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32W BRIDGECAR RADIO AMPLIFIER
HIGHPOWER CAPABILITY:
40W/3.2Ω EIAJ
32W/3.2Ω @V
26W/4Ω @V
DIFFERENTIAL INPUTS (EITHER SINGLE
ENDED OR DIFFERENTIAL INPUT SIGNAL
ARE ACCEPTED)
MINIMUMEXTERNALCOMPONENTCOUNT:
- NOBOOTSTRAPCAPACITORS
- NOBOUCHEROT CELLS
- INTERNALLYFIXEDGAIN(30dB)
- NOSVRCAPACITOR
ST.-BYFUNCTION (CMOS COMPATIBLE)
PROGRAMMABLETURN-ON/OFF DELAY
NO AUDIBLE POP DURING MUTE AND ST-
BY OPERATIONS
PROTECTIONS:
SHORT CIRCUIT (TO GND, TO V
THE LOAD)
VERYINDUCTIVE LOADS
CHIP OVERTEMPERATURE
LOADDUMP
OPENGND
ESD
S =14.4V,f = 1KHz,d = 10%
S= 14.4V, f = 1KHz, d =10%
ACROSS
S,
TDA7391PD
PRODUCT PREVIEW
PowerSO20
ORDERING NUMBER: TDA7391PD
DESCRIPTION
The TDA7391PD is a BRIDGE class AB audio
power amplifier specially intended for car radio
High Power applications.
The high power capabilitytogether withthe possibility to operate either in DIFFERENTIAL INPUT
MODE or SINGLEENDED INPUT MODE makes
it suitable for boosters and high end car radio
equipments.
The exclusive fully complementary output stage
and the internal fixed gain configuration drop the
externalcomponentcount.
The on board clipping detectorallowseasy implementationof gain compressionsystems.
Figure 1: Test AndApplicationCircuit
+V
S
C4 1000µF
Vref
R1
4.7KΩ
TO µC
D98AU871
R2
C5 100nF
2
19
17
GND
OUT+
OUT-
CD
C2 0.22µF
IN+
C1 0.22µF
IN-
V
S
SW1
October 1998
This is preliminaryinformationon anew product now in development. Details are subject tochange without notice.
ST-BY
C3
33µF
516
15
14
TDA7391PD
4
12
9
8 1,10,11,20
56KΩ
1/8
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TDA7391PD
Figure 2: BlockDiagram
+
-
STANDBYTHRESHOLD
14
IN-
15
IN+
V
CC1VCC2
516
ICM
gm
+
COMMON
MODE
REFERENCES
-
+
V
CC/2
POWERAMP
LTS V=f (Tj)
POWERAMP
THD
DETECT
SHORT
DUMP &
PROTECTION
V
S
CIRCUIT
THERMAL
L
DISABLE
TS
19
OUT-
17
CD
2
OUT+
+
-
MUTE THRESHOLD
MUTE SYNC S-GND STANDBY
PIN CONNECTION(Topview)
P-GND
OUT+
ST-BY
SYNC
MUTE S-GND
P-GND P-GND
PROGRAMMABLE
CURRENT CIRCUIT
894
N.C.
VCC
N.C.
N.C.
2
3
4
5
6
7
8
9
10
12
20
19
18
17
16
15
14
13
1,10,11,20
P-GND
P-GND1
OUTN.C.
CD
VCC
IN+
INN.C.
D98AU872
12
11
D98AU873
THERMAL DATA
Symbol Description Value Unit
Thermal Resistance Junction-case Max 2 °C/W
2/8
R
th j-case
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TDA7391PD
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
PEAK
P
T
stg,Tj
OP
I
O
tot
DC Supply Voltage 28 V
S
Operating Supply Voltage 18 V
Peak Supply Voltage (t= 50ms) 50 V
Output Peak Current repetitive(f > 10Hz)
Output Peak Current non repetitive
Power Dissipation (T
=85°C) 32 W
CASE
4.5
6
Storage and Junction-Case Temperature -40 to 150
A
A
C
°
ELECTRICAL CHARACTERISTICS (VS= 14.4V; RL=4Ω, f = 1KHz, T
=25°C, unless otherwise
amb
specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
q
V
OS
I
SB
I
SBin
V
SBon
V
SBoff
ATT
ST-BY
I
Min
A
M
P
O
d Distortion
G
V
f
H
R
IN
E
IN
CMRR Input Common Mode Rejection f = 1KHz; V
SVR Supply Voltage Rejection R
CDL Clipping Detection Level 5 10 15 %
T
sd
Supply Voltage Range 8 18 V
Total Quiescent Current 60 150 mA
Output Offset Voltage 120 mV
ST-BY Current V
ST-BY Input Bias Current V
= 1.5V 100
ST-BY
=5V 10
ST-BY
ST-BY On ThresholdVoltage 1.5 V
ST-BY Off thresholdVoltage 3.5 V
ST-BY Attenuation 90 dB
Mute Input BiasCurrent (V
= 5V) 10
MUTE
Mute Attenuation 90 dB
RMS Output Power d = 10%
d=1%
d = 10%;R
EIAJ Output Power V
= 13.7V 40 W
S
= 3.2Ω
L
20 26
21
32
0.06
P
= 0.1 to 15W
O
0.03
Voltage Gain 29.5 30 30.5 dB
High Frequency rolloff PO= 1W; -3dB 75 KHz
Input Impedance Differential 36 60 K
Single Ended 30 55 KΩ
Input Noise Voltage Rg=0Ω;f= 22Hz to 22KHz 4 mV
= 1Vrms 65 dB
IN
=0Ω;Vr= 1Vrms 60 dB
g
Absolute Thermal Shutdown
160
Junction Temperature
A
µ
A
µ
A
µ
W
W
W
%
%
Ω
C
°
3/8