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LR2257

AC/DC Current Mode PWM

LR2257 Features

* of over current and over voltage protection mechanisms Delivering up to 3W yet consumes, the typical application of the device will include: z Battery Charger, such as handset phone z Power Adapter z Offline Power Generator z Etc. ¾ Lowest Total Cost Solution ¾ Low Power for Green Environments Prot

LR2257 General 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.

LR2257 Datasheet (395.25 KB)

Preview of LR2257 PDF

Datasheet Details

Part number:

LR2257

Manufacturer:

LRC

File Size:

395.25 KB

Description:

Ac/dc current mode pwm.
LESHAN RADIO COMPANY, LTD. LR2257 AC/DC Current Mode PWM power management controller The LR2257 AC

*DC is a high efficiency current-mode PWM.

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TAGS

LR2257 Current Mode PWM LRC

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