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AS2916

Part Number	AS2916
Manufacturer	Astec Semiconductor
Description	PWM Controller
Published	Oct 2, 2005
Detailed Description	SEMICONDUCTOR AS2916 PWM Controller Description The AS2916 is a dual, full featured, pulse width modulation controller....
Datasheet	AS2916 PDF File

Overview

SEMICONDUCTOR AS2916 PWM Controller 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 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.
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 undervoltage lockout (UVLO) thresholds are nominally 13.
5 V for turn-on and 7.
5 V for turn...

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