senalpdnuorgrehtollaotsaivlamrehtelpitlum

ECIVED )1( EGAKCAP

RTLMI108CS 61PLM

TRTLMI108CS )2( 61PLM

BVE108CS )3( draoBnoitaulavE

Notes:(1) Only available in tape and reel packaging. A reel con-tains 3,000 devices.(2) TRT extension designates the lead-free leadframepackage option.(3) Specify the desired IC part number when ordering.

MLP16: 4X4 16 LEAD

TOP VIEW

BIPENGNDNC

CP

STAT

12

11

10

9

NC

OVP

8765

1

2

3

4

BSEN

VPRGM

IPRGM

ITERM

13141516

VCCVCCVOUTVOUT

T


SC801

POWER MANAGEMENTBlock Diagram

+-

+-

+- +

-

+-

+ -

+ -

+ -

ControlEN

1.2V

Referenceand OT SD

EN

Status

Termination

VprogDetect

UV

OV

1.2V

4.2V

4.1V

3.0V

Vout

V_FB

4.2V

4.1V

3.0V

1.2V

Termination

1.2V

ChargePump

Fast ChargeEnable

100 1 100 0.1

EN

OVP

GND

STAT

BIP

BSEN

VPRGM

ITERM IPRGM

VOUT

VCC

CP

7

9

6

10

11

8

1

2

4 3

15,16

13,14


SC801

POWER MANAGEMENT

Monitor ModeIn the monitor mode the voltage of the battery will bemonitored against the programmed voltage. This will oc-cur after a battery has been fully charged and the devicehas shut off. If the voltage of the battery falls below therecharge threshold (specified at 200mV) the charger willactivate and charge the battery to its programmed volt-age. This means that it will enter the full charging se-quence from fast-charge to terminating the charging cyclewhen the programmed termination current is reached.The maximum current drain of the battery during moni-tor mode will be no more than 1uA over temperature.

LDO ModeOne of the nice features of the SC801 is its ability towork with or without a battery. If the battery is not inplace the device can enter the LDO mode. In this modethe SC801 will act like a low dropout regulator. The out-put voltage is set to 4.1V, 4.2V or externally set by aresistor divider. See the section titled “Configuring theOutput Voltage to the Battery” for setting an output volt-age other than 4.1V or 4.2V. The input pin BIP (BatteryIn Place) is used to switch the SC801 from charger modeto LDO mode. If this pin is logic high the device will be incharger mode, if it is logic low it will be in the LDO mode.During LDO mode the device will regulate the output volt-age with a current limit set by the resistor tied to theIPRGM pin. The BIP pin can be tied to the CP pin to placethe device in charge mode whenever the adaptor is inplace. The maximum voltage on the BIP input pin is 6V,so do not tie it to the VCC input since this voltage canexceed 6V in some conditions. The BIP pin should neverbe left floating, but instead, should be tied through pull-up/pull-down resistors when connected to a high imped-ance control pin, otherwise it can be connected directlyto the CP pin or GND. The equation for setting the cur-rent limit in the LDO mode will be:

1000 R1.5

ILDOPRGM

•

=

LED FlagsThere are three LED drivers on the SC801: OVP (OverVoltage), STAT (Status) and CP (Charger Present). Eachoutput can drive an LED directly without a current limitresistor. In addition, each output can be monitored by amicroprocessor for change in their status. The table abovedefines each LED output.

Applications Information

Pre-Charge ModePre-charge mode is automatically enabled whenever thebattery voltage is below 2.8V. It is primarily used to limitthe power dissipation of the battery and the SC801 de-vice whenever the battery is undercharged. As the bat-tery begins to charge in this mode, the voltage of thebattery will rise and when the 2.8V limit is reached, theSC801 will switch to the fast charge mode. The pre-charge current value is selected by the termination re-sistor on the ITERM pin. The maximum range of the pre-charge current is from 10mA to 125mA. Whenever thecharger is in pre-charge or fast-charge the status LEDwill light indicating that the battery is being charged. Theequation to select the pre-charge current is given by:

88 R2.8

PCITERM

•

=

Fast-Charge ModeThe fast-charge mode exists while the battery voltage isabove 2.8V and the battery is not fully charged. The fast-charge current can be set to a maximum of 1.5A and isselected by the program resistor on the IPRGM pin. Infact, the voltage on this pin will represent the currentthrough the battery enabling a microprocessor or ana-log-to-digital converter (ADC), to monitor battery currentby sensing the voltage on the IPRGM pin. The equationto set the fast-charge current is given by:

1000 R1.5

FCIPRGM

•

=

Note that for a given program resistor the current throughthe battery can be determined by replacing 1.5 with theactual voltage on the IPRGM pin in the above equation.

