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LV8498CTGEVB:  Constant Current Driver IC Evaluation Board

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).

Features and Applications

Features

  • Constant current driver for voice coil motors
  • 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 2 helps withstand voltage drop in VCC. (Current detection resistance + output transistor on-resistance)
  • Built-in VCM overshoot preventive function (current slope function)
Evaluation/Development Tool Information
Product Status Compliance Short Description Parts Used Action
LV8498CTGEVB Active
Constant Current Driver IC Evaluation Board LV8498CT-TE-L-H
Technical Documents
Type Document Title Document ID/Size Rev
Eval Board: BOM LV8498CTGEVB Bill of Materials ROHS Compliant LV8498CTGEVB_BOM_ROHS.PDF - 61 KB  0 
Eval Board: Gerber LV8498CTGEVB Gerber Layout Files (Zip Format) LV8498CTGEVB_GERBER.ZIP - 32.0 KB  0 
Eval Board: Schematic LV8498CTGEVB Schematic LV8498CTGEVB_SCHEMATIC.PDF - 13 KB  0 
Eval Board: Test Procedure LV8498CTGEVB Test Procedure LV8498CTGEVB_TEST_PROCEDURE.PDF - 248 KB  1 
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