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Part Number
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LM27951 |
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Manufacturer
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National Semiconductor |
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Description
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White LED Adaptive 1.5X/1X Switched Capacitor Current Driver |
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Published
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Apr 22, 2010 |
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Detailed Description
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November 2005 www.DataSheet4U.com
LM27951 White LED Adaptive 1.5X/1X Switched Capacitor Current Driver
LM27951 White L...
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Datasheet
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LM27951
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Overview
November 2005 www.
DataSheet4U.
com
LM27951 White LED Adaptive 1.
5X/1X Switched Capacitor Current Driver
LM27951 White LED Adaptive 1.
5X/1X Switched Capacitor Current Driver
General Description
The LM27951 is a switched capacitor white-LED driver capable of driving up to 4 LEDs with 30mA through each LED.
Its 4 tightly regulated current sources ensure excellent LED current and brightness matching.
LED drive current is programmed by an external sense resistor.
The LM27951 operates over an input voltage range from 3.
0V to 5.
5V and requires only four low-cost ceramic capacitors.
The LM27951 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/...
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