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PDF TDA7850A Data sheet ( Hoja de datos )
| Número de pieza | TDA7850A | |
| Descripción | 4 x 50 W MOSFET quad bridge power amplifier plus HSD | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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TDA7850A
4 x 50 W MOSFET quad bridge power amplifier plus HSD
Features
■ High output power capability:
– 4 x 50W/4Ω max.
– 4 x 30W/4Ω @ 14.4V, 1KHz, 10%
– 4 x 80W/2Ω max.
– 4 x 55W/2Ω @ 14.4V, 1KHz, 10%
www.DataShe■et4MUO.cSoFmET output power stage
■ Excellent 2Ω driving capability
■ Hi-fi class distortion
■ Low output noise
■ St-by function
■ Mute function
■ Automute at min. supply voltage detection
■ Low external component count:
– Internally fixed gain (26dB)
– No external compensation
– No bootstrap capacitors
■ On board 0.35A high side driver
Protections:
■ Output short circuit to GND, to Vs, across the
load
■ Very inductive loads
■ Overrating chip temperature with soft thermal
limiter
■ Output DC offset detection
■ Load dump voltage
■ Fortuitous open gnd
■ Reversed battery
Flexiwatt27
(vertical)
Flexiwatt27
(horizontal)
■ ESD
Description
The TDA7850A is a breakthrough MOSFET
technology class AB audio power amplifier in
Flexiwatt27 package designed for high power car
radio. The fully complementary P-Channel/N-
Channel output structure allows a rail to rail
output voltage swing which, combined with high
output current and minimized saturation losses
sets new power references in the car-radio field,
with unparalleled distortion performances.
The TDA7850A integrates a DC offset detector.
Table 1.
Device summary
Order code
TDA7850A
TDA7850AH
Package
Flexiwatt27 (vertical)
Flexiwatt27 (horizontal
Packing
Tube
Tube
October 2007
Rev 1
1/16
www.st.com
1
1 page  
TDA7850A
Block diagram and application circuit
1 Block diagram and application circuit
1.1 Block diagram
Figure 1. Block diagram
Vcc1
ST-BY
MUTE
IN1
0.1μF
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IN2
0.1μF
IN3
0.1μF
IN4
0.1μF
AC-GND
0.47μF
SVR
47μF
Vcc2
HSD
TAB
S-GND
470μF
100nF
OFF DET
HSD/OFF DET
OUT1+
OUT1-
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
D03AU1467
1.2
Standard test and application circuit
Figure 2. Standard test and application circuit
ST-BY
MUTE
IN1
R1
10K
R2
47K
C1
0.1μF
IN2
C2 0.1μF
IN3
C3 0.1μF
IN4
C4 0.1μF
C8
0.1μF
5
C9
1μF
23
C10
1μF
12
C7
2200μF
Vcc1-2 Vcc3-4
7 21
10
9
8
6
3
4
13 18
19
20
16
S-GND
15
14
17
C5
0.47μF
22
25
24
2
11 26 1, 27
SVR
C6
47μF
HSD/OFF DET
TAB
OFF DET
D03AU1469
OUT1
OUT2
OUT3
OUT4
5/16
5 Page 
TDA7850A
Electrical specifications
Figure 14. Power dissipation & efficiency vs. Figure 15. Power dissipation & efficiency vs.
output power (RL = 4Ω, SINE)
output power (RL = 2Ω, SINE)
90 Ptot (W)
80 VS = 14.4 V
RL = 4 x 4Ω
70 f = 1 KHz SINE
60
η (%)
90
η
80
70
60
Ptot (W)
180
160 VS = 14.4 V
140
RL = 4 x 2Ω
f = 1 KHz SINE
120
η (%)
90
80
η
70
60
50
50 100
50
40
40 80
Ptot
Ptot 40
30
30 60
30
20
20 40
20
10
10 20
10
00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
00
0 5 10 15 20 25 30 35 40 45 50 55
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Figure 16.
Po (W)
AC00074
Power dissipation vs. output power Figure 17.
(RL = 4Ω, audio program simulation)
Po (W)
AC00075
Power dissipation vs. output power
(RL = 2Ω, audio program simulation)
30 Ptot (W)
VS = 13.2 V
25
RL = 4 x 4Ω
GAUSSIAN NOISE
20
15
10
5
012
CLIP START
3
Po (W)
4
60 Ptot (W)
55 VS = 13.2 V
50 RL = 4 x 2Ω
GAUSSIAN NOISE
45
40
35
30
25
20
15
10
5
5 60
2
AC00076
CLIP START
4
Po (W)
6
8 10
AC00077
Figure 18. ITU R-ARM frequency response,
weighting filter for transient pop
Output attenuation (dB)
10
0
-10
-20
-30
-40
-50
10
100
1000
Hz
10000
100000
AC00343
11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TDA7850A.PDF ] | |
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