UCC3580Q-3 ,1ELECTRICAL CHARACTERISTICSUnless otherwise stated, all specifications are over the full temperature ..
UCC3581D ,Micropower Voltage Mode PWMMAXIMUM RATINGSSupply Voltage (IDD ≤ 10mA). . . . . . . . . . . . . . . . . . . . . . . . 15VDIL-14 ..
UCC3583D ,Switch Mode Secondary Side Post RegulatorELECTRICAL CHARACTERISTICS:Unless otherwise stated, these specifications apply for T = –55°Cto125°C ..
UCC3583D ,Switch Mode Secondary Side Post Regulatorfeatures an undervoltage lockout (UVLO)• Average Current Limiting Loopcircuit, a soft start circuit ..
UCC3583D ,Switch Mode Secondary Side Post RegulatorFEATURES DESCRIPTION• Precision Secondary Side Post The UCC3583 is a synchronizable secondary side ..
UCC3583D ,Switch Mode Secondary Side Post RegulatorBLOCK DIAGRAMUDG-96201-2Note: Pin connections shown for 14-pin packages.SLUS299B - OCTOBER 1998 - R ..
UPA2452 ,Nch enhancement-type MOSFET (dual-drain-common-type)features a low on-state resistance and 3 4excellent switching characteristics, and is suitable for
UPA2452TL-E1 ,Nch enhancement-type MOSFET (dual-drain-common-type)DATA SHEETMOS FIELD EFFECT TRANSISTORµ PA2452N-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHING ..
UPA2502TM-E2 ,N-ch enhancement-type MOSFETDATA SHEETMOS FIELD EFFECT TRANSISTORµ PA2502N-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHING ..
UPA2700 ,Nch enhancement-type MOS FETDATA SHEETMOS FIELD EFFECT TRANSISTOR µµµµ PA2700GRSWITCHINGN-CHANNEL POWER MOS FETDESCRIPTIO ..
UPA2700GR-E1 ,Nch enhancement-type MOS FETELECTRICAL CHARACTERISTICS (TA = 25°C, All terminals are connected.)CHARACTERISTICS SYMBOL TEST CON ..
UPA2700GR-E1 ,Nch enhancement-type MOS FETFEATURES• Low on-state resistance6.0 ±0.314RDS(on)1 = 5.3 mΩ MAX. (VGS = 10 V, ID = 9.0 A)4.45.37 M ..
UCC3580Q-3
1
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
