Optical disc ICs
4-channel BTL driver for CD players
BA6898S / BA6898FP
The BA6898S / BA6898FP ICs contain a 4-channel ...
Optical disc ICs
4-channel BTL driver for CD players
BA6898S / BA6898FP
The BA6898S / BA6898FP ICs contain a 4-channel BTL driver , 5V
regulator (which requires an externally connected
PNP transistor), multi-purpose operational amplifier, and reset output for use with CD players. Also equipped with an input pin for gain adjustment for all channels of the driver block so that the gain can be adjusted to the desired value for your application. Furthermore, a built-in level shift circuit exists to further reduce the amount of external components required. FApplications CD players, CD-ROM, and other optical disc equipment FFeatures 1) 4-channel BTL driver. 2) Gain is adjustable with externally connected resistor. 3) Internal thermal shutdown circuit.
4) Internal 5V
regulator (requires external
PNP transistor). 5) Internal multi-purpose operational amplifier. 6) Equipped with reset output pin.
FAbsolute maximum ratings (Ta = 25_C)
671
Optical disc ICs
FBlock diagram
BA6898S/BA6898FP
672
Optical disc ICs
BA6898S/BA6898FP
673
Optical disc ICs
FPin descriptions BA6898S
BA6898S/BA6898FP
BA6898FP
674
Optical disc ICs
FInput / output circuits
BA6898S/BA6898FP
675
Optical disc ICs
BA6898S/BA6898FP
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V, f = 1kHz, RL = 8Ω)
676
Optical disc ICs
FMeasurement circuit
BA6898S/BA6898FP
677
Optical disc ICs
FCircuit operation (1) Driver block The input is the focus and tracking error signals from the se...