BA5972FP

Optical disc ICs BTL driver for CD-ROMs BA5972FP The BA5972FP is a 4-channel BTL driver developed for use with CD-ROMs. A multi-purpose operational amplifier is equipped in each channel to allow use in a variety of applications. Also, by applying independent power supplies for both the pre-stage and power-stage, with the power-stage power supply further split into two so one power supply handles two channels each, a highly efficient driver has been realized. FApplications CD-ROM, DVD-ROM, MD, and optical discs FFeatures 1) Wide dynamic range (VOUT = 4V [Typ.] when PreVCC = 8V, PowVCC = 5V, and RL = 8Ω). 2) Internal thermal shutdown circuit. FAbsolute maximum ratings (Ta = 25_C) 3) Internal mute functions. 4) Internal standby functions. FRecommended operating conditions (Ta = 25_C) 662 Optical disc ICs FBlock diagram BA5972FP FPin descriptions 663 Optical disc ICs FInput / output circuits BA5972FP 664 Optical disc ICs BA5972FP FElectrical characteristics (unless otherwise noted, Ta = 25_C, PreVCC = 8V, PowVCC1 = 5V, PowVCC2 = 8V, BIAS = 2.5V, FElectrical characteristics (RL = 8Ω) 665 Optical disc ICs FMeasurement circuit BA5972FP 666 Optical disc ICs FMeasurement circuit switch table (1) Circuit current and standby (VMT = 0V, VIN = 2.5V, RL ! OFF, OPB ! 1, NF ! 1, OPRL ! 1) BA5972FP (2) Driver block (VST = 5V, RL ! ON, OPB ! 1, NF ! 1, OPRL ! 1) (3) Pre-stage operational amplifier block (VST = 5V, VMT = 0V, RL ! OFF) 667 Optical disc ICs FApplication ...