TDA7854 [STMICROELECTRONICS]
4 x 47W MOSFET quad bridge power amplifier; 4× 47W MOSFET的四桥功率放大器
| 型号： | TDA7854 |
| 厂家： | 
ST |
| 描述： | 4 x 47W MOSFET quad bridge power amplifier |
| 文件： | 总12页 (文件大小：168K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TDA7854
4 x 47W MOSFET quad bridge power amplifier
Features
■ Multipower BCD technology
■ High output power capability:
– 4 x 47W/4Ω max.
– 4 x 80W/2Ω max.
■ MOSFET output power stage
■ Excellent 2Ω driving capability
■ Hi-fi class distortion
Flexiwatt 25
■ Low output noise
■ St-by function
■ Mute function
■ Automute at min. supply voltage detection
■ Fortuitous open GND
■ Low external component count:
– Internally fixed gain (26dB)
– No external compensation
– No bootstrap capacitors
■ Reversed battery
■ ESD
Description
Protections:
The TDA7854 is a breakthrough MOSFET
technology class AB audio power amplifier in
Flexiwatt 25 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.
■ Output short circuit to GND, to V , across the
s
load
■ Very inductive loads
■ Overrating chip temperature with soft thermal
limiter
■ Load dump voltage
Table 1. Device summary
Order code
Package
Flexiwatt 25
Packing
TDA7854
Tube
October 2007
Rev 1
1/12
www.st.com
1
Contents
TDA7854
Contents
1
2
3
4
Block diagram and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
1.2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
2.2
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
3.2
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1
4.2
4.3
4.4
SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Stand-by and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Heatsink definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
6
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12
TDA7854
List of tables
List of tables
Table 2.
Table 3.
Table 4.
Table 5.
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3/12
List of figures
TDA7854
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Power dissipation vs. output power (R = 4Ω, audio program simulation) . . . . . . . . . . . . . . 9
L
Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4/12
TDA7854
Block diagram and application circuit
1
Block diagram and application circuit
1.1
Block diagram
Figure 1.
Block diagram
Vcc1
Vcc2
ST-BY
MUTE
CD
OUT1+
OUT1-
IN1
IN2
IN3
IN4
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
AC-GND
SVR
TAB
S-GND
D06AU1646
1.2
Application circuit
Figure 2.
Application circuit
C8
C7
0.1μF
2200μF
Vcc1-2
Vcc3-4
6
20
R1
10K
R2
ST-BY
MUTE
4
9
8
7
C9
1μF
OUT1
OUT2
OUT3
OUT4
22
47K
C1
C10
1μF
5
2
3
IN1
IN2
IN3
IN4
11
12
15
0.1μF
17
18
19
C2 0.1μF
C3 0.1μF
C4 0.1μF
21
24
23
14
13
S-GND
16
10
25
1
SVR
TAB
CD
C5
0.47μF
C6
47μF
D06AU1647A
R3
V
47K
CD OUT
5/12
Pin description
TDA7854
2
Pin description
2.1
Pin connection
Figure 3.
Pin connection (top view)
1
25
D94AU159mod
2.2
Thermal data
Table 2.
Symbol
Thermal data
Parameter
Value
Unit
Rth j-case Thermal resistance junction to case
max
1
°C/W
6/12
TDA7854
Electrical specifications
3
Electrical specifications
3.1
Absolute maximum ratings
Table 3.
Symbol
Absolute maximum ratings
Parameter
Value
Unit
VS
Operating supply voltage
18
28
50
V
V
V
VS (DC) DC supply voltage
VS (pk) Peak supply voltage (for t = 50ms)
Output peak current
IO
Non repetitive (t = 100μs)
Repetitive (duty cycle 10% at f = 10Hz)
10
9
A
A
Ptot
Tj
Power dissipation Tcase = 70°C
Junction temperature
85
150
W
°C
°C
Tstg
Storage temperature
-55 to 150
3.2
Electrical characteristics
Table 4.
Electrical characteristics
(Refer to the test and application diagram, VS = 14.4V; RL = 4Ω; Rg = 600Ω; f = 1KHz;
Tamb = 25°C; unless otherwise specified).
Symbol
Parameter
Quiescent current
Test condition
Min.
Typ.
Max.
Unit
Iq1
VOS
Gv
RL = ∞
100
-60
25
150
250
+60
27
mA
mV
dB
Output offset voltage
Voltage gain
Play mode / Mute mode
26
dGv
Channel gain unbalance
1
dB
VS = 14.4V; THD = 10%
VS = 14.4V; THD = 1%
28
22
W
W
Po
Output power
VS = 14.4V; THD = 10%, 2Ω
VS = 14.4V; THD = 1%, 2Ω
48
38
W
W
VS = 15.2V; RL = 4Ω
VS = 15.2V; RL = 2Ω
47
80
W
W
Po max. Max. output power(1)
THD
eNo
Distortion
Po = 4W
0.01
%
"A" Weighted
35
50
μV
μV
Output Noise
Bw = 20Hz to 20KHz
100
120
SVR
fch
Supply voltage rejection
High cut-off frequency
Input Impedance
f = 100Hz; Vr = 1Vrms
PO = 0.5W
50
100
80
70
dB
KHz
KΩ
300
100
Ri
7/12
Electrical specifications
TDA7854
Table 4.
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
Symbol
Min.
Typ.
Max.
