BA5934FP

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...