ADP1660雙750毫安LED閃存驅(qū)動(dòng)器與I2C兼容接口

　　The ADP1660 is a very compact， highly efficient， dual white LED flash driver for high resolution camera phones that improves picture and video quality in low light environments. The device integrates a programmable 1.5 MHz or 3.0 MHz synchronous inductive boost converter， an I2 C-compatible interface， and two 750 mA current sources. The high switching frequency enables the use of a tiny， 1 mm high， low cost， 1 μH power inductor， and the parallel current sources permit LED cathode grounding for thermally enhanced， low EMI， and compact layouts. The LED driver maximizes efficiency over the entire battery voltage range to maximize the input-power-to-LED-power conversion and minimize battery current draw during flash events. A programmable dc battery current limit safely maximizes LED current for all LED forward voltage and battery voltage conditions. A TxMASK input enables fast reduction of the flash LED currents and battery current during a power amplifier current burst. The I2 C-compatible interface can be used to program timers and currents and to read back status bits for operation monitoring and safety control. The ADP1660 comes in a compact， 12-ball， 0.5 mm pitch WLCSP package and operates within specification over the full ?40°C to +125°C junction temperature range.