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LR2257 - AC/DC Current Mode PWM

The LR2257 by LRC is a AC/DC Current Mode PWM. Below is the official datasheet preview.

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Official preview page of the LR2257 AC/DC Current Mode PWM datasheet (LRC).

Datasheet Details

Part number LR2257
Manufacturer LRC
File Size 395.25 KB
Description AC/DC Current Mode PWM
Datasheet download datasheet LR2257-LRC.pdf
Additional preview pages of the LR2257 datasheet.

LR2257 Product details

Description

Pin Symbol Pin Description 1 FB Feedback input 2,3 NC Test Pin 4 VDD Power Supply 5,6 SW Power Transistor output 7,8 GND Ground Note: Test2 should connect to Test3 while in application 2/9 + - LO HI Working Principle HI HV DC LO 1M GND SW LR2257 12 3 4 PC817A 12 56 7 8 LESHAN RADIO COMPANY, LTD.LR2257 1 T=114 2 1 1N5817 T=8 2 1 T=24 100uF 10V 2 1N4148 IC2 + 6.2V DC - VDD FB 1N4148 10uF 10V 22uF 35V D6 5.1V 2% T1 T2 Block Diagram FB VDD STARTER OSCI

Features

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