4-channel BTL driver for CD players
Optical disc ICs
4-channel BTL driver for CD players
BA5934FP
The BA5934FP is a 4-channel BTL driver developed to drive...
Description
Optical disc ICs
4-channel BTL driver for CD players
BA5934FP
The BA5934FP is a 4-channel BTL driver developed to drive CD player motors and actuators. Perfect for compact applications with the use of the HSOP 28-pin power package. FApplications CD players, CD-ROM FFeatures 1) In addition to internal drivers for the focus coil, tracking coil, and sled motor, it also contains a driver for the loading motor. 2) Perfect for compact applications with the use of the HSOP 28-pin power package. 3) Requires few external components. FAbsolute maximum ratings (Ta = 25_C)
4) Driver gain is adjustable with a single externally connected resistor. 5) Internal thermal shutdown circuit. 6) External mute pin enables the muting of the output current for channel 4.
FRecommended operating conditions (Ta = 25_C)
718
Optical disc ICs
FBlock diagram
BA5934FP
FPin descriptions
719
Optical disc ICs
FInput / output circuits
BA5934FP
720
Optical disc ICs
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, RL = 8Ω, VBIAS = 2.5V)
BA5934FP
721
Optical disc ICs
FMeasurement circuit
BA5934FP
722
Optical disc ICs
FCircuit operation (1) Driver block The input is the focus and tracking error signals from the servo pre-amplifier and the control signals for the motor system. The input signal is normally centered at 2.5V, and at the pre-amplifier, it undergoes V / I conversion to generate the current corresponding to the input voltage. This is then passed through a resistor...
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