UCC2580DTR-4 ,1ELECTRICAL CHARACTERISTICSUnless otherwise stated, all specifications are over the full temperature ..
UCC2580DTR-4 ,1Features withgrammed maximum volt-second limit. The generated clock from the oscilla-Latched Shutdo ..
UCC2580N-1 , Single Ended Active Clamp/Reset PWM
UCC2580N-3 , Single Ended Active Clamp/Reset PWM
UCC2580N-3 , Single Ended Active Clamp/Reset PWM
UCC2580N-4 , Single Ended Active Clamp/Reset PWM
UP04113 ,Composite DeviceAbsolute Maximum Ratings T = 25°Ca3: Collector (Tr2) 6: Collector (Tr1)SSMini6-F1 PackageParameter ..
UP04113 ,Composite DeviceComposite TransistorsUP0411x SeriesSilicon PNP epitaxial planar typeUnit: mm+0.050.20(0.30) 0.10±0. ..
UP04116 ,Composite DeviceFeatures• Two elements incorporated into one package5˚123(Transistors with built-in resistor)(0.50) ..
UP04211 ,Composite DeviceAbsolute Maximum Ratings T = 25°Ca6 5 4Parameter Symbol Rating UnitRR1 2Collector-base voltage (Em ..
UP04213 ,Composite DeviceComposite TransistorsUP0421x SeriesSilicon NPN epitaxial planar typeUnit : mm+0.050.20(0.30) 0.10±0 ..
UP04214 ,Composite DeviceFeatures• Two elements incorporated into one package5˚123(Transistors with built-in resistor)(0.50) ..
UCC2580D-4-UCC2580DTR-4
Single Ended Active Clamp/Reset PWM
UCC1580-1,-2,-3,-4
UCC2580-1,-2,-3,-4
UCC3580-1,-2,-3,-4
FEATURESProvides Auxiliary Switch Activation
Complementaryto Main Power
Switch Drive
Programmable deadtime (Turn-on
Delay) Between Activationof Each
Switch
Voltage Mode Control with
Feedforward Operation
Programmable Limits for Both
Transformer Volt- Second Product
and PWM Duty Cycle
High Current Gate Driver for Both
Main and Auxiliary Outputs
Multiple Protection Features with
Latched Shutdown and Soft Restart
Low Supply Current (100 �A Startup,
1.5 mA Operation)
BLOCK DIAGRAM
DESCRIPTIONThe UCC3580 familyof PWM controllersis designedto implementa variety active clamp/reset and synchronous rectifier switching converter topolo-
gies. While containingall the necessary functions for fixed frequency, high
performance pulse width modulation, the additional featureof this designis
the inclusionof an auxiliary switch driver which complements the main
power switch, and witha programmable deadtimeor delay between each
transition. The active clamp/reset technique allows operationof single
ended converters beyond 50% duty cycle while reducing voltage stresses the switches, and allowsa greater flux swing for the power transformer.
This approach also allowsa reductionin switching lossesby recovering en-
ergy storedin parasitic elements such as leakage inductance and switch
capacitance.
The oscillatoris programmed with two resistors anda capacitorto set
switching frequency and maximum duty cycle. A separate synchronized
ramp providesa voltage feedforward pulse width modulation anda pro-
grammed maximum volt-second limit. The generated clock from the oscilla-
tor contains both frequency and maximum duty cycle information.
(continued)Single Ended Active Clamp/Reset PWM
