CP2122 Datasheet PDF - CHIP Step-Up White-LED Driver Specs

CP2122 - Step-Up White-LED Driver

Datasheet Summary

Description

The CP2122 is a step-up DC/DC converter specifically designed for driving white LEDs with a constant current.

Operation at a fixed switching frequency of 1.4MHz allows the device to be used with small value external ceramic capacitors and inductors.

Features

an internal soft start to eliminate inrush current during startup. Equipped with built-in over-voltage protection function, the device enters a very low power operating mode during the “OPEN LED” fault conditions. The CP2122 is available in SOT23-5L package. SOT23-5L -40℃~85℃ Features y y y y y y y y Switch current limit 700mA Drives LED strings up to 34V Up to 84% efficiency Soft start “in-rush” current limiting Fast 1.4 MHz switching frequency Built-in over-voltage protection Shutdown curren.

Datasheet Details

Part number	CP2122
Manufacturer	CHIP
File Size	146.52 KB
Description	Step-Up White-LED Driver
Datasheet	CP2122 Datasheet
Additional preview pages of the CP2122 datasheet.

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Full PDF Text Transcription

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Product Brief CP2122 V1.0 LED Driver Series Step-Up White-LED Driver for Mid-size or Large Panel General www.datasheet4u.com Description The CP2122 is a step-up DC/DC converter specifically designed for driving white LEDs with a constant current. Operation at a fixed switching frequency of 1.4MHz allows the device to be used with small value external ceramic capacitors and inductors. Series connection of LEDs provides equal LED current which results in uniform brightness. 300mV feedback voltage minimizes the power loss in the current setting resistor for better efficiency. The CP2122 high-voltage output stage is ideal for driving parallel strings of up to seven white LEDs in series or up to 34V. The CP2122 features an internal soft start to eliminate inrush current during startup.

Published: May 22, 2009 |