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 1 Ω and the resistance of the built-in current detection resistor is 1 Ω, 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).
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Features |
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Benefits |
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I2C bus control supported.
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Wide operating voltage range (2.2 to 5.0V).
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Wide power supply application
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Built-in current detection resistor.
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6-pin WLP package used (1.27 0.87 0.25mm).
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Built-in voltage drop protection circuit (VCC = 2V output off).
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Built-in thermal protection circuit.
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Constant current control enabled by 10bit DAC
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Improving the converging stability of the AF-VCM
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Constant current driver for voice coil motors.
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Low output block total-resistance of 2Ω helps withstand voltage drop in VCC. (Current detection resistance + output
transistor on-resistance).
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Built-in VCM overshoot preventive function (current slope function).
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Power supply Voltage: 2.2 to 5.0V
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