A8932CLWA - Brand New Allegro MicroSystems IC Chips
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Description
A8932CLWA is a voice-coil motor driver used for head positioning in 5 V disk drive applications. It is a full-bridge driver that provides control and drive of the voice-coil motor. The output current of A8932CLWA can be configured as a direct function of an externally applied control voltage or current. It also has additional circuitry to protect the heads and the data disk during system failure or normal system shutdown. The driver outputs of A8932CLWA provide very low saturation voltage and minimal power dissipation. It eliminates the need for an external current-sense resistor with its sense-FET structure, achieving additional headroom. The internal circuitry can be configured to provide closed-loop velocity control of the actuator by utilizing the generated back-EMF of the voice-coil motor. A8932CLWA also has thermal protection and under-voltage lockout to disable the system in a controlled sequence if a fault condition occurs.
Specifications and features
■ Class-B, 2 Ω rDS(on) at 500 mA Output
■ Lossless Current Sensing
■ Zero Current-Loop Deadband
■ High Transconductance Bandwidth
■ User-Adjustable Transconductance Gain
■ Digital Transconductance Gain Switch (4:1 Ratio)
■ 5 Volt Monitor with Selectable UV Trip Point
■ Retract Circuitry Functional to 0 Volts
■ Sleep Mode Function
■ Internal Back-EMF Velocity Loop Option
■ Internal Thermal Shutdown Circuitry
Application Scenarios
A8932CLWA can be widely used in 5 V disk drive applications where voice-coil motor control and drive are required. It is suitable for applications that need closed-loop velocity control of the actuator and protection of heads and data disk during system failure.
Comparison
Advantages- Provides control and drive of the voice-coil motor
- Output current can be configured as a direct function of an externally applied control voltage or current
- Additional circuitry to protect heads and data disk during system failure or normal system shutdown
- Very low saturation voltage and minimal power dissipation
- Eliminates the need for an external current-sense resistor with the sense-FET structure
- Can provide closed-loop velocity control of the actuator by utilizing the generated back-EMF of the voice-coil motor
- Thermal protection and under-voltage lockout for system safety
Disadvantages- Not suitable for applications that do not require voice-coil motor control and drive
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Similar parts: 430483 , Click to view
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Datasheet
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Popular parts of the same kind
- Datasheet: Download A8932CLWA
- Chipdatas Part: CD94-A8932CLWA
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- Last Updated: 2024/06/13 20:11 +0800
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