UCC2808APW-2 ,1Support & ReferenceProduct Order Tools &TechnicalCommunityDesignFolder Now Documents SoftwareUCC280 ..
UCC2808APW-2G4 ,Low-Power Current-Mode Push-Pull PWM 8-TSSOP -40 to 85 SLUS456E–APRIL 1999–REVISED DECEMBER 20165 Pin Configuration and FunctionsD or N PackagePW Package ..
UCC2808APWTR-2 ,1Pin Functions (continued)PIN(1)TYPE DESCRIPTIONNAME SOIC, PDIP TSSOPThe oscillator programming pin. ..
UCC2808AQDR-1Q1 ,1features built-in full-cycle soft start. Soft start is implemented as a clamp on themaximum COMP vo ..
UCC2808AQDR-2G4Q1 ,Automotive Catalog Low Power Current Mode Push-Pull PWM 8-SOIC -40 to 125ELECTRICAL CHARACTERISTICS(1)T = –40°C to 125°C for the UCC2808A-xQ1, V = 10 V , 1-μF capacitor fro ..
UCC2808AQDR-2Q1 ,1features built-in full-cycle soft start. Soft start is implemented as a clamp on themaximum COMP vo ..
UPA101G-E1 ,12ⅴ8 CROSSPOINT SWITCH WITH CONTROL MEMORYApplications include a multiplier,double balanced mixer, phase detector, or AGC circuit. The two p ..
UPA102G ,Ultra-high-frequency NPN transistor arrayapplicationsinclude: pulse pattern generators, oscillators, differential amps, high speed comparato ..
UPA102G-E1 ,Ultra-high-frequency NPN transistor arrayFEATURES• TWO BUILT-IN DIFFERENTIAL AMPLIFIER CIRCUITS: (Each Transistor has fT 9 GHz)• OUTSTANDING ..
UPA103G ,HIGH FREQUENCY NPN TRANSISTOR ARRAYFEATURES• FIVE MONOLITHIC 9 GHz fT TRANSISTORS:Two of these use a common emitter pin and can be use ..
UPA103G-E1 ,HIGH FREQUENCY NPN TRANSISTOR ARRAYFEATURES• FIVE MONOLITHIC 9 GHz fT TRANSISTORS:Two of these use a common emitter pin and can be use ..
UPA103G-E1 ,HIGH FREQUENCY NPN TRANSISTOR ARRAYAPPLICATIONSThe μPA103 is a user configurable Silicon bipolar transistor array consisting of a comm ..
UCC2808AD-2-UCC2808ADTR-2-UCC2808AN-2-UCC2808APW-2-UCC2808APW-2G4-UCC2808APWTR-2
Low-Power Current-Mode Push-Pull PWM
VIN
VCC GND
VFB
COMP
OUT1
OUT2
ISOLATED
FEEDBACK
LM5030
VIN VOUT
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UCC2808A-1, UCC2808A-2, UCC3808A-1, UCC3808A-2SLUS456E –APRIL 1999–REVISED DECEMBER 2016
UCCx808A Low Power Current Mode Push-Pull PWM Features Dual Output Drive Stagesin Push-Pull
Configuration Current Sense Discharge Transistorto Improve
Dynamic Response 130-μA Typical Starting Current 1-mA Typical Run Current Operationto1 MHz Internal Soft Start On-Chip Error Amplifier With 2-MHz Gain
Bandwidth Product On-Chip VDD Clamping Output Drive Stages Capableof 500-mA Peak-
Source Current, 1-A Peak-Sink Current
Applications High-Efficiency Switch-Mode Power Supplies Telecom DC-to-DC Converters Point-of-Load Power Modules Low-Cost Push-Pull and Half-Bridge Applications
DescriptionThe UCCx808A devices area family of BiCMOS
push-pull, high-speed, low-power, pulse-width
modulators. The UCCx808A containsallof the control
and drive circuitry required for off-lineor DC-to-DC
fixed frequency current-mode switching power
supplies with minimal external parts count.
The UCCx808A dual output drive stages are
arrangedina push-pull configuration. Both outputs
switchat half the oscillator frequency usinga toggle
flip-flop. The dead time between the two outputsis
typically 60nsto 200ns depending on the valuesof
the timing capacitor and resistors, thus limiting each
output stage duty cycleto less than 50%.
The UCCx808A family offersa varietyof package
options, temperature range options, and choiceof
undervoltage lockout levels. The family has UVLO
thresholds and hysteresis options for off-line and
battery-powered systems.
The UCCx808A is an enhanced version of the
UCC3808 family. The significant differenceis that the versions feature an internal discharge transistor
from the CS pinto ground, whichis activated each
clock cycle during the oscillator dead time. The
feature discharges any filter capacitance on the CS
pin during each cycle and helps minimize filter
capacitor values and current sense delay.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Diagram