Termination CurrentOnce the battery reaches the program voltage of 4.1V,4.2V or externally set voltage, the device will transitionfrom a constant current source to a constant voltagesource, as the current through the battery begins to de-crease while the voltage remains constant. During thistime when the current falls below the programmed ter-mination current set by the termination resistor on theITERM pin, the SC801 will turn off and the end of chargewill be indicated by the status LED turning off. The equa-tion to set the termination current is given by:

88 R1.5

ITERMTERM

•

=


SC801

POWER MANAGEMENTApplications Information (Cont.)

The CP output can be used for a UVLO indicator. Regard-less of the state of EN, the CP output reflects the volt-age of the VCC (adapter) input. When VCC is above UVLO,CP is high, 2.8V. When VCC is below UVLO, CP is low, 0V.The CP pin can also put the device into the charge modewhenever the adaptor has power, by connecting it to theBIP pin.The OVP LED will light whenever the SC801 is enabledand there is an overvoltage on the VCC pins. When thisoccurs the SC801 will turn off and stay off as long as theovervoltage condition remains. As soon as the overvolt-age is removed the SC801 will resume operation. TheOVP LED will not light if the part is disabled, even thoughan overvoltage is present on the VCC pins.

Configuring the Output Voltage to the BatteryThe battery voltage is set by the VPRGM pin. If this pin islogic high the output voltage is set to 4.2V. If this pin islogic low the output voltage will be set to 4.1V. The VPRGMpin can be tied to the CP pin for 4.2V operation and groundfor 4.1V operation. For a value other than 4.1V or 4.2V aresistor divider is required. This divider is set betweenthe VOUT pin and the VPRGM pin with the divider tapconnected to the BSEN pin. The schematic for such aconnection and the equation to set the output voltage isgiven in Figure 1. The output voltage for Figure 1 will beset to 4.77V with the resistors shown. The capacitor C1may be needed for stability and or reduced ripple volt-age. It is advisable to leave room on the PCB for addingthis capacitor, since it can be left out if it is not needed.The evaluation board does have a place for the resistordivider and capacitor to allow an adjustable voltage tobe set on this board via R1, R2 and C2 (see schematicon page 10). With JP7 removed, jumper JP2 should beadded to complete the changes required for adjustablemode operation on the evaluation board. For furtherevaluation board information, see the section tilted Evalu-ation Board.

SC801

14

1

374

15

910

2

11

5

8

13

616

12

VCC

BSEN

IPRGMENITERM

VOUT

OVPSTAT

VPRGM

CP

NC

BIP

VCC

GNDVOUT

NCPRESENT

+5V

BATTERY

C21uF

C1

330pF

FAULT

R4

59K

R3

100K

CHARGERSTATUS

C32.2uF

R1 R2

3.0 R3R4

1VOUT •

+=

FIGURE 1

Remote Kelvin Sensing at the BatteryAnother nice feature of the SC801 is its ability to sensethe battery voltage directly at the battery with its KelvinBSEN pin. This allows the designer great flexibility in PCBlayout and achieves a much greater accuracy in sensingthe battery voltage where it counts, at the battery termi-nals! Therefore, when laying out the PCB the designershould route the BSEN pin directly to the terminal at whichthe battery gets connected. In addition, in the LDO mode,the BSEN pin will still need to sense the output voltage.In LDO mode, the BSEN pin becomes the regulation feed-back for the control-loop. In this case it is sensing theoutput voltage of itself, since the battery is not in place.Therefore BSEN should never be left floating.....

Capacitor SelectionInput and output capacitors can be low cost ceramic type.The output capacitance range is 1uF to 4.7uF. The inputcapacitor should be between 0.1uF to 1uF.

Overcurrent and Temperature ProtectionOvercurrent protection is inherent to the SC801. TheSC801 operates as a current source and the output cur-rent is limited by the mode it is in at the time. If in thefast-charge mode the current is limited by the IPRGMresistor, the fast-charge current. When the output volt-age is less than 2.8V, the current is limited by the ITERMresistor, the pre-charge current. Both of these functionsprotect the device in an event of a short circuit conditionon the output. In the LDO mode the current is limited tothe fast-charge current, provided there is voltage on theoutput. Under a short circuit condition in the LDO modethe current will enter a “hiccup” mode. The temperatureshutdown can protect the device in conditions of excesscurrent as well, by shutting down the device when its dietemperature exceeds 165oC.

