A3904ECW

A3904 Low Voltage Voice Coil Motor Driver Features and Benefits ▪ Fixed I2C logic thresholds ▪ 8-bit D-to-A converter ▪ 500 μA resolution ▪ Low voltage I2C serial interface ▪ Low current-draw sleep mode ▪ 2.4 to 5.5 V operation ▪ 2 mm × 1.5 mm, 0.38 mm nominal overall height DFN ▪ 1.1 mm × 0.7 mm, 0.5 mm maximum overall height WLCSP ▪ 1.1 mm × 0.7 mm, 0.33 mm nominal overall height bare die Description The A3904 is a voice coil motor (VCM) driver, with an I2C-compatible serial interface. Designed for camera autofocus and zoom applications, this high accuracy digital IC is provided in small packages ideal for portable devices. Its operating voltage range is 2.4 to 5.5 V, and its maximum output current is 127 mA. Output current is programmed via the I2C interface, in 500 uA increments, with clock rates up to 400 kHz. I2C inputs set the internal D-to-A converter output voltage that is the reference for linear current control via a MOSFET output sink transistor. To conserve battery power, a logic low signal on the SLEEPZ input disables the output MOSFET and reduces the supply current to