AS2916 - Astec Semiconductor

AS2916 PWM Controller

The AS2916 is a dual, full featured, pulse width modulation controller. The second controller is intended to run the auxiliary supply. Both controllers share common oscillator and power up logic. Based on an improved AS3842, the AS2916 provides additional features that reduce component count and improve specifications in a wide range of power supply designs..

Features

that reduce component count and improve specifications in a wide range of power supply designs. The added functionality also includes bulk voltage sensing, overvoltage input and soft-start. The PWM function is controlled by the current sense comparator for normal current mode control and a second comparator for voltage mode soft-start. A buffered RAMP signal is available for slope compensation without loading the oscillator. The output stage is a high current totem pole output that sees only 140 ns delay from the PWM comparators. The AS2916 requires less than 25 µA of startup current. The unde.