MIC2871YMK TR Microchip

MIC2871 1.2A High-Brightness Flash LED Driver with Single-Wire Serial Interface Features General Description Up to 1.2A Flash LED Driving Current The MIC2871 is a high-current, high-efficiency flash LED driver. The LED driver current is generated by an inte- Highly Efficient, Synchronous Boost Driver grated inductive boost converter with a 2 MHz switching (up to 94%) frequency, which allows the use of a very small inductor 5% LED Current Accuracy and output capacitor. These features make the MIC2871 Control through Single-Wire Serial Interface or an ideal solution for high-resolution camera phone LED External Control Pins flashlight driver applications. Input Voltage Range: 2.7V to 5.5V The MIC2871 operates in either Flash or Torch modes True Load Disconnect that can be controlled through the single-wire serial inter- Configurable Safety Time-Out Protection face and/or external control pins. Default flash and torch Output Overvoltage Protection (OVP) brightness can be adjusted via an external resistor. A LED Short Detection and Protection robust single-wire serial interface allows simple control 1 A Shutdown Current by the host processor to support typical camera Available in 14-Pin 3 mm x 2 mm LDFN Package functions. such as auto-focus, white balance, and image capture (Flash mode). Applications The MIC2871 is available in a 14-pin 3 mm x 2 mm LDFN Camera Phones/Mobile Handsets package with a junction temperature range of 40C to +125C. Cell Phones/Smartphones LED Light for Image Capture/Auto-Focus/ White Balance Handset Video Light (Torch Light) Digital Cameras Portable Applications 2018 Microchip Technology Inc. DS20006079A-page 1MIC2871 Package Type MIC2871 14-Pin 3 mm x 2 mm LDFN (MK) (Top View) 1 FRSET 14 AGND1 2 PGND2 DC 13 NC LED 3 12 FEN1 4 11 FEN2 AGND2 5 10 SW NC 6 9 V ePAD IN (EP) 78 OUT PGND1 Typical Application Schematic L1 1 H LED1 SW V V OUT BAT IN FLASH C1 WHITE 2.2 F/10V C4 AGND2 LED LED 4.7 F EPAD PGND1 AGND1 GND PGND2 FRSET DC SINGLE-WIRE SERIAL I/F R4 20.5 k FEN1 FLASH ENABLE 1 FLASH ENABLE 2 FEN2 AGND2 U1 MIC2871YMK DS20006079A-page 2 2018 Microchip Technology Inc.