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LR745

Part Number	LR745
Manufacturer	Microchip
Description	High-Input Voltage SMPS Start-up
Published	Dec 1, 2016
Detailed Description	LR745 High-Input Voltage SMPS Start-up Features • Accepts inputs from 35 to 450V • Output current limiting • For PWM IC...
Datasheet	LR745 PDF File

Overview

LR745 High-Input Voltage SMPS Start-up Features • Accepts inputs from 35 to 450V • Output current limiting • For PWM ICs with start-up threshold voltage of 13.
9 - 18.
0V • Very low power consumption after start-up Applications • Notebook and laptop computers • Telecommunication power supplies • Battery chargers • Motor controllers Description LR745 is a high input voltage SMPS start-up circuit.
LR745 is ideally suited for use with industry standard low-voltage, Pulse-Width Modulation (PWM) ICs having start thresholds of 13.
9 to 18.
0V.
It allows the PWM ICs to be operated from rectified 120 or 240VAC lines, and eliminates the use of power resistors often used for this purpose.
The internal c...

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