GENERAL DESCRIPTION
Unlike conventional PWM circuits, the phase modulation technique allows for zero voltage switching (ZVS) transitions and square wave drive across the transformer. Both cycle-by-cycle current limit, integrating fault detection, and soft start reset are provided. The undervoltage lockout circuit features a 1.5V hysteresis with a low starting current to allow off-line start up with a bleed resistor. A shutdown function powers down the IC, putting it into a low quiescent state. The circuit can be operated at frequencies up to 1MHz. The ML4828 contains four high current CMOS outputs which feature high slew rate with low cross conduction. FEATURES
s s s s s s s 5V BiCMOS for low power and high frequency (1MHz) operation Full bridge phase modulation zero voltage switching circuit with independent programmable delay times Current or voltage mode operation capability Cycle-by-cycle current limiting with integrating fault detection and restart delay Can be externally synchron...
Micro Linear
