TDA7850A 查看數據表（PDF） - STMicroelectronics
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TDA7850A Datasheet PDF : 16 Pages
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TDA7850A
Electrical specifications
Table 4.
Symbol
Electrical characteristics (continued)
(Refer to the test and application diagram, VS = 14.4V; RL = 4Ω; Rg = 600Ω; f = 1KHz;
Tamb = 25°C; unless otherwise specified).
Parameter
Test Condition
Min. Typ. Max. Unit
Offset detector (Pin 26)
VM_ON Mute voltage for DC offset
VM_OFF detection enabled
Vstby = 5V
VOFF Detected differential output offset Vstby = 5V; Vmute = 8V
V26_T
Pin 26 voltage for detection =
TRUE
Vstby = 5V; Vmute = 8V
VOFF > ±4V
V26_F
Pin 26 Voltage for detection =
FALSE
Vstby = 5V; Vmute = 8V
VOFF > ±2V
1. Saturated square wave output.
8
V
6
V
±2
±3
±4
V
0
1.5
V
12
V
3.4
Electrical characteristic curves
Figure 4. Quiescent current vs. supply
voltage
Figure 5. Output power vs. supply voltage
(RL = 4Ω)
Id (mA)
200
190
Vi = 0
RL =∞
180
170
160
150
140
130
120
110
100
8
10
12
14
Vs (V)
Po (W)
80
75
70
65
RL= 4Ω
60
f = 1 KHz
Po-max
55
50
THD= 10%
45
40
35
30
25
THD= 1%
20
15
10
5
16
18
8
9
10
11
12
13
14
15
16
17
18
AC00064
Vs (V)
AC00064
Figure 6. Output power vs. supply voltage
(RL = 2Ω)
Figure 7. Distortion vs. output power
(RL = 4Ω)
Po (W)
130
THD (%)
10
120
110
RL= 2Ω
100
f = 1 KHz
90
80
Po-max
THD=10%
VS = 14.4 V
RL = 4Ω
1
70
0.1
60
50
40
THD=1%
30
0.01
20
10
0
8
0.001
9
10
11
12
13
14
15
16
17
18
0.1
Vs (V)
AC00066
f = 10 KHz
f = 1 KHz
1
10
Po (W)
100
AC00067
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