-
2022-09-24 23:33:15
HPA00001D - Low Power Current Mode Push-Pull PWM
The UCC3808A is a family of BiCMOS push-pull, high speed, low power, pulse width modulators. The UCC3808A contains all the control and drive circuitry required for off-line or DC-DC fixed frequency current mode switching with very few external parts to count on the power supply. The UCC3808A dual output driver stage is arranged in a push-pull configuration. Both outputs switch half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns depending on the timing capacitor and resistor values, limiting the duty cycle of each output stage to less than 50%.
Features Dual output driver stage current sense discharge transistors in push-pull configuration to improve dynamic response
130 - Wei a typical starting current
1 mA (typ) operating current to 1 MHz
Internal soft-start on-chip 2-MHz gain-bandwidth error amplifier at chip VDD clamps output 500 mA peak source current driver stage, 1 peak sink current