AS2916
DESCRIPTION
The AS2916 is a dual, full featured, pulse width modulation controller. The second controller is intended to run the auxiliary supply. Both controllers share mon oscillator and power up logic. Based on an improved AS3842, the AS2916 provides additional features that reduce ponent 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 parator for normal current mode control and a second parator for voltage mode soft start. A buffered RAMP signal is available for slope pensation without loading the oscillator. The output stage is a high current totem pole output that sees only 140 ns delay from the PWM parators. The AS2916 requires less than 25 µA of startup current. The undervoltage lockout (UVLO) thresholds are nominally 13.5 V for turn on and 7.5 V for turn off. The oscillator discharge current is trimmed to...
