BA3924

Regulator ICs Power supply for CD radio cassette players BA3924 The BA3924 is a system reference power supply for use in CD radio cassette players. Outputs dedicated to a microprocessor (5.0V), CD player (7.5V), audio system (7.5V), and motor drive (9V) are built in. Also built in is a VCC)B output that allows turning ON and OFF the supply voltage by HIGH and LOW levels of the standby pin. FApplications CD radio cassette players FFeatures 1) With outputs dedicated to a microcontroller, CD player, audio system, and motor drive, the IC is best suited for CD radio cassette players. 2) Zero standby current (typ.). 3) Output current limit circuit protects the IC against short-circuiting damage. 4) Compact 12-pin package allows large power dissipation. 5) Thermal shutdown circuit protects the IC against thermal damage. 6) VCC)B output allows turning ON and OFF the power supply voltage by HIGH and LOW levels of the standby pin. FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 141 Regulator ICs FBlock diagram BA3924 142 Regulator ICs FPin descriptions BA3924 143 Regulator ICs BA3924 144 Regulator ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 12V) BA3924 145 Regulator ICs BA3924 146 Regulator ICs FMeasurement circuits BA3924 147 Regulator ICs FCircuit operation BA3924 148 Regulator ICs FApplication example BA3924 149 Regulator ICs FOperation notes (1) Operating power supply voltage When oper...