LV8498CT

Ordering number : ENA1625B LV8498CT Bi-CMOS IC For VCMs Constant-current Driver IC http://onsemi.com Overview The LV8498CT is a constant current driver IC for voice coil motors that supports I2C control integrating a digital/analog converter (DAC). It uses an ultraminiature WLP package and includes a current detection resistor for constant current control, which makes the IC ideal for miniaturization of camera modules intended for use in camera-equipped mobile phones. The output transistor has a low on-resistance of 1Ω and the resistance of the built-in current detection resistor is 1Ω, which minimizes the voltage loss and helps withstand voltage drop in VCC. The function is incorporated, which, by changing the current in a stepped pattern while taking time at rise and fall of the output current, provides the current a slope, improving the converging stability of the voice coil motor (current slope function). Functions Constant current driver for voice coil motors. I2C bus control supported. Constant current control enabled by DAC (10 bits). Wide operating voltage range (2.2 to 5.0V). Built-in current detection resistor. 6-pin WLP package used (1.27 × 0.87 × 0.25mm). Built-in voltage drop protection circuit (VCC = 2V output off). Built-in thermal protection circuit. Low output block total-resistance of 2Ω helps withstand voltage drop in VCC. (Current detection resistance + output transistor on-resistance). Built-in VCM overshoot preventive funct...