AN7195Z 查看數據表（PDF） - Panasonic Corporation

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AN7195Z

Dual 15 W BTL power IC for car audio

Panasonic Corporation 

ICs for Audio Common Use

AN7195Z

s Technical Information (continued)

[2] Application note (continued)

10. Beep sound input function

1) The application circuit using the beep sound input is shown in figure 7. Connect the beep signals from the

microcomputer to pin 10 via the capacitor C1 for DC cut and the resistor R1 for voltage gain adjustment.

2) The voltage gain of beep sound terminal is approx. −4.5 dB. With settings shown in the following drawing,

it is approx.−19 dB (f = 1 kHz).

3) The beep signal is outputted to output terminals, pin 2 and pin 15 only.

VREF = 2.1 V

300 Ω

34 dB

2

C1 47 kΩ

Beep input

0.022 µF R1

     150    

G V  =

25 k+300 × 50

1/jωC1+R1+

2

10

VREF = 2.1 V

25 kΩ

25 kΩ

300 Ω

15

34 dB

Figure 7

11. Two IC use

Figure 8 shows the application circuit example when two ICs are used :

Power supply 2 200 µF

4.7 kΩ

Out(RR)

Standby

2.2 kΩ

Mute

22 µF

47 µF

In(RR)

1 µF

In(FR)

1 µF

In(RL)

1 µF

In(FL)

1 µF

S-GND

0.022 µF

In(FL)

47 kΩ

4.7 kΩ

4.7 kΩ

4.7 kΩ

Figure 8

0.1 µF 0.1 µF

2.2 Ω 2.2 Ω

Out(FR)

0.1 µF 0.1 µF

2.2 Ω 2.2 Ω

Out(RL)

0.1 µF 0.1 µF

2.2 Ω 2.2 Ω

Out(FL)

0.1 µF 0.1 µF

2.2 Ω 2.2 Ω

11

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