TDA7350A, Elektronika i elektryka, Serwisówki
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TDA7350A
22W BRIDGE-STEREO AMPLIFIER FOR CAR RADIO
1
General Features
Figure 1. Package
VERY FEW EXTERNAL COMPONENTS
■
NO BOUCHEROT CELLS
■
NO BOOSTRAP CAPACITORS
■
HIGH OUTPUT POWER
■
NO SWITCH ON/OFF NOISE
■
VERY LOW STAND-BY CURRENT
Multiwatt11
■
FIXED GAIN (30dB STEREO)
■
PROGRAMMABLE TURN-ON DELAY
Table 1. Order Codes
■
Part Number
Package
1.1
PROTECTIONS
TDA7350A
Multiwatt11
OUTPUT AC-DC SHORT CIRCUIT TO
GROUND AND TO SUPPLY VOLTAGE
■
dio Power Amplifier in the Multiwatt® package de-
signed for car radio applications.
Thanks to the fully complementary PNP/NPN out-
put configuration the high power performance of
the TDA7350A is obtained without bootstrap ca-
pacitors.
A delayed turn-on mute circuit eliminates audible
on/off noise, and a novel short circuit protection
system prevents spurious intervention with highly
inductive loads.
VERY INDUCTIVE LOADS
■
LOUDSPEAKER PROTECTION
■
OVERRATING CHIP TEMPERATURE
■
LOAD DUMP VOLTAGE
■
FORTUITOUS OPEN GROUND
■
ESD
■
2 Description
The TDA7350A is a new technology class AB Au-
Figure 2. Application Circuit (Bridge)
Rev. 1
February 2005
1/23
TDA7350A
Figure 3. Pin connection
(Top view)
Table 2. Absolute Maximum Ratings
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
18
V
V
S
DC Supply Voltage
28
V
V
S
Peak Supply Voltage (t = 50ms)
40
V
I
O
Output Peak Current (non rep. t = 100
µ
s)
5
A
I
O
Output Peak Current (rep. freq. > 10Hz)
4
A
P
tot
Power Dissipation at T
case
= 85°C
36
W
T
stg
, T
j
Storage and Junction Temperature
-40 to 150
°C
Table 3. Thermal Data
Symbol
Parameter
Value
Unit
R
thj-case
Thermal Resistance Junction-case
Max.
1.8
°C/W
Table 4. Electrical Characteristcs
(Refer to the test circuits, T
amb
= 25°C, V
S
= 14.4V, f = 1KHz unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
8
18
V
I
d
Total Quiescent Drain Current
stereo configuration
120
mA
A
SB
Stand-by attenuation
60
80
dB
I
SB
Stand-by Current
100
µA
T
sd
Thermal
Shut-down
Junction
150
°C
Temperature
2/23
TDA7350A
Table 4. Electrical Characteristcs
(continued)
(Refer to the test circuits, T
amb
= 25°C, V
S
= 14.4V, f = 1KHz unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
STEREO
P
o
Output Power (each channel)
d = 10%
R
L
= 2
Ω
R
L
= 3.2
11
8
6.5
W
W
W
7
Ω
R
L
= 4
Ω
d = 10%; V
S
= 13.2V
R
L
= 2
9
6.5
5.5
W
W
W
Ω
R
L
= 3.2
Ω
R
L
= 4
Ω
d
Distortion
Po = 0.1 to 4W; R
L
= 3.2
Ω
0.5
%
SVR
Supply Voltage Rejection
R
g
= 10k
Ω
f = 100Hz
45
50
57
dB
dB
C3 = 22µF
C3 = 100µF
C
T
Crosstalk
f = 1KHz
f = 10KHz
45
55
50
dB
dB
R
I
Input Resistance
30
50
K
Ω
G
V
Voltage Gain
27
29
31
dB
G
V
Voltage Gain Match
1
dB
E
IN
Input Noise Voltage
R
g
= 50
Ω
(*)
1.5
2
2
2.7
7
µV
µV
µV
µV
R
g
= 10K
Ω
(*)
R
g
= 50
Ω
(**)
R
g
= 10K
Ω
(**)
BRIDGE
P
o
Output Power
d = 10%; R
L
= 4
d = 10%; R
L
= 3.2
Ω
16
20
22
W
W
Ω
d = 10%; V
S
= 13.2V
R
L
= 4
17.5
19
W
W
R
L
= 3.2
Ω
Ω
d
Distortion
P
o
= 0.1 to 10W; R
L
= 4W
1
%
V
OS
Output Offset Voltage
250
mV
SVR
Supply Voltage Rejection
R
g
= 10k
Ω
f = 100Hz
45
50
57
dB
dB
C3 = 22µF
C3 = 100µF
R
I
Input Resistance
50
K
Ω
G
V
Voltage Gain
33
35
37
dB
E
IN
Input Noise Voltage
R
g
= 50
Ω
(*)
2
2.5
2.7
3.2
µV
µV
µV
µV
R
g
= 10K
(*)
Ω
R
g
= 50
Ω
(**)
R
g
= 10K
Ω
(**)
(*) Curve A
(**) 22Hz to 22KHz
3/23
TDA7350A
Figure 4. STEREO Test and Appication Circuit
Figure 5. P.C. Board and Layout (STEREO) of the circuit of fig. 4
4/23
TDA7350A
Figure 6. BRIDGE Test and Appication Circuit
Figure 7. P.C. Board and Layout (BRIDGE) of the circuit of fig. 6
5/23
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