GALFDEL NO FFOHGIH

ECNADEPMI

PC CCVOTREWOP SNIPOTREWOPON

SNIPCCVX

PVO -REVOCCV EGATLOVEGATLOVCCV

LAMRONX

TATS YRETTAB GNIGRAHCYLLUFYRETTAB

DEGRAHCEDOMODL


SC801

POWER MANAGEMENTApplications Information (Cont.)Using the SC801 With a Charge Controller ICThe SC801 can also be used with numerous charge con-troller ICs on the market. In many instances the chargecontroller will control the charging and termination of theSC801. The best method of interfacing the SC801 withsuch a device is to place the SC801 in LDO mode, andmonitor the current to the battery by an ADC thatsamples the voltage on the IPRGM pin. Slow and fastcharge can be controlled by placing two resistors in se-ries from IPRGM to GND and adding a transistor switchacross one of the resistors. This way the current can bemonitored for proper termination by the charge control-ler. In LDO mode the STAT LED will not light. When charg-ing the battery in LDO mode the charge profile will be thesame as in charge mode except there will be no prechargeor termination current function. Meanwhile, the maxi-mum current the battery will see is set by the batteryequivalent circuit or the fast-charge current limit. Thebattery will still charge in this mode, albeit a slightly dif-ferent approach than placing the charger in the chargemode.

Evaluation BoardThe evaluation board is shown on Page 10. The evalua-tion board was designed to test the complete operationof the SC801 and the SC801M. Note the minimum partsrequirement is shown within the dotted rectangle on theschematic. The adaptor voltage of 5V is applied to TP1and TP2 which supplies power to the SC801. The outputcharger voltage or LDO output voltage is taken off ofTP4 and TP5. Jumper JP5 will set the device in LDO modewhen inserted or charge mode when left open. JumperJP6 will enable the device when inserted or disable thedevice when left open. Note as long as power is appliedto VCC the CP LED will light, regardless of the EN pinlevel. Jumper JP4 is used to measure the bias current ofthe SC801 and should always be in place except whenmeasuring bias current. JP1 and JP3 set the charge limitvoltage to 4.2V or 4.1V respectively. Only one of thesejumpers JP1 or JP3 should be in place at any given time.If you expect VCC to exceed 6V (testing breakdown ofthe SC801) and you want to set the output voltage to4.2V you should remove any jumper on JP1 and manu-ally tie pin 2 of JP1 to the CP pin, because the absolutemaximum voltage on the VPRGM input pin is 6V. JumperJP7 when inserted will short the BSEN line to Vout forcharging Lithium-Ion batteries. Jumper JP2 should be in-serted when an adjustable voltage is required, with theaddition of R1, R2 & C2. For more information about

selection of an adjustable voltage see the section titled,Configuring the Output Voltage to the Battery. Note, onlyone of these jumpers JP2 or JP7 should be inserted atany given time. Jumper JP8 should be left open and isused only for testing SC801M operation. Connector J1is used for connecting the evaluation board to a demon-stration platform to exemplify the SC801 operation. Othercomponents on the eval board consist of Semtech’sSD12 and SD05 ESD clamp diodes which should be partof any system requiring ESD protection. LED’s for statusinformation and TP3 which will allow the current throughthe battery to be monitored. The input capacitor C1 ischosen to be 10uF to decouple any inductance from alaboratory supply when evaluation is taking place.

Complete Charge CycleThe complete charge cycle of the SC801 is shown onpage 15. The pre-charge current will be under controluntil the precharge threshold of 2.8V is reached. At thistime the device enters the fast-charge mode and theoutput voltage continues to increase as the constantcurrent is applied to the battery. Eventually constant volt-age is reached and the current begins to decrease untilthe termination current threshold is reached at whichtime the SC801 will turn off. Many Lithium-Ion batterieshave a built in under-voltage detect circuit. This makesthe battery pack open circuited when the battery volt-age falls below 3V typically. With these batteries theSC801 will unlikely enter pre-charge operation becausethe battery voltage will always be above 2.8V.