Unit
f = 1KHz PO = 4W
f = 10KHz PO = 4W
60
70
60
-
-
dB
dB
CT
Cross Talk
ISB
St-by current consumption
St-by pin current
VSt-By = 0
10
1
μA
μA
V
Ipin5
VSt-By = 1.2V to 2.65V
(Amp: ON)
VSB out St-by out threshold voltage
2.65
VSB in
AM
St-by in threshold voltage
Mute attenuation
(Amp: OFF)
POref = 4W
1.2
1.2
V
80
90
7
dB
V
VM out
VM in
Mute out threshold voltage
Mute in threshold voltage
(Amp: Play)
(Amp: Mute)
2.6
V
(Amp: Mute)
Att ≥ 80dB; POref = 4W
6.8
V
VAM in
VS automute threshold
Muting pin current
(Amp: Play)
Att < 0.1dB; PO = 0.5W
7.5
12
8
V
V
MUTE = 1.2V
(Sourced current)
MUTE = 2.6V
7
18
18
μA
μA
Ipin23
V
-5
CLIPPING DETECTOR
CDLK
Clip Det high leakage current
Cd Off
0
0.2
2
1
μA
V
CDSAT Clip Det sat voltage
CDTHD Clip Det THD level
1. Saturated square wave output
DC On; ICD = 1mA
0.4
%
8/12
TDA7854
Application hints
4
Application hints
4.1
4.2
4.3
SVR
Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF
time sequence and, consequently, plays an essential role in the pop optimization during
ON/OFF transients.To conveniently serve both needs, its minimum recommended value
is 10μF.
Input stage
The TDA7854's inputs are ground-compatible and can stand very high input signals (
8Vpk) without any performances degradation.
If the standard value for the input capacitors (0.1μF) is adopted, the low frequency cut-off
will amount to 16 Hz.
Stand-by and muting
R-C cells have always to be used in order to smooth down the transitions for preventing any
audible transient noise.
About stand-by, the time constant to be assigned in order to obtain a virtually pop-free
transition has to be slower than 2.5V/ms.
A direct connection to Vs of these two pins is admissible but a 470kOhm equivalent
resistance should be present between the power supply and muting and stand-by pins.
4.4
Heatsink definition
Under normal usage (4 Ohm speakers) the heatsink's thermal requirements have to be
deduced from Figure 4, which reports the simulated power dissipation when real
music/speech programmes are played out. Noise with gaussian-distributed amplitude was
employed for this simulation. Based on that, frequent clipping occurrence (worst-case) will
cause P
= 26W. Assuming Tamb = 70°C and TCHIP = 150°C as boundary conditions, the
diss
heatsink's thermal resistance should be approximately 2°C/W. This would avoid any thermal
shutdown occurrence even after long-term and full-volume operation.
Figure 4.
Power dissipation vs. output power (R = 4Ω, audio program simulation)
L
Ptot (W)
30
Vs = 14.4 V
R
L = 4 x 4 Ω
25
20
15
10
5
GAUSSIAN NOISE
CLIP START
0
1
2
3
4
5
6
Po (W)
AC00036
9/12
Package information
TDA7854
5
Package information
®
In order to meet environmental requirements, ST offers this device in ECOPACK packages.
This package has a Lead-free second level interconnect. The category of second level
interconnect is marked on the package and on the inner box label, in compliance with
JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also
marked on the inner box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 5.
Flexiwatt25 mechanical data and package dimensions
mm
inch
TYP. MAX.
4.65 0.175 0.177 0.183
2.00 0.070 0.074 0.079
0.055
DIM.
MIN. TYP. MAX. MIN.
OUTLINE AND
MECHANICAL DATA
A
B
C
D
E
4.45
1.80
4.50
1.90
1.40
0.90
0.39
0.75
0.37
1.05 0.029 0.035 0.041
0.42 0.014 0.015 0.016
F (1)
G
0.57
0.022
0.80
1.00
1.20 0.031 0.040 0.047
G1
23.75 24.00 24.25 0.935 0.945 0.955
H (2) 28.90 29.23 29.30 1.139 1.150 1.153
H1
H2
H3
17.00
12.80
0.80
0.669
0.503
0.031
L (2) 22.07 22.47 22.87 0.869 0.884 0.904
L1 18.57 18.97 19.37 0.731 0.747 0.762
L2 (2) 15.50 15.70 15.90 0.610 0.618 0.626
L3
L4
L5
M
M1
N
O
R
R1
R2
R3
R4
7.70
7.85
5
3.5
4.00
4.00
2.20
2
1.70
0.5
7.95 0.303 0.309 0.313
0.197
0.138
3.70
3.60
4.30 0.145 0.157 0.169
4.40 0.142 0.157 0.173
0.086
0.079
0.067
0.02
0.12
0.049
0.019
0.3
1.25
0.50
V
5˚ (T p.)
3˚ (Typ.)
20˚ (Typ.)
45˚ (Typ.)
Flexiwatt25 (vertical)
V1
V2
V3
(1): dam-bar protusion not included
(2): molding protusion included
V
C
B
V
H
H1
V3
A
H2
R3
H3
R4
V1
R2
N
R
L
L1
V1
V2
D
R2
R1
R1
M
R1
E
L5
Pin 1
G
F
G1
M1
7034862
FLEX25ME
10/12
TDA7854
Revision history
6
Revision history
Table 5.
Date
4-Oct-2007
Document revision history
Revision
Changes
1
Initial release.
11/12
TDA7854
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