an7191nz Panasonic Corporation of North America, an7191nz Datasheet - Page 11

• Manufacturer Part Number: an7191nz
• Description: Dual 20 W Btl Audio Power Amplifier
• Manufacturer: Panasonic Corporation of North America

ICs for Audio Common Use
[2] Application note
1. Standby function
2. Oscillation countermeasures
Technical Information (continued)
1) The power can be turned on or off by making
2) The standby terminal has threshold voltage of
3) The internal circuit of standby terminal is as shown in figure 1. When the standby terminal is high, the current
4) A power supply with no ripple component should be used for the control voltage of standby terminal.
1) In order to increase the oscillation allowance, connect a capacitor and a resistor in series between each output
2) The use of polyester film capacitor having a little fluctuation with temperature and frequency is recom-
pin 5 (standby terminal) high or low.
approx. 2.1 V, however, it has temperature de-
pendency of approx. 6 mV/ C. The recom-
mended range of use is shown in table 1.
approximately expressed by the following equation will flow into the circuit.
terminal and GND as shown in figure 2.
mended as the 0.22 F capacitor for oscillation prevention.
I
STB
V
STB
10 k
2.7 V
V
STB
[mA]
5 V
0 V
13,15
5
3,14
2,4
Sub
Figure 2
1
10 k
Terminal state Terminal voltage
0.22 F
2.2
Open
To speaker
High
Low
RF
Figure 1
3.5
k
Higher than 3 V
0 V to 1.0 V
Table 1
0 V
Protection
3.5
k
circuit
Operating state
AN7191NZ
3.5
k
Standby state
Standby state
current source
Power
Constant
3.5
k
11