Description
The HV9608 provides a single chip, optimized peak current mode control solution for design of high performance PWM converters using the active-clamp transformer flux reset. Due to its programmable slope compensation feature, the HV9608 allows operation beyond 50% duty cycle. Zero voltage switching can be accomplished through using the programmable deadtime timers. The switching frequency can be programmed from 25kHz to 800kHz using a single resistor. The internal high voltage startup circuit can ensure start-up from the input voltage from 12V to 250V.

Features
❐ Peak current-mode PWM Controller
❐ Two complementary MOSFET drivers
❐ Programmable deadtime between drivers
❐ High current gate drivers for main and auxiliary outputs
❐ Internal high voltage (12V to 250V) start-up regulator
❐ Programmable VIN undervoltage lockout and hysteresis
❐ VDD supply operation from 7.8V to 12V
❐ Fixed frequency PWM operation from 25KHz to 800KHz
❐ >50% duty cycle operation (up to 95%)
❐ Programmable slope compensation
❐ Programmable max duty-cycle/volt-second clamp
❐ Capacitor programmable soft-start
❐ Cycle-by-cycle current limiting
❐ 100ns current sense leading edge blanking
❐ 2 MHz error amplifier

Applications
❐ Networking
❐ Telecommunication Systems and Terminals
❐ IEEE 802.3af PoE PD Devices
❐ SANS, Servers & Workstations
❐ High Efficiency Instrumentation Supplies
❐ High Efficiency Supplies for Portable Equipment