TDA8944AJ 查看數據表（PDF） - NXP Semiconductors.

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TDA8944AJ

2 x 7 W BTL audio amplifier with DC gain control

NXP Semiconductors. 

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

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 Ω;

VCC = 12 V

Po = 1 W

Min Typ Max Unit

4.5 12 18 V

-

40 50 mA

-

-

10 µA

6

7

-

W

-

0.07 0.5 %

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