SC801

POWER MANAGEMENT

Applications Information (Cont.)Layout GuidelinesTry to keep the traces from the adaptor input to the VCCpins as wide as possible, to eliminate any voltage dropacross the device input traces. You want to make surethe input-to-output voltage differential of the device doesnot approach the dropout voltage. A curve of the drop-out voltage vs. output current is shown on page 15. Anyvoltage dropped over the input traces from the adaptorwill reduce the dropout voltage margin.

Make the high current output trace from the VOUT pinsas wide as possible. The BSEN line should be used prop-erly to compensate for any voltage drops from the out-put trace to the battery. Make a Kelvin connection withthe BSEN trace to where VOUT connects the battery ter-minals. This is done by taking the BSEN trace and tying itto the VOUT trace as close to the battery terminals aspossible. This way, any voltage drop across the trace re-sistance to the battery will be compensated for becauseBSEN will regulate the device output voltage (VOUT) atthe point it connects to the VOUT trace. If you tie theBSEN line to the VOUT pin at the device you will eliminatethe benefit of its purpose and the trace resistance dropwill not be compensated. Therefore, it is best to havethe BSEN trace follow in parallel the VOUT trace and tiethem together at the contact point of the battery termi-nal for the best result.

The bottom of the SC801 package has a heat slug andthis slug should be tied to a ground plane of the PCBthrough one large via or a series of smaller vias. If thereis no ground plane, an area should be dedicated on thebottom of the PCB to act as a heat sink. The evaluationboard has 1 square inch of copper and allows an outputcurrent of greater that 1A. The more copper tied to thisslug the greater the output current available before ther-mal limitations dominate. The two pins that are labeledNC are not connected to the die. Therefore, tying thesepins to the ground plane offers no aide in heat removaland has no electrical benefit.


SC801

POWER MANAGEMENTEvaluation Board Schematic

Top Gerber

Evaluation Board Gerber Plots

Bottom Gerber

Inner Gerber Silk Screen Gerber

1 2JP34.1V

D1SD12

D2SD05

C42.2uF

VCC14

BSEN1

IPRGM3

EN7

ITERM4

VOUT15

10STATVPRGM

2

CP 11NC5

VCC13

VOUT 16

NC 12

OVP 9

GND6 BIP8

U1

SC801

R7619

R3100K

12

JP5CHGR / LDO

12

JP6ENABLE / DISABLE

R41M

+C1

10uF/25V

1

TP4

VOUT / VCHGR2OPEN

R1OPEN

1 2JP2

Adjustable Vout

12

JP7Li-Ion

1 2

JP14.2V

1

TP1+5VIN

1

TP5GND

1

TP2GND

1 2JP8

SC801/SC801M

D5STATUS

C2OPEN

1

TP3ISENSE

12

JP4BIAS

D3CP

R63.01K

C30.1uF

D4FAULT

R51.24K

+1

+3

+5

+7

+9

+11

+13

+15

+ 2

+4

+ 6

+8

+ 10

+ 12

+14

+ 16

J1

CON16AP


SC801

POWER MANAGEMENTLDO Mode Timing Diagram

LDO ModeLDO Mode

Vcc

Vout

CP

OVP

Stat

BIP

EN

1ms

Iout

High Z

PrechargeLimit

ILIMIT

4.2V

6.5V

4.2V

6.3V

4ms1ms

ILIMIT

Low

Soft Start

1ms 1ms 4ms

5V

1ms


SC801

POWER MANAGEMENTCharge Mode Timing Diagram

Charge ModeCharge Mode

Vcc

Vout

CP

OVP

Stat

BIP

EN

Iout

PrechargeLimit

1ms

4.2V

Icharge

End of Charge

2.8V

4.2V

4msSoft Start

1msprecharge

1ms

MonitorMode

4ms

Charge ModeCharge Mode

1ms

4.0V

TerminationCurrent


SC801

POWER MANAGEMENTState Diagram

Shutdown ModeVout/Iout off

CP,STAT,OVP Low

VOUT > 2.8V

Soft StartFast Charge Mode

BSEN = CV

Start Pre-Charge

BSEN = CV

VOUT > 2.8V

IOUT < ITERM

Monitor ModeSTAT = Low

Vout off

BSEN < CV-200mV

Yes

Yes

Yes

Yes

Yes

Vin > UVLO

Yes

Iout = 1500/Rprog

Iout = 246/Rterm

Start CV Mode

Yes

BIP High

Over Voltage, Under Voltage, or Over Temperature will force the SC801 into Shutdown Mode from any state.En = HighAnd

Tj < Over Temp SD

CP Output = High

Charge ModeSTAT=High,LDO ModeSTAT = High Z,

Iout > 1500/Rprog

LDO Current Limit

Iout = 1500/Rprog

BSEN = CV ?

