SGS Thomson Microelectronics TDA7250 Datasheet
.WIDESUPPLYVOLTAGERANGE: 20TO90V
(± 10 to ± 45V)
.VERY LOW DISTORTION
.AUTOMATICQUIESCENTCURRENT
CONTROL FOR THE POWER TRANSISTORS
WITHOUTTEMPERATURESENSE
ELEMENTS
.OVERLOAD CURRENT PROTECTION FOR
THEPOWERTRANSISTORS
.MUTE/STAND-BYFUNCTIONS
.LOW POWER CONSUMPTION
.OUTPUTPOWER60 W/8Ω AND100 W/4Ω
DESCRIPTION
The TDA7250 stereo audio driver is designed to
drivetwo pair ofcomplementaryoutputtransistor in
the Hi-Fipower amplifiers.
TDA7250
60 W HI-FIDUAL AUDIO DRIVER
DIP20
ORDERING NUMBER : TDA7250
APPLI CATI O N CIR CUIT
March 1995
1/11
TDA7250
PIN CONNECTI O N (top view)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Supply Voltage 100 V
V
s
P
T
j,Tstg
Power Dissipation at T
tot
Storage and Junction Temperature – 40 to + 150 °C
=60°C 1.4 W
amb
THERMAL DATA
Symbol Parameter Value Unit
R
2/11
th j-amb
Thermal Resistance Junction-ambient Max. 65 °C/W
TDA7250
PIN FUNCTIONS
N° Name Function
1V
2 NON–INV. INP. CH. 1 Channel 1 Input Signal.
3 QUIESC. CURRENT
4 SENSE (–) CH. 1 Negative voltage sense input for overload protection and for automatic quiescent
5 ST. BY / MUTE / PLAY Three-functions Terminal.
6 CURRENT PROGRAM High Impedance Power-stages Monitor.
7 SENSE (–) CH. 2 Negative Voltage Sense Input for Overload Protection and for Automatic
8 QUIESC. CURRENT
9 NON–INV. INP. CH. 2 Channel 2 Input Signals.
10 V
11 INVERT. INP. CH. 2 Feedback from Output (channel 2).
12 OUT (–) CH. 2 Out Signal to Lower Driver Transistor of Channel 2.
13 OUT (+) CH. 2 Out Signal to Higher Driver Transistor of Channel 2.
14 SENSE (+) CH. 2 Positive Voltage Sense Input for Overload Protection and for Automatic
15 COMMON AC GROUND AC Input Ground in MUTE Condition.
16 V
17 SENSE (+) CH. 1 Positive Voltage Sense Input for Overload Protection and for Automatic
18 OUT (+) CH. 1 Out Signal to High Driver Transistor of Channel 1.
19 OUT (–) CH. 1 Out Signal to Low Driver Transistor of Channel 1.
20 INVERT. INP. CH. 1 Feedback from Output (channel 1).
– POWER SUPPLY Negative Supply Voltage.
S
This capacitor works as an integrator, to control the quiescent current to output
CONTR. CAP. CH1
devices in no-signal conditions on channel 1.
current control.
For V
= 1 to 3 V, the device is in MUTE and only quiescent current flows in
IN
the power stages ; - for V
quiescent current is present in the power stages ; - for V
Quiescent Current Control.
This capacitor works as an integrator, to control the quiescent current to output
CONTR. CAP. CH. 2
devices in no-signal conditions on channel 2. If the voltage at its terminals drops
under 250 mV, it also resets the device from high-impedance state of output
stages.
– POWER SUPPLY Negative Supply Voltage.
s
Quiescent Current Control.
+ POWER SUPPLY Positive Supply Voltage.
S
Quiescent Current Control.
< 1 V, the device is in STAND-BY mode and no
IN
> 3 V, the devic
IN
3/11
TDA7250
BLOCK DIAGRAM
4/11
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