Low power consumption headphone driver for digital audio
Audio ICs
Low power consumption headphone driver for digital audio
BA3577FS
The BA3577FS is a headphone driver develope...
Description
Audio ICs
Low power consumption headphone driver for digital audio
BA3577FS
The BA3577FS is a headphone driver developed for portable digital audio equipment that supports a voltage of 1.5V.
FApplications Portable MD players and others
FFeatures 1) 1.5V supported. 2) Low current consumption (At PO = 0.5mW / ch, VCC inflow current = 3.3mA, and )B inflow current = 6.8mA (Typ.)). 3) Output coupling capacitor of 100µF produces fC = 45Hz (RL = 16Ω).
4) Internal muting switch. 5) Internal ripple filter. 6) Internal BEEP circuit.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
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Audio ICs
FBlock diagram
BA3577FS
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FPin descriptions
BA3577FS
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Audio ICs
BA3577FS
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BA3577FS
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 2.8V, )B = 1.2V, PWSTB = 2.8V, MUTE = 0V, RL = 16Ω, f = 1kHz, DIN AUDIO)
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FMeasurement circuit
BA3577FS
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Measurement conditions
BA3577FS
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BA3577FS
FCircuit operation (1) The BA3577FS operates at the timing chart shown below, which prevents popping noises in the headphone output.
(2) The ripple filters (pins 1 and 2) and bias amplifiers (pins 3 and 4) of the BA3577FS cannot be used as external power supplies or reference voltages. (3) The BA3577FS outputs a BEEP signal only when the PWSTB pin (pin 7) and the MUTE pin (pin 9) are HIGH. Also, input a rectangular waveform of 500Hz to 5kHz with an amplitude from the GND ...
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