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Optoelectronics/Displays??

'Smallest' LED driver delivers 800mA

Posted: 03 Nov 2006 ?? ?Print Version ?Bookmark and Share

Keywords:National Semiconductor? flash LED driver? flash LED drivers? LED drivers? LED driver?

The LM2754 from National Semiconductor is touted by the company as the world's smallest, fully-integrated flash LED driver.

Taking less than 28mm? of board space, the LM2754 solution delivers up to 800mA. The chip, which can drive up to four LEDs in parallel, features soft-start circuitry to limit inrush current, time-out circuitry to limit flash duration to 1 second, adjustable output power control, and output current limiting.

The LM2754 reduces noise spikes on the input, a common problem when pulling high flash currents from a battery source for cell phone applications. In typical high-power boost converters, the input current and associated noise levels can cause the mobile device to be knocked off of the network, resulting in a dropped call. In that context, the LM2754 "shares" the battery with the RF amplifier to appropriately cut RF power when the (simultaneous) LED and RF load demands are high.

Housed in a 24-pin, 4-by-4 mm LLP, the LM2754 is priced at $2 each in 1,000-unit quantities.

- Vince Biancomano
eeProductCenter




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Related Datasheets
Part Number Description Category
? LM2754 800mA Switched Capacitor Flash LED Driver with Time-Out Protection ICs, Interface

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