Optical disc ICs
4-channel BTL driver for CD players
BA6398FP
The BA6398FP is a 4-channel BTL driver for CD player moto...
Optical disc ICs
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
FFeatures 1) 28-pin HSOP package allows for miniaturization of applications. 2) Low number of external components. 3) Driver gain is adjustable with a single attached resistor. FAbsolute maximum ratings (Ta = 25_C)
4) Internal 5V
regulator. (requires attached
PNP transistor) 5) Internal standard operational amplifier. 6) Internal thermal shutdown circuit.
FRecommended operating conditions (Ta = 25_C)
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Optical disc ICs
FBlock diagram
BA6398FP
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Optical disc ICs
FPin descriptions
BA6398FP
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Optical disc ICs
FInput / output circuits
BA6398FP
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Optical disc ICs
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1kHz, RL = 8Ω)
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...