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BA5931FP

Part Number	BA5931FP
Manufacturer	Rohm
Description	4-channel BTL driver for CD players
Published	Apr 1, 2005
Detailed Description	Optical disc ICs 4-channel BTL driver for CD players BA5931FP The BA5931FP is a 4-channel BTL driver designed for CD pl...
Datasheet	BA5931FP PDF File

Overview

Optical disc ICs 4-channel BTL driver for CD players BA5931FP The BA5931FP is a 4-channel BTL driver designed for CD player motors and actuators.
The 28-pin HSOP package allows for application miniaturization.
FApplications CD players, CD-ROM drives FFeatures 1) Internal drivers for focus coils, tracking coils, spindle motors, feed motors and loading.
2) HSOP 28-pin package allows for miniaturization of applications.
3) Low number of external components.
4) Driver gain is adjustable with a single attached resistor.
5) Internal thermal shutdown circuit.
FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 278 Optical disc ICs FBlock diagram BA5931FP FPin descriptions 279 Optical disc ICs FInput / output circuits BA5931FP 280 Optical disc ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, RL = 8Ω, Vb = 2.
5V) BA5931FP 281 Optical disc ICs FMeasurement circuit BA5931FP 282 Optical disc ICs 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 BA5931FP 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.
283 Optical disc ICs (2) Switching the loading motor driver output mode (VCC = 8V) BA5931FP Note: Loading driver gain = 0dB (3) Setting the loading driver voltage (forward mode) Note: The loading output voltage will not exceed the power supply’s maximum output voltage, even if set above this maximum voltage.
The example above applies only when setting below the maximum output voltage.
Maximum out...

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BA5931FP 4-channel BTL driver for CD players - Rohm

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