Speaker / headphone switch power amplifier - Rohm
Description
Audio ICs
Speaker / headphone switch power amplifier
BA5210FS
The BA5210FS is a power amplifier with a built-in monaural speaker / stereo headphone switch.
The speaker drive is BTL for large output, and when the headphones are connected, the “center-amp” design means that coupling is not required.
This significantly reduces the number of external components required, and makes this IC ideal for compact sets that have high component density.
Mute and standby functions are provided, and direct microprocessor control is possible.
FApplications Notebook computers, electronic books, portable CD players, video cameras with built-in monitors, LCD TVs, radios, and electronic instruments FFeatures 1) Built-in BTL / stereo switch circuit.
2) Mute function.
3) Standby function.
FBlock diagram
4) Few external components required.
5) Low current dissipation and good sound quality.
510
Audio ICs
FAbsolute maximum ratings (Ta = 25_C)
BA5210FS
FRecommended operating conditions (Ta = 25_C)
511
Audio ICs
FPin descriptions
BA5210FS
512
Audio ICs
BA5210FS
513
Audio ICs
BA5210FS
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 3.
3V RL = 8Ω, f= 1kHz and Rg = 600Ω)
514
Audio ICs
FMeasurement circuit
BA5210FS
FApplication example
515
Audio ICs
FOperation notes A characteristic of this IC is that if it is used with a supply voltage that is less than the recommended value (2.
5V), the OUT-R offset increases.
When using the IC with a BTL 8Ω load, if the voltage drops, the supply current will increase accompanied by an increase in power supply impedance, which can lead to low-frequency blocking oscillation.
For this reason, we recommend that you use a low-voltage detection circuit that puts the IC in the standby state when the voltage drops below 2.
5V.
FElectrical characteristics curves
BA5210FS
516
Audio ICs
FExternal dimensions (Units: mm)
BA5210FS
517
...
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