Yes

Yes


SC801

POWER MANAGEMENTTypical Characteristics

Fast Charge Current vs IPRGM Resistance

0200400600800

100012001400

1.2 1.3 1.5 1.6 1.9 2.2 2.6 3.1 4.0 5.6 9.4 27.6

IPRGM Resistance (kohm)

Fast

Cha

rge

Cur

rent

(mA

)

Output Voltage vsTemperature

4.18

4.19

4.2

4.21

-40 -20 0 20 40 60 80 100 120

Temperature (Degrees C)

Out

put V

olta

ge (V

olts

)

ILOAD = 250mAILOAD = 500mA

Output Voltage vs Temperature

4.08

4.09

4.1

4.11

-40 -20 0 20 40 60 80 100 120


Out

put V

olta

ge (V

olts

)

ILOAD = 250mAILOAD = 500mA

Charge Mode Bias Current vs Input Voltage

1

1.25

1.5

1.75

2

4.3 4.7 5.1 5.5 5.9 6.3 6.7

Input Voltage (Volts)

Bia

s C

urre

nt (m

A)

LDO Mode Bias Current vs Input Voltage

02468

10121416

4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1 6.3 6.5 6.7 6.9

Input Voltage (Volts)

Bia

s C

urre

nt (m

A)

Vout Leakage Current vs Temperature

00.10.20.30.40.50.60.70.80.9

1

-40 -20 0 20 40 60 80 100 120


Leak

age

Cur

rent

(uA

)


SC801

POWER MANAGEMENT

IPRGM Voltage vs Output Current

0200400600800

1000120014001600

0 200 400 600 800 1000

Output Current (mA)

IPR

GM

Vol

tage

(mV)

RPRGM = 1.87K

Dropout Voltage vs Output Current

50

150

250

350

450

550

650

10 210 410 610 810 1010

Output Current (mA)

Dro

pout

Vol

tage

(mV)

Typical Characteristics

Battery Charge Profile

1.5

2

2.5

3

3.5

4

4.5

0:00

0:10

0:20

0:30

0:40

0:50

1:00

1:10

1:20

1:30

1:40

1:50

Charge Time

Cha

rge

Volta

ge (V

olts

)

00.10.20.30.40.50.60.70.80.91

Cha

rge

Cur

rent

(Am

ps)

VoutIout


SC801

POWER MANAGEMENTOutline Drawing - MLP (16 pin)

Marking Information

yy = two-digit year of manufactureww = two-digit week of manufacture

Top Mark

.003

.010

.074

16

.012

.085

-.000.031

(.008)

0.08

0.30

16

.014

.089

0.25

1.90

.040

-.002

-0.000.80

2.25

0.35

2.15

-0.051.00

(0.20)

.004 0.10

1.90 2.15 2.250.65 BSC.026 BSC

0.45.018 .026.022 0.55 0.65

.089.085.074

D/2

2

A

A1

1

LxN

bbb C A B

A2

bxNe

SEATINGPLANE

C

E/2

D1

N

e/2

aaa C

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS.

1.

2.

NOTES:

A D

E

B---

-

INDICATOR(LASER MARK)

PIN 1

DIMENSIONS

NOMINCHES

N

bbbaaa

A2A1

E1

D1

DIM

Le

E

D

A

b

MIN MAXMILLIMETERSMINMAX NOM

.153 .157 .161 3.90 4.00 4.10

.153 .157 .161 3.90 4.00 4.10

E1


SC801

POWER MANAGEMENT

Semtech CorporationPower Management Products Division200 Flynn Road, Camarillo, CA 93012

Phone: (805)498-2111 FAX (805)498-3804

Contact Information

Land Pattern MLP-16 pin

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOURCOMPANY'S MANUFACTURING GUIDELINES ARE MET.

NOTES:1.

2x GH2x (C) 2x Z

XP

Y

K

C

Z

P

YX

G

KH

.189

.026

.016

.041

.106

.091

.091

4.80

0.401.05

0.65

2.302.30

2.70

DIM(3.75)

MILLIMETERSDIMENSIONS

(.148)INCHES

SC801 Fully Integrated High Current Lithium-Ion Battery...

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