BA3574BFS

Audio ICs Low-current audio headphone driver BA3574BFS The BA3574BFS is a headphone driver with a fixed-gain bass boost circuit and an AVC circuit that keeps the output below a fixed level. It features low current dissipation, and low output noise, and is ideal for use in portable digital audio equipment. FApplications Portable CD and MD players FFeatures 1) Low current dissipation (when VCC = 2.4V, the quiescent current is 4.9mA). 2) Suitable for use in digital audio equipment (voltage gain: GV = 11.8dB, output noise voltage: VNO = *102dBm typ.). 3) Bass boost circuit. 4) AVC (Auto Volume Control) circuit, for output limiting. 5) Standby switch. 6) Mute switch. 7) Ripple filter. 8) No output coupling capacitor required. 9) Beep circuit. 10) SSOP-A20 package. 583 Audio ICs FBlock diagram BA3574BFS FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 584 Audio ICs BA3574BFS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 2.4V, RL = 16Ω, f = 1kHz, and BB = OFF) 585 Audio ICs FMeasurement circuit BA3574BFS 586 Audio ICs FMeasurement circuit switch table BA3574BFS 587 Audio ICs FApplication example 1 BA3574BFS 588 Audio ICs FApplication example 2 BA3574BFS 589 Audio ICs FApplication example 3 BA3574BFS 590 Audio ICs FOperation notes (1) Application circuits Provided the recommended circuit constants are used, the application circuits should function correctly. However, we recommend that you confirm t...