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 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 67- W - 0.07 0.5 % Philips Semiconductors TDA8944AJ 2 x 7 W BTL au...