TEA7530DP datasheet(8/11 Pages) STMICROELECTRONICS

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PIN 5-7: LOUDSPEAKER OUTPUTS

Maximum outpt voltage: Vpp =2VLS - 2.5V (with a

gain of 32dB).

Maximum output current: depending of the supply

current.

Two loudspeaker connection methods are possi-

ble, using the amplifier in either symmetrical or

asymmetrical mode.

Note:

It is advisable to connect a 47nF capacitor in par-

allel with the loudspeaker (between pins 5 and 7).

- ”Symmetrical” mode

This is for low voltage working, but at a higher

supply current. The highest output power is avail-

able in this mode, due to the 5.7V maximum sup-

ply voltage restriction, imposed by the TEA7530

Loudspeaker impedance recommended value:

Ω.

Nominal gain available between earphone input

and loudspeaker outputs: 32dB.

- ”Asymmetrical” Mode

This allows higher voltage operation, but at a

lower supply current.

Loudspeaker impedance recommended value:

Ω.

Nominal gain available between earphone input

and loudspeaker output: 32 - 6 = 26dB.

Pin 6: Vref: INTERNAL REFERENCE

Output which provides an internally regulated ref-

erence voltage.

Vref = 1.2V typical

MAXIMUM AVAILABLE CURRENT: 5

µA

Pin 8: ADJUST VLS

This pin is used to adjust the IC supply voltage.

Figure 14

Figure 15

TEA7530

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TEA7530DP Datasheet(PDF) 8 Page - STMicroelectronics