ADD5205 - Analog Devices

ADD5205 Four-String White LED Driver

The ADD5205 is a white LED driver for backlight applications based on high efficiency, current mode, step-up converter technology. It is designed with a 0.3 Ω internal switch and 1 MHz fixed operating frequency. The ADD5205 contains four regulated constant current sources for uniform brightness intensity. Each current source is capable of driving up to 25 mA.

Features

White LED driver based on inductive boost converter Input voltage range: 2.8 V to 18 V Internal compensation 1 MHz fixed operating frequency 28 V fixed overvoltage protection Built-in soft start for boost converter Drives up to 4 LED current sources LED current adjustable up to 25 mA for each channel DC current level brightness control with PWM input LED open fault protection General Thermal shutdown Undervoltage lockout 12-lead, 3 mm × 3 mm × 0.75 mm LFCSP package ADD5205 FUNCTIONAL BLOCK DIAGRAM STEP-UP SWITCHING REGULATOR 4-CHANNEL CURRENT SOURCES BRIGHTNESS CONTROL LOGIC UNDERVOLTAGE LOCK.