UCC3895DWTRG4中文资料

BiCMOSAdvanced Phase ShiftPWMController

FEATURES

Programmable Output Turn-on Delay

UCC1895UCC2895

UCC3895

DESCRIPTION

TheUCC3895isaphaseshiftPWMcontrollerthatimplementscontrolofafull-bridgepowerstagebyphaseshiftingtheswitchingofonehalf-bridge

Adaptive Delay Set

withrespecttotheother.Itallowsconstantfrequencypulse-widthmodula-BidirectionalOscillatorSynchronizationtioninconjunctionwithresonantzero-voltageswitchingtoprovidehigheffi-ciencyathighfrequencies.Thepartcanbeusedeitherasavoltagemode

Capability for Voltage Mode or Current

or current mode controller.

Mode Control

WhiletheUCC3895maintainsthefunctionalityoftheUC3875/6/7/8family

Programmable Soft Start/Soft StopandUC3879,itimprovesonthatcontrollerfamilywithadditionalfeaturesand Chip Disable via a Single Pin

suchasenhancedcontrollogic,adaptivedelayset,andshutdowncapabil-ity.SinceitisbuiltinBCDMOS,itoperateswithdramaticallylesssupply0% to 100% Duty Cycle Control

currentthanit’sbipolarcounterparts.TheUCC3895canoperatewitha

7MHz Error Amplifier

maximum clock frequency of 1MHz.

Operation to 1MHzTheUCC3895andUCC2895areofferedinthe20pinSOIC(DW)pack-age,20pinPDIP(N)package,20pinTSSOP(PW)package,and20pin

PLCC(Q).TheUCC1895isofferedinthe20pinCDIP(J)package,and20pinCLCCpackage (L).

Low Active Current Consumption(5mA Typical @ 500kHz) Very Low Current ConsumptionDuringUndervoltageLock-out(150mA typical)

SIMPLIFIED APPLICATION DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (IDD< 10mA). . . . . . . . . . . . . . . . . . . . . . .17VSupply Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30mAREF current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15mAOUT Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100mAAnalog inputs

(EAP,EAN,EAOUT, RAMP,

SYNC, ADS, CS, SS/DISB). . . . . . . . . . .–0.3V to REF+0.3VPower Dissipation at TA=+25°C (N Package). . . . . . . . . . . .1WPower Dissipation at TA=+25°C (D Package). . . . . . . .650mWStorage Temperature. . . . . . . . . . . . . . . . . . .–65°C to +150°CJunction Temperature. . . . . . . . . . . . . . . . . . .–55°C to +125°CLead Temperature (soldering, 10 sec). . . . . . . . . . . . . .

+300°C

CONNECTION DIAGRAMS

TEMPERATURE & PACKAGE SELECTIONTABLE

UCC1895UCC2895UCC3895

TEMPERATURE

RANGE

–55°C to +125°C–40°C to +85°C0°C to +70°C

PACKAGESUFFIXJ, L

DW, N,PW, QDW, N,PW, Q

ORDERING INFORMATIONPACKAGESUFFIXTEMPERATURERANGE

RDELCD=10kW,CREF=0.1mF,CVDD=1.0mF, no load at outputs. TA=TJ. TA= 0°C to 70°C for UCC3895x, –40°C to +85°C forUCC2895x, and –55°C to +125°C for UCC1895x.

PARAMETER

UVLOSectionStart ThresholdStop ThresholdHysteresisSupply CurrentStart-up CurrentIDDActive

VDDClamp Voltage

IDD= 10mA

16.5

VDD= 8V

150517.5

250618.5

10.28.21.0

1192.0

11.89.83.0

TEST CONDITIONS

MIN

TYP

ELECTRICAL CHARACTERISTICS:Unless otherwise specified,VDD=12V, RT=82kW, CT=220pF,RDELAB=10kW,

MAXUNITS

VVVmAmAV

RDELCD=10kW,CREF=0.1mF,CVDD=1.0mF, no load at outputs. TA=TJ. TA= 0°C to 70°C for UCC3895x, –40°C to +85°C forUCC2895x, and –55°C to +125°C for UCC1895x.

PARAMETER

Voltage Reference SectionOutput Voltage

TJ= 25°C

10V <VDD< 17.5V, 0mA <IREF< 5mA,Temperature

Short Circuit CurrentError Amplifier Section

Common Mode Input Voltage RangeOffset Voltage

Input Bias Current (EAP,EAN)EAOUTVOHEAOUTVOL

EAOUTSource CurrentEAOUTSink CurrentOpen Loop DC GainUnity Gain BandwidthSlew Rate

No LoadComparatorTurn-Off ThresholdNo LoadComparatorTurn-On ThresholdNo LoadComparatorHysteresisOscillator SectionFrequencyTotal VariationSYNCVIHSYNCVILSYNCVOHSYNC VOL

SYNC Output Pulse WidthRT VoltageCT Peak VoltageCT Valley VoltageCT Valley VoltagePWMComparatorSection

EAOUTto RAMP Input Offset VoltageMinimum Phase Shift

(OUTAtoOUTC,OUTBtoOUTD)RAMP toOUTC/OUTDDelayRAMP Bias CurrentRAMP Sink CurrentCurrent Sense SectionCS Bias CurrentPeak Current ThresholdOvercurrentThresholdCS to Output Delay

CS from 0 to 2.3V,DELAB=DELCD= REF0 < CS , 2.5V, 0 < ADS < 2.5V

–4.51.902.4

2.002.575

202.102.6110

mAVVns

RAMP = 0V,DELAB=DELCD= REFRAMP = 0V,EAOUT= 650mV (Note 1)RAMP from 0V to 2.5V,EAOUT= 1.2V,DELAB=DELCD= REF (Note 2)RAMP < 5V, CT < 2.2VRAMP = 5V, CT < 2.6V

–512

19

0.720.00

0.850.8570

1.051.401205

V%nsmAmA

UCC2895, UCC3895UCC1895

ISYNC= –400mA, CT = 2.6VI= 100mA, CT = 0V

SYNC Load = 3.9kWand 30pF in parallel

2.92.250.00.0

TJ= 25°C

Line, Temperature (Note 3)

2.051.854.10.0473

5002.52.101.904.50.58532.350.20.2

52752.251.955.01.01353.12.500.40.6

kHz%VVVVnsVVVV

(Note 3)

EANfrom 1V to 0V,EAP= 500mV,EAOUTfrom 0.5V to 3.0V, (Note 3)EAP–EAN= 500mV,I= –0.5mAEAP–EAN= –500mV,IEAOUT= 0.5mAEAP–EAN= 500mV,EAOUT= 2.5V

EAP–EAN= –500mV,EAOUT=2.5V, (Note 4)

–0.1–7–14.001.02.5755.01.50.450.550.035

4.50.21.54.5857.02.20.500.600.100

0.550.690.1653.6715.00.4

VmVmAVVmAmAdBMHzV/msVVV

REF = 0V,TJ= 25°C

4.944.8510

5.00520

5.065.15

VVmA

TEST CONDITIONS

MIN

TYP

ELECTRICAL CHARACTERISTICS:Unless otherwise specified,VDD=12V, RT=82kW, CT=220pF,RDELAB=10kW,

MAXUNITS

RDELCD=10kW,CREF=0.1mF,CVDD=1.0mF, no load at outputs. TA=TJ. TA= 0°C to 70°C for UCC3895x, –40°C to +85°C for

UCC2895x, and –55°C to +125°C for UCC1895x.

PARAMETER

Soft Sta …… 此处隐藏：19007字，全部文档内容请下载后查看。喜欢就下载吧 ……