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AMC3844B - (AMC3842B - AMC3845B) CURRENT MODE PWM CONTROLLER

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.

Features

  • Low Start-Up current (max. 200µA) Optimized for Off-Line and DC-to-DC Converters Maximum Duty Cycle U. V. L. O. with Hysteresis Operating Frequency Up to 500KHz Internal Trimmed Bandgap Reference High Current Totem Pole Output Error Amplifier With Low Output Resistance Available in 8-Pin Plastic DIP and Surface Mount 14-Pin S. O. I. C. Identical pin assignment to earlier UC384X series.

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Datasheet Details

Part number AMC3844B
Manufacturer ADDtek
File Size 253.95 KB
Description (AMC3842B - AMC3845B) CURRENT MODE PWM CONTROLLER
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Full PDF Text Transcription

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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.
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