TDA8944AJ Datasheet, PDF (1/20 Pages) NXP Semiconductors – 2 x 7 W BTL audio amplifier with DC gain control

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 Ω 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
V_CC
supply voltage
I_q
quiescent supply current
I_stb
standby supply current
P_o
output power
THD total harmonic distortion
Conditions
V_CC = 12 V; R_L = ∞
THD = 10%; R_L = 8 Ω;
V_CC = 12 V
P_o = 1 W
Min Typ Max Unit
4.5 12 18 V
-
40 50 mA
-
-
10 µA
6
7
-
W
-
0.07 0.5 %