2022年电脑芯片级维修教程笔记本元器件 .pdf

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1、FEATURESDESCRIPTIONAPPLICATIONS910111232313029SKIPSELTONSELPGOOD1EN1EN5EN3PGOOD2EN2TPS51120RHB(QFN - 32)1314151628272625VBST1DRVH1LL1DRVL1VBST2DRVH2LL2DRVL217PGND28VO27COMP26VFB25GND4VREF23VFB12COMP11VO118CS219VREG320V5FILT21V5REG22VIN23CS124PGND1C30NA+VO15V/6AQ2IRF7832Q1IRF7821-VO1_GNDPGND1VBAT+VO2

2、3.3V/6AQ4IRF7832Q3IRF7821-VO2_GNDPGND2VBATVBATGNDPowerPADR505.1 WV5FILTEN_1P_GOOD1P_GOOD2EN_2EN_LDO5EN_LDO3GNDR11100 k ?C1020 FL14.7 HC1B150 FC1A150 FC110.1 FC311 nFR21100 k ?C210.1 FC1020 FL22.2 HC2A150 FC2B150 FR223.3 k ?R123.6 k ?C511 FC5010 FC3010 FUDG - 05074TPS51120SLUS670AJULY 2005 REVISED AU

3、GUST2005DUAL CURRENT MODE, SYNCHRONOUSSTEP-DOWNCONTROLLERWITH 100-mASTANDBY REGULATORSFORNOTEBOOK SYSTEM POWER?3.3-V and 5-V 100-mA BootstrappedStandbyThe TPS51120is a highly sophisticated dual currentRegulatorswith IndependentEnablesmode synchronousstep-downcontroller.It is a fullfeatured controlle

4、r designed to run directly off a three-?SelectableD-CAP?Mode Enables Fastor four-cell Li-ion battery and provide high-power andTransientResponseLess than 100 ns5-V and/or 3.3-V standby regulation for all the down-?SelectableLow Ripple CurrentModestream circuitry in a notebook computer system. High?L

5、ess than 1% Internal ReferenceAccuracycurrent, 100-mA,5-V or 3.3-V on-board linear regu-lators have glitch-free switch over function to SMPS?SelectablePWM-only/Auto-skipModesand can be kept alive independentlyduring standby?Low-sideRDS(on)Loss-lessCurrentSensingstate.Thepseudo-constantfrequencyadapt

6、ive?RSENSEAccurateCurrentSense Optionon-time control scheme supports full range of currentmodeoperationincludingsimplifiedloopcompen-?InternalSoft-startand IntegratedVOUTsation, ceramic output capacitors as well as seamlessDischargeTransistorstransition to reduced frequency operation at light-load?I

7、ntegrated2-V Referencecondition.OptionalD-CAP?modeoperation?AdaptiveGate Driverswith IntegratedBoostoptimized for SP-CAP or POSCAP output capacitorsDiodeallowsfurtherreductionofexternalcompensationparts. Dynamic UVP supportsVIN line sag without?Power Good for Each Channel with Delaylatchoff byhittin

8、g5V UVP.No negativevoltageTimerappears at output voltage node during UVLO, UVP,?Fault Disable Modeand OCP, OTP or loss of VIN.?SupplyInput VoltageRange: 4.5 V to 28 VThe TPS51120 32-pin QFN package is specified from 40 C to 85 C ambient temperature.?NotebookComputersSystem Bus and I/OPlease be aware

9、 that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.D-CAP is a registered trademark of Texas Instruments.PRODUCTIONDATA information is current a

10、s of publication date.Copyright? 2005, Texas InstrumentsIncorporatedProductsconformto specificationsper the termsof the TexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarily include testing of all parameters.名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - -

11、- - 第 1 页，共 34 页 - - - - - - - - - ABSOLUTEMAXIMUMRATINGS(1)DISSIPATIONRATINGSTPS51120SLUS670A JULY 2005 REVISED AUGUST2005ORDERING INFORMATION(1)(2)ORDERABLEMINIMUMOUTPUTTAPACKAGEPARTPINSORDERECO PLANSUPPLYNUMBERQUANTITYTPS51120RHBTTape-and-reel250PLASTIC QUADGreen-40 C to 85 C32FLAT PACK (QFN)(RoH

