UCC3570D Datasheet PDF - TI

●DESCRIPTION

●The UCC1570 family of pulse width modulators is intended for application in isolated switching supplies using primary side control and a voltage mode feedback loop. Made with a BiCMOS process, these devices feature low startup current for efficient off-line starting with a bootstrapped low volt age supply. Operating current is also very low; yet these devices maintain the ability to drive a power MOSFET gate at frequencies above 500kHz.

●FEATURES

●•Low Power BiCMOS Process

●•85µA Start-up Current

●•1mA Run Current

●•1A Peak Gate Drive Output

●•Voltage Feed Forward

●•Programmable Duty Cycle Clamp

●•Optocoupler Interface

●•500kHz Operation

●•Soft Start

●•Fault Counting Shutdown

●•Fault Latch Off or Automatic Restart