ADP1650

1.5 A LED Flash Driver with I2C-Compatible Interface ADP1650 www.DataSheet4U.com FEATURES Ultracompact solution Small, 2 mm × 1.5 mm, 12-ball WLCSP package Smallest footprint, 1 mm height, 1 μH power inductor LED current source for local LED grounding Simplified routing to/from LED Improved LED thermals Synchronous 3 MHz PWM boost converter, no external diode High efficiency: 90% peak Reduces high levels of input battery current during flash Limits battery current drain in torch mode I2C programmable Currents up to 1500 mA in flash mode for one LED with 7% accuracy over all conditions Currents up to 200 mA in torch mode Programmable dc battery current limit (4 settings) Programmable flash timer up to 1600 ms Low VBAT mode to reduce LED current automatically 4-bit ADC for LED VF, die/LED temperature readback Control I2C-compatible control registers External STROBE and torch input pins 2 transmitter mask (TxMASK) inputs Safety Thermal overload protection Inductor fault detection LED short-/open-circuit protection FUNCTIONAL BLOCK DIAGRAM INPUT VOLTAGE = 2.7V TO 5.0V 10µF 1.0µH TX1/TORCH TX2/ILED/ADC GPIO1 GPIO2 VIN SW VOUT 10µF ADP1650 STROBE SCL SDA EN SGND PGND 08837-001 LED_OUT MAX 1.5A Figure 1. C1 Li-ION + L1 PGND Li-ION + C2 INDUCTOR DIGITAL INPUT/ OUTPUT APPLICATIONS Camera-enabled cellular phones and smart phones Digital still cameras, camcorders, and PDAs AREA = 16.4mm 2 08837-002 LED ANODE Figure 2. PCB Layout GENERAL DESCRIPTION The ADP1650 is a ver...