12、S and no Sb/Br)TPS51120RHBRTape-and-reel3000(1)All packaging options have Cu NIPdAu lead/ball finish.(2)For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TIwebsite at .over operating free-air temperaturerange unless otherwi

13、se notedTPS51120UNITSVBST1, VBST2-0.3 to 36VBST1, VBST2 wrt LL-0.3 to 6Input voltage rangeVVIN, EN5-0.3 to 30SKIPSEL, TONSEL, EN1, EN2, CS1, CS2, V5FILT, VFB1, VFB2, EN3, VO1,-0.3 to 6VO2DRVH1, DRVH2-1 to 36DRVH1, DRVH2 (wrt LL)-0.3 to 6LL1, LL2-1 to 30Output voltage rangeVVREF2, VREG3, VREG5, PGOOD

14、1, PGOOD2, DRVL1, DRVL2, COMP1,-0.3 to 6COMP2PGND1, PGND2-0.3 to 0.3VREF21Source/sink currentVBST100mAVREG5, VREG3 (source only)200TAOperating ambient temperature range-40 to 85TstgStorage temperature-55 to 150 CTJJunction temperature-40 to 125Lead temperature 1.6 mm (1/16 inch) from case for 10 sec

15、onds255(1)Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated under recommended operatingconditions is not implied. Exposure

16、to absolute-maximum-ratedconditions for extended periods may affect device reliability. All voltagevalues are with respect to the network ground terminal unless otherwise noted.DERATING FACTORTA= 85 CTA 25 C POWER RATINGPACKAGEABOVE TA= 25 CPOWER RATING(W)(W/ C)(W)32-pin QFN(1)2.60.0261.032-pin QFN(

17、2)2.90.0291.2(1)JEDEC standard PCB.(2)Enhanced thermal conductance by 3 x 3 thermal vias beneath thermal pad.2名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 2 页，共 34 页 - - - - - - - - - RECOMMENDEDOPERATINGCONDITIONSTPS51120SLUS670AJULY 2005 REVISED AUGUST2005MINMAXU

18、NITInput voltage, V5FILT4.55.5VVBST1, VBST2-0.134VBST1, VBST2 wrt LL-0.15.5Input voltage rangeVIN, EN5-0.128VSKIPSEL, TONSEL, EN1, EN2, CS1, CS2, V5FILT, VFB1, VFB2, EN3-0.15.5VO1, VO2-0.15.5DRVH1, DRVH2-0.834DRVH1, DRVH2 (wrt LL)-0.15.5LL1, LL2-0.828Output voltage rangeVVREF2, VREG5, VREG3, PGOOD1,

19、 PGOOD2, DRVL1, DRVL2, COMP1,-0.15.5COMP2PGND1, PGND2-0.10.1VREF20.08Source/sink currentVBST50mAVREG5, VREF3 (source only)100Operating ambient temperature range, TA-4085 C3名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 3 页，共 34 页 - - - - - - - - - ELECTRICALCHARACTER

20、ISTICSTPS51120SLUS670A JULY 2005 REVISED AUGUST2005over operating free-air temperaturerange, VVIN= 12 V, VVREG5= VV5FILT= 5 V (unless otherwise noted)PARAMETERTEST CONDITIONSMINTYPMAXUNITSUPPLY CURRENTVIN current, VREG5=VREG3=NoLoad, EN3=EN5=FLOAT,IINCCAPSupply currentCurrent mode7501500EN1=EN2=5V,

21、CS=5V, COMPconnected to CapVIN current, VREG5=VREG3=NoIINNOCAPSupply currentLoad, EN3=EN5=FLOAT;D-CAP mode7001400EN1=EN2=5V, CS=5V, COMP=5VVIN current, VREG5=No Load AIIN5(STBY)Stand-by currentEN3=0V, EN5=FLOAT,5-V only3045EN1=EN2=0VIN current, VREG3=No LoadIIN3(STBY)Stand-by currentEN3=FLOAT, EN5=0

