• Product Introduction

UC2572 

Negative output reverse pulse width modulator

illustrate   UC3572 is a negative output sweepback pulse width modulator, which regulates the positive input voltage and the negative output voltage. The chip is optimized to employ an external PMOS switch in a single flyback switch inductor load. The block plot consists of a high-precision reference, voltage mode operation of the error amplifier, an oscillator, a PWM comparator with latching logic, and a 0.5A peak gate driver configuration. The UC3572 includes an undervoltage lockout circuit to ensure sufficient input supply voltage in the presence of a pulse current limit for a pulse before any conversion activity can occur. The output current can be detected and is limited to determining the maximum user.   characteristic   A simple single inductor produces a reverse negative voltage PWM External PMOS switch on the hard drive UVLO circuit is included Including the pulse passing through the pulse current limit Low 50uA sleep mode current