audio amplifier. TDA8944AJ Datasheet

TDA8944AJ amplifier. Datasheet pdf. Equivalent

TDA8944AJ Datasheet
Recommendation TDA8944AJ Datasheet
Part TDA8944AJ
Description 2 x 7 W BTL audio amplifier
Feature TDA8944AJ; TDA8944AJ 2 x 7 W BTL audio amplifier with DC gain control Rev. 01 — 01 March 2002 M3D541 Product .
Manufacture Philips
Datasheet
Download TDA8944AJ Datasheet




Philips TDA8944AJ
TDA8944AJ
2 x 7 W BTL audio amplifier with DC gain control
Rev. 01 — 01 March 2002
M3D541
Product data
1. General description
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 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.
2. Features
s Gain/volume adjustment via a DC control pin
s Soft clipping
s Operating at a low supply voltage
s Standby and mute mode
s No on/off switching plops
s Low standby current
s High supply voltage ripple rejection
s Outputs short-circuit protected to ground, supply and across the load
s Thermally protected
s Printed-circuit board compatible with TDA8946AJ and TDA8580J.
3. Applications
s Mains fed applications (e.g. TV sound)
s PC audio
s Portable audio.
4. Quick reference data
Table 1: Quick reference data
Symbol Parameter
VCC supply voltage
Iq quiescent supply current
Istb standby supply current
Po output power
THD total harmonic distortion
Conditions
VCC = 12 V; RL =
THD = 10%; RL = 8 ;
VCC = 12 V
Po = 1 W
Min Typ Max Unit
4.5 12 18 V
- 40 50 mA
- - 10 µA
67-
W
- 0.07 0.5 %



Philips TDA8944AJ
Philips Semiconductors
TDA8944AJ
2 x 7 W BTL audio amplifier with DC gain control
Table 1: Quick reference data…continued
Symbol Parameter
Conditions
Gv(max) maximum voltage gain
Gv(cr) voltage gain control range
SVRR supply voltage ripple
rejection
Min Typ Max Unit
29 30 31 dB
- 80 - dB
- 55 - dB
5. Ordering information
Table 2: Ordering information
Type number Package
Name
Description
Version
TDA8944AJ DBS17P plastic DIL-bent-SIL power package; 17 leads (lead SOT243-1
length 12 mm)
6. Block diagram
idth VCC1 VCC2
3 16
IN1
IN1+
8
6
1 OUT1
4
OUT1+
13
GC
TDA8944AJ
IN2
IN2+
MODE
SVR
14
9
12
17
10 STANDBY/
MUTE LOGIC
11
VCC
20
k
20
k
SHORT CIRCUIT
AND
TEMPERATURE
PROTECTION
7
SGND
2 15
GND1 GND2
MGW587
OUT2
OUT2+
Fig 1. Block diagram.
9397 750 09433
Product data
Rev. 01 — 01 March 2002
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
2 of 20



Philips TDA8944AJ
Philips Semiconductors
7. Pinning information
7.1 Pinning
TDA8944AJ
2 x 7 W BTL audio amplifier with DC gain control
9397 750 09433
Product data
handbook, halfpage
OUT11
GND1 2
VCC1 3
OUT1+ 4
n.c. 5
IN1+ 6
SGND 7
IN18
IN29 TDA8944AJ
MODE 10
SVR 11
IN2+ 12
GC 13
OUT214
GND2 15
VCC2 16
OUT2+ 17
MGW588
Fig 2. Pin configuration.
7.2 Pin description
Table 3:
Symbol
OUT1
GND1
VCC1
OUT1+
n.c.
IN1+
SGND
IN1
IN2
MODE
SVR
IN2+
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Description
negative loudspeaker terminal 1
ground channel 1
supply voltage channel 1
positive loudspeaker terminal 1
not connected
positive input 1
signal ground
negative input 1
negative input 2
mode selection input (standby, mute, operating)
half supply voltage decoupling (ripple rejection)
positive input 2
Rev. 01 — 01 March 2002
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
3 of 20







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