AN7195 Panasonic Semiconductor, AN7195 Datasheet - Page 11

• Manufacturer Part Number: AN7195
• Description: Dual 15 W BTL power IC for car audio
• Manufacturer: Panasonic Semiconductor

ICs for Audio Common Use
[2] Application note (continued)
10. Beep sound input function
11. Two IC use
Technical Information (continued)
Standby
S-GND
1) The application circuit using the beep sound input is shown in figure 7. Connect the beep signals from the
2) The voltage gain of beep sound terminal is approx. 4.5 dB. With settings shown in the following drawing,
3) The beep signal is outputted to output terminals, pins 2 and 15 only.
Figure 8 shows the application circuit example when two ICs are used :
In(RR)
In(RL)
Power supply
In(FR)
In(FL)
In(FL)
Mute
microcomputer to pin 10 via the capacitor C1 for DC cut and the resistor R1 for voltage gain adjustment.
it is approx. 19 dB (f
G
2.2 k
22 F
47 F
0.022 F
V
1 F
1 F
1 F
1 F
1/j C1 R1
150
47 k
2 200 F
25 k 300
Beep input
1 kHz).
2
0.022 F R1
50
4.7 k
4.7 k
C1
47 k
Figure 8
10
V
V
REF
REF
2.1 V
2.1 V
4.7 k
4.7 k
Figure 7
300
25 k
300
25 k
0.1 F 0.1 F
0.1 F 0.1 F
0.1 F 0.1 F
0.1 F 0.1 F
2.2
2.2
2.2
2.2
34 dB
34 dB
Out(FR)
Out(RR)
Out(RL)
Out(FL)
AN7195K
15
2
11