22、,3.3-V only1220EN1=EN2=0VIN current, VREG5=VREG3=VREF2=NoLoadIIN532(STBY)Stand-by current100150EN3=EN5=FLOAT,EN1=EN2=0IIN(SHDN)Shut down currentVIN current, EN3=EN5=EN1=EN2=0V1020VOUT and VREF2 VOLTAGESVFB2=5V, TA= 25 C, No Load3.2553.3003.345VFB2=5V, TA= 0 to 85 C, No Load3.2413.3003.359VFB2=5V, TA

23、= -40 to 85 C, No Load3.2343.3003.366VOUTOutput voltageVFB1=5V, TA= 25 C, No Load4.9355.0005.065VVFB1=5V, TA= 0 to 85 C, No Load4.9105.0005.090VFB1=5V, TA= -40 to 85 C, No Load4.9005.0005.100Adjustable mode output range1.05.5VADJOutput regulation voltageAdjustable mode1.00VAdjustable mode, TA= 25 C-

24、0.9%0.9%Output regulation voltage toler-VADJ TAdjustable mode, TA= 0 to 85 C-1.3%1.3%anceAdjustable mode, TA= -40 to 85 C-1.6%1.6%VVREF22-V output regulation voltageIVREF250 A, TA= 25 C1.972.002.03IVREF250 A, TA= 0 to 85 C1.962.04V2-V output regulation voltage toler-VVREF2TanceIVREF250 A, TA= -40 to

25、 85 C1.952.05VFBx=1.02V, COMPx=open0.02IVFBVFB input current AVFBx=1.02V, COMPx=5V0.02RDISCHARGDischarge switch resistanceVOx=0.5V, TA= 25 C1020?4名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 4 页，共 34 页 - - - - - - - - - TPS51120SLUS670AJULY 2005 REVISED AUGUST2005E

26、LECTRICALCHARACTERISTICS(continued)over operating free-air temperaturerange, VVIN= 12 V, VVREG5= VV5FILT= 5 V (unless otherwise noted)PARAMETERTEST CONDITIONSMINTYPMAXUNITVREG3 VOLTAGEVVREG3VREG3 Output Regulation VoltageIVREG3= 20 mA, 6V VIN 28V, TA= 25 C3.253.303.35IVREG3= 1 - 50 mA , 6V VIN 28V,

27、TA= 0 to 85 C3.213.37VVVREG3TVREG3 Output Voltage ToleranceIVREG3= 1 - 100 mA , 6V VIN 28V, TA= -40 to3.163.3985 CIVREG3VREG3 Output CurrentTA= 25 C, VREG3=3.14V(1)170mARising edge of VO2, VREG3 drops to VO2 voltage2.853.10VVREG3 Bootstrap SwitchVLDO3SWThresholdHysteresis120mVVREG3 Bootstrap Switch

28、Resist-RLDO3SW1.33.0?anceVREG5 VOLTAGEVVREG5VREG5 Output Regulation VoltageIVREG5= 20 mA, 6V VIN 28V, TA= 25 C4.9255.005.075VVREG5TVREG5 Output Voltage ToleranceIVREG5= 1 - 50 mA , 6V VIN 28V, TA= 0 to 85 C4.895.11VIVREG5= 1 - 100 mA , 6V VIN 3V772clksSLSSInternal Soft Start SlopeTA= 25 C, ENx3V, Sl

29、ope wrt. VFB(2)0.3V/msFCLKHK clock frequency230290350kHzUVLO/LOGICTHRESHOLDEN3, EN5, low to high0.40.60.8VENLDOHLDO enable thresholdHysteresis0.2VVENLDOFL3EN3 pullup voltageEN3 = FLOAT (OPEN)(2)1.7VENLDOFL5EN5 pullup voltageEN5= FLOAT (OPEN)(2)3.3IENLDOFLEN3, EN5 pullup currentVENx 0.5V1.54.0 AWake

