Features: · Gain/volume adjustment via a DC control pin
· Soft clipping
· Operating at a low supply voltage
· Standby and mute mode
· No on/off switching plops
· Low standby current
· High supply voltage ripple rejection
· Outputs short-circuit protected to ground, supply and across the load
· Thermally protected
· Printed-circuit board compatible with TDA8946AJ and TDA8580J.Application· Mains fed applications (e.g. TV sound)
· PC audio
· Portable audio.Pinout
Specifications
| SYMBOL |
PARAMETER |
CONDITIONS |
MIN. |
MAX. |
UNIT |
| VCC |
supply voltage |
operating |
-0.3 |
+25 |
V |
| no signal |
-0.3 |
+18 |
V |
| VI |
input voltage |
|
-0.3 |
VCC+0.3 |
V |
| IORM |
repetitive peak output current |
|
- |
2 |
A |
| Tstg |
storage temperature |
operating; note 1 |
-55 |
+150 |
°C |
| Tamb |
operating ambient temperature |
|
-40 |
+85 |
°C |
| Ptot |
total power dissipation |
|
- |
18 |
W |
| VCC(sc) |
supply voltage to guarantee short-circuit
protection |
|
- |
15 |
V |
DescriptionThe TDA8944AJ is a dual-channel audio power amplifier with DC gain control. It has an output power of 2 ´ 7 W at an 8 W load and a 12 V supply. The circuit contains two Bridge-Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The overall gain can be adjusted from +30 dB down to -50 dB using a DC control voltage. This feature can be used for volume control or a preset gain. The TDA8944AJ comes in a 17-pin DIL-bent-SIL (DBS) power package and is pin compatible with the TDA8944J.
The TDA8944AJ is a dual-channel audio power amplifier with DC gain control. It has an output power of 2 ´ 7 W at an 8 W load and a 12 V supply. The circuit contains two Bridge-Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The overall gain can be adjusted from +30 dB down to -50 dB using a DC control voltage. This feature can be used for volume control or a preset gain.The TDA8944AJ comes in a 17-pin DIL-bent-SIL (DBS) power package and is pin compatible with the TDA8944J.
TDA8944AJ has many unique features: The first one is gain/volume adjustment via a DC control pin.The second one is soft clipping.The third one is operating at a low supply voltage.The forth one is standby and mute mode.The fifth one is no on/off switching plops.The sixth one is low standby current.The seventh one is high supply voltage ripple rejection.The eighth one is outputs short-circuit protected to ground, supply and across the load.The ninth one is thermally protected.The tenth one is mains fed applications (e.g. TV sound),etc.
There are some TDA8944AJ specifications.supply voltage(VCC) is 4.5 V min, 12 V typ and 18 V max.quiescent supply current(Iq,VCC = 12 V; RL = infinite) is 40 mA typ and 50 mA max.standby supply current(Istb) is 10 mA max.output power(Po,THD = 10%; RL = 8 W;VCC = 12 V) is 6 W min and 7 W typ.total harmonic distortion(THD,Po = 1 W) is 0.07% typ and 0.5% max.maximum voltage gain(Gv(max)) is 29 dB min, 30 dB typ and 31 dB max.voltage gain control range(Gv(cr)) is 80 dB typ.supply voltage ripple rejection(SVRR) is 55 dB typ.
TDA8944AJ Data Sheet
