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CP2126 - White LED Step-up Converter

Datasheet Summary

Features

  • Inherently matched LED current High efficiency: 85% typical Drives up to four LEDs from a 3.2V supply 20V stable bipolar switch Fast 900KHz switching frequency Uses tiny 1mm tall inductors Requires only 0.22uF output capacitor Operating Industrial temperature range: -40℃ ~ 85℃ SOT23-5L package VIN CS LX 5 3 95mV + + RC CC 1 VREF 1.25V A1 - A2 R S Q Q1 + + Ramp Generator Power Down 900KHz Oscillator A3 - 0.2 Ohm 2 GND SHDN 4 Copyright ©2004 Chiphomer Technology Limited Page.

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Datasheet Details

Part number CP2126
Manufacturer CHIP
File Size 96.71 KB
Description White LED Step-up Converter
Datasheet download datasheet CP2126 Datasheet
Additional preview pages of the CP2126 datasheet.

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Full PDF Text Transcription

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CP2126 Product Brief DC/DC Series CP2126_PB_ ENG _Rev1.0 March,2004 Step-Up White-LED Driver www.datasheet4u.com OVERVIEW The CP2126 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four white LEDs in series from a Li-Ion cell. Series connection of LEDs provides identical LED currents resulting in uniform brightness. The CP2126 switches at 900KHz， allowing the use of tiny components. The external capacitor can be as small as 0.22uF, saving space and cost versus alternative solutions. A low 95mV feedback voltage minimizes power loss in the current setting resistor for better efficiency. SOT23-5L -40℃～85℃ FEATURES Inherently matched LED current High efficiency: 85% typical Drives up to four LEDs from a 3.
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