30、up3.84.04.2VVUV(VREG5)VREG5 UVLO thresholdHysteresis100200300mVAuto-SKIP Mode Enabled00.7VSKIPSELSKIPSEL thresholdAuto-SKIP Mode Enabled, Faults Off1.32.2PWM-Only Mode Enabled2.75.5Fast Switching Frequency00.7VMedium Switching Frequency #21.32.2VTONSELTONSEL thresholdMedium Switching Frequency #12.7

31、3.0Slow Switching Frequency4.55.5SKIPSEL, TONSEL=0V13ISELSKIPSEL/TONSELinput current ASKIPSEL, TONSEL=5V12VENSWSTATEN1, EN2 SS Start VoltageBJT Base input, Switcher begins to Track ENx0.50.91.2V Logic High Level for Switcher Enable when usingVENSWENDEN1, EN2 SS End Voltage2.752.90Internal Softstart,

32、 0 C TA85 CIENSW1,2EN1, EN2 Pullup CurrentEN1, EN2=0.6V123 AVTHVFB1VFB1 threshold5.0V preset outputV5FILT -0.3VVTHVFB2VFB2 threshold3.3V preset outputV5FILT -0.3CURRENT SENSEResistor sense scheme , VPGND - VCSvoltage,VOCLCurrent limit threshold678093mVPGOOD=HiITRIPCS Sink CurrentRDS(ON)sense scheme,

33、 PGOOD=Hi, TA= 25 C91011 Appm/TCITRIPITRIPtemperature CoefficientRDS(ON)sense scheme, On the basis of 25 C4500C(2)Ensured by design. Not production tested.6名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 6 页，共 34 页 - - - - - - - - - TPS51120SLUS670AJULY 2005 REVISED A

34、UGUST2005ELECTRICALCHARACTERISTICS(continued)over operating free-air temperaturerange, VVIN= 12 V, VVREG5= VV5FILT= 5 V (unless otherwise noted)PARAMETERTEST CONDITIONSMINTYPMAXUNIT(VVREG5-CS-VPGND-LL) voltage, VVREG5-CS= 80mV,VOCLoffOCP Comparator Offset-10010RDS(ON)senseCurrent limit threshold set

35、tingVR(trip)VV5FILT-VCSvoltage30150mVrangeZero cross detection ComparatorVZCVPGNDx-VLLxvoltage, SKIPSEL=0V-515offsetPOWERGOODCOMPARATORPower Bad Threshold 7% 10% 13%VTH(PG)PGOOD ThresholdHysteresis 5%IPG(MAXPGOOD Sink CurrentPGOOD=0.5 V2.55.0mATPGDELPGOOD Delay TimerDelay for PGOOD in, clks =HKClock

36、256clksUNDERVOLTAGEand OVERVOLTAGEPROTECTIONVOVPVFBx OVP Trip ThresholdOVP detect110%115%120%TOVPDELVFBx OVP Delay Time2msUVP detect65%70%75%VUVPVFBx UVP Trip ThresholdHysteresis6%TUVPDELVFBx UVP Delay Timer clks =HKClock128clksTHERMAL SHUTDOWNShutdown temperature145TSDN1Thermal shutdown threshold C

37、Hysteresis107名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 7 页，共 34 页 - - - - - - - - - DEVICE INFORMATIONTPS51120SLUS670A JULY 2005 REVISED AUGUST2005TERMINALFUNCTIONSTERMINALI/ODESCRIPTIONNAMENO.COMP12OLoop compensationpin (error amplifier output). Connect RC from

38、 this pin to GND for proper loop compensationwith current mode operation. Tie this pin to V5FILT for D-CAP?mode operation.COMP27OCS123ICurrent sense comparator input (-) for resistor sensing scheme. Or, overcurrent trip setting input for RDS(on)current sense scheme if connected to V5FILT through the

