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4-channel BTL driver for CD players

BA6398FP

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4-channel BTL driver for CD players
BA6398FP
The BA6398FP is a 4-channel BTL driver for CD player motors and actuators. This IC has an internal 5V regulator, and is suited to a wide range of applications.
FApplications CD players and CD-ROM drives
4) Internal 5V regulator. (requires attached PNP transistor) 5) Internal standard operational amplifier. 6) Internal thermal shutdown circuit.
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FBlock diagram
BA6398FP
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FPin descriptions
BA6398FP
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FInput / output circuits
BA6398FP
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BA6398FP
FCircuit operation (1) Driver Inputs to the IC are the focus tracking error signal from the servo preamplifier and the control signal from the motor. The input signals, which normally center on 2.5V, are V / I converted by the preamplifier, generating a current corresponding to the input voltage. This current is
passed through a resistor and into the internal reference voltage component, the preamplifier output being a signal centering on the internal reference voltage. Two systems (positive phase and negative phase) are created during V / I conversion, generating BTL output via the driver buffer.
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(2) Regulator This is a typical series regulator that generates a reference voltage internally. A PNP low saturation types transistor must be connected.
BA6398FP
(3) Operational amplifier A standard 4558 type. FApplication example
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BA6398FP
FElectrical characteristic curves
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FElectrical characteristic curves
BA6398FP
FExternal dimensions (Units: mm)