1.2A High-Brightness LED Flash Driver
MIC2871
1.2A High-Brightness LED Flash Driver with Single-Wire Serial Interface
General Description
The MIC2871 is a hi...
Description
MIC2871
1.2A High-Brightness LED Flash Driver with Single-Wire Serial Interface
General Description
The MIC2871 is a high-current, high-efficiency flash LED driver. The LED driver current is generated by an integrated inductive boost converter with a 2MHz switching frequency which allows the use of very small inductor and output capacitor. These features make the MIC2871 an ideal solution for high-resolution camera phone LED flash light driver applications.
The MIC2871 operates in either flash or torch modes that can be controlled through the single-wire serial interface and/or external control pins. Default flash and torch brightness can be adjusted via an external resistor. A robust single-wire serial interface allows simple control by the host processor to support typical camera functions such as auto-focus, white balance, and image capture (flash mode).
The MIC2871 is available in a 14-pin 3mm × 2mm LDFN package with a junction temperature range of −40°C to +125°C.
Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com.
Features
Up to 1.2A flash LED driving current Highly-efficient, synchronous boost driver (up to 94%) ±5% LED current accuracy Control through single-wire serial interface or external
control pins Input voltage range: 2.7V to 5.5V True load disconnect Configurable safety time-out protection Output overvoltage protection (OVP) LED short detection and protection. 1µA shutdown current Available in 14-...
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