39、 threshold setting resistor.CS218IDRVH127OHigh-side MOSFET gate drive output. Source 3.5 ? , sink 1.5 ?, LL-node referenced floating driver. Drivevoltage corresponds to VBST to LL voltage.DRVH214ODRVL125ORectifying (low-side) MOSFET gate drive output. Source 3.5 ? , sink 1.5 ?, PGND referenced drive

40、r. Drivevoltage is VREG5 voltage.DRVL216OEN129IChannel 1 and Channel 2 SMPS enable pins. Connect to 5 V to turn on with internal 3-ms soft-start. Slowersoft-start is possible by applying an external capacitor from each of these pins to ground to program ramp rate.EN212IVREG3, 3.3-V low dropout linea

41、r regulator enable pin. Connect to GND to disable. Float or tie to enabledEN310IVREG5 to turn on the regulator.VREG5, 5-V low dropout linear regulator enable pin. Connect to GND to disable. Float or tie to VBAT to turn onEN59Ithe regulator.GND5ISignal ground pin.LL126I/OHigh-side MOSFET gate driver

42、return. Also serve as current sense comparator input (-) for RDS(on)sensing, andinput voltage monitor for on-time control circuitryLL215I/OPGND124I/OGround return for rectifying MOSFET gate driver. Connect PGND2, PGND1 and GND strongly together nearthe source of the rectifying FET or the GND connect

43、ion of the current sense resistor. Also serve as currentPGND217I/Osense comparator input (+).PGOOD130OPower-good window comparator open drain output. Pull up with resistor to V5FILT or appropriate signalvoltage. Current capability is 5-mA. PGOOD goes high 1-ms after VFB is within specified limits. P

44、ower badPGOOD211O(terminal goes low) is within 10 s.SKIPSEL32ISkip and fault mode selection pin. Refer to Table 2TONSEL31IOn-time selection pin. Refer to Table 1 and Table 2.V5FILT20I5-V supply input for the entire control circuit. Should be provided from VREG5 via RC filter.VBST128ISupply Input for

45、 High-side MOSFET Driver. Connect capacitor from this pin to respective LL terminal. Aninternal PN diode is connected between VREG5 to each of these pins. User can add external schottky diode ifVBST213Iforward drop is critical to drive the power MOSFET.VFB13ISMPS feedback input. Connect the feedback

46、 resistor divider here for adjustable outputs. Tie these pins toV5FILT or for fixed output option. Refer to Table 2VFB26IVIN22ISupply Input for 5-V and 3.3-V linear regulator. Typically connected to VBAT.VO11IThese terminals serve four functions: on-time adjustment, output discharge, VREG5, VREG3 sw

47、itchover inputand feedback inputs for 5-V, 3.3-V fixed-output option. Connect to positive terminal of respective switch modeVO28Ipower supplysoutput capacitor.2-V reference output. Capable of 50- A, 2% over 0 - 85 C temperature range. Bypass to GND by 1-nFVREF24Oceramic capacitor. Tie this pin to GN

48、D disables both SMPS.3.3-V, 100-mA low dropout linear regulator output. Bypass to PGND by 10- F ceramic capacitor. Runs fromVREG319OVIN supply. Shuts off with EN3. Switches over to VO2 when 3.1 V or above is provided.5-V, 100-mA low dropout linear regulator output. Bypass to PGND by 10- F ceramic ca

49、pacitor. Runs from VINVREG521Osupply. Internally connected to VBST and DRVL. Shuts off with EN5. Switches over to VO1 when 4.8 V orabove is provided.8名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 8 页，共 34 页 - - - - - - - - - QFN PACKAGE(BOTTOM VIEW)32313029282726251

50、234567891011121314151624232221 20191817SKIPSELTONSELPGOOD1EN1VBST1DRVH1LL1DRVL1EN5EN3PGOOD2EN2VBST2DRVH2LL2DRVL2PGND1VO1COMP1VFB1VREF2GNDVFB2COMP2VO2CS1VINVREG5V5FILTVREG3CS2PGND2TPS51120SLUS670AJULY 2005 REVISED AUGUST20059名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - -