AN7199Z Datasheet, PDF (11/17 Pages) Panasonic Semiconductor – Dual 20 W BTL power IC for car audio

ICs for Audio Common Use
s Technical Information (continued)
[2] Main characteristics (continued)
I_CQ  V_STB
200
180
160
140
120
100
80
60
40
20
0
0.0
1.0
2.0
VCC = 13.2 V
RL = 4 Ω
Rg = 10 kΩ
3.0
4.0
5.0
Standby voltage V_STB (V)
AN7199Z
250
200
150
100
50
0
−50
−100
−150
−200
−250
0
V_offset  V_CC
ch.2
ch.1
ch.2 mute on
ch.1 mute on
RL = 4 Ω
Rg = 10 kΩ
5
10
15
20
Supply voltage V_CC (V)
[3] Application note
1. Standby function
1) The power can be turned on or off by
making pin 5 (standby terminal) high
or low.
Table 1
2) The standby terminal has threshold
Terminal state Terminal voltage
Power
voltage of approx. 2.1 V, however, it
has temperature dependency of
approx. − 6 mV/°C. The recommended
range of use is shown in table 1.
Open
Low
High
0V
0 V to 1.0 V
Higher than 3 V
Standby state
Standby state
Operating state
3) The internal circuit of standby terminal is as shown in figure 1. When the standby terminal is high, the current
approximately expressed by the following equation will flow into the circuit.
I_STB =
V_STB−2.7 V
10 kΩ
[mA]
5V
V_STB
0V
5
10 kΩ
Protection Constant
RF circuit
current source
Sub
2 kΩ 4 kΩ
Figure 1
4) A power supply with no ripple component should be used for the control voltage of standby terminal .
11