AN4003

Features:

• Complete PWM control and house keeping circuitry
• Few external components
• Precision voltage reference trimmed to 2%
• Dual output for push-pull operation
• Each output TR for 200mA sink current
• Variable duty cycle by dead time control
• Soft start capability by using dead time control
• Double pulse suppression logic
• Over voltage protection for 3.3V / 5V / 12V
• Under voltage protection for 3.3V / 5V / 12V
• One more external input for various protection (PT)
• Remote on/off control function (PS-ON)
• Latch function controlled by remote and protection input
• Power good signal generator with hysteresis
• 22-Pin dual in-line package


Specifications

Characteristic	Symbol	Value	Unit
Supply voltage	VCC	40	V
Collector output voltage	VC1, VC2	40	V
Collector output current	IC1, IC2	200	mA
Power dissipation	PD	1	W
Operating temperature	TOPR	-25 to 85	°C
Storage temperature	TSTG	-65 to 150	°C

Description

The AN4003 is a fixed-frequency improved-performance pulse-width modulation control circuit with complete housekeeping circuitry for use in the secondary side of SMPS (Switched mode power supply). AN4003 contains various functions, which are precision voltage reference, over voltage protection, under voltage protection, remote on/off control, power good signal generator and etc.