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AMC3843B

ADDtek
Part Number AMC3843B
Manufacturer ADDtek
Description (AMC3842B - AMC3845B) CURRENT MODE PWM CONTROLLER
Published Jun 25, 2008
Detailed Description AMC3842B/43B/44B/45B www.addmtek.com DESCRIPTION The AMC3842B/43B/44B/45B are fixed frequency current-mode PWM controlle...
Datasheet PDF File AMC3843B PDF File

AMC3843B
AMC3843B

Overview
AMC3842B/43B/44B/45B www.
addmtek.
com DESCRIPTION The AMC3842B/43B/44B/45B are fixed frequency current-mode PWM controllers specially designed for OFF-Line switching power supply and DC-to-DC converters with a minimum number of external components.
These www.
DataSheet4U.
com devices feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem pole output which is suitable for driving MOSFETs.
The under voltage lock-out (U.
V.
L.
O.
) is designed to operated with 200µA start-up current in typical, allowing an efficient bootstrap supply voltage design.
The U.
V.
L.
O.
thresholds for the AMC3842B/44B are 16V (on) and 10V (off), which are ideal for off-line applications.
The corresponding typical threshold for the AMC3843/45BB is 8.
4V (on) and 7.
6V (off).
The AMC3842B/43B can operate within 100% duty cycle and the AMC3844B/45B can operate within 50% duty cycle.
APPLICATIONS „ „ „ „ „ „...


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