Current Mode Push-Pull PWM With Programmable Slope Compensation

The UCC38083 4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs Switch at half the Oscillator frequency using a toggle Flip-Flop The dead time between the two outputs is typically 110 ns, limiting each output?s duty cycle to less than 50%.
The new UCC3808x family is based on the UCC3808A architecture. The major differences include the addition of a programmable slope compensation ramp to the CS signal and the removal of the error Amplifier The current flowing out of the ISET pin through an external resistor is monitored internally to set the magnitude of the slope compensation function. This device also includes an internal discharge Transistor from the CS pin to ground, which is activated at each Clock cycle after the pulse is terminated. This discharges any Filter capacitance on the CS pin during each cycle and helps minimize Filter capacitor values and Current Sense delay.
The UCC38083 and the UCC38084 devices have a typical soft-start interval time of 3.5 ms while the UCC38085 and the UCC38086 has less than 100 s for applications where internal soft-start is not desired.
The UCC38083 and the UCC38085 devices have the turn on/off thresholds of the 12.5 V / 8.3 V, while the UCC38084 and the UCC38086 has the turn on/off thresholds of 4.3 V / 4.1 V. Each device is offered in 8-pin TSSOP (PW), 8-pin SOIC (D) and 8-pin PDIP (P) packages.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UCC38084DG4 Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-SOIC 0 to 70
UCC38084D Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-SOIC 0 to 70
UCC38084PG4 Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-PDIP 0 to 70
UCC38084P Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-PDIP 0 to 70
UCC38084PW Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-TSSOP 0 to 70
UCC38084PWG4 Texas Instruments 1A SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, TSSOP-8
UCC38084PWRG4 Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-TSSOP 0 to 70
UCC38084PWR Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-TSSOP 0 to 70
UCC38084DRG4 Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-SOIC 0 to 70
UCC38084DR Texas Instruments Current Mode Push-Pull PWM With Programmable Slope Compensation 8-SOIC 0 to 70
UCC38084 's PackagesUCC38084 's pdf datasheet
UCC38084D SOIC
UCC38084DG4 SOIC
UCC38084DR SOIC
UCC38084DRG4 SOIC
UCC38084P PDIP
UCC38084PG4 PDIP
UCC38084PW TSSOP
UCC38084PWG4 TSSOP
UCC38084PWR TSSOP
UCC38084PWRG4 TSSOP




UCC38084 Pinout, Pinouts
UCC38084 pinout,Pin out
This is one package pinout of UCC38084,If you need more pinouts please download UCC38084's pdf datasheet.

UCC38084 Application circuits
UCC38084 circuits
This is one application circuit of UCC38084,If you need more circuits,please download UCC38084's pdf datasheet.


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