ADP5501

10kΩ 10kΩ 2.2kΩ 2.2kΩ 07780-001 Programmable Current Backlight Driver with Ambient Light Sensor Input ADP5501 FEATURES Efficient asynchronous boost converter for driving up to 6 white LEDs 2.7 V to 5.5 V input voltage range 128 programmable backlight LED current levels (30 mA maximum) Programmable backlight fade-in/fade-out times Programmable backlight dim and off times Ambient light sensing with autonomous backlight adjustment 3 auxiliary LED current sinks 64 programmable auxiliary LED current levels (14 mA maximum) Programmable auxiliary LED fade-in/fade-out times Programmable auxiliary LED on and off times (allows blinking) I2C-compatible serial interface Interrupt line for signaling an external processor (INT) Hard reset (RST) Current limit protection Thermal overload protection Available in small 4.0 mm × 4.0 mm, 24-lead LFCSP package APPLICATIONS Display backlight driver with ambient light sensor input and control and multiple LED indicator sinks TYPICAL OPERATING CIRCUIT 2.7V TO 5.5V 1µF I/O RAIL 4.7µH 1µF 2 1 PGND SW 21 VBAT 22 BST 23 BL_SNK CAP_OUT 20 16 VDDIO 5 SCL 4 SDA 3 INT 15 RST ADP5501 GND 19 GND 18 GND 24 CMP_IN 17 RGB NC NC NC NC NC NC 6 7 8 9 10 11 LED1 LED2 LED0 12 13 14 1µF 100nF VBAT 3.3V Figure 1. GENERAL DESCRIPTION The ADP5501 is a versatile, single-chip, white LED backlight driver with programmable ambient light sensor input and programmable LED current. This device is designed for mediaenabled handset applications. The ADP5501 u...