W20NB50 Datasheet | STMicroelectronics

features due to the temperature rise at the high output can also be reduced. This stereo audio power IC, designed for car audio use, has two built- in channels to reduce the characteristic difference between L and R channels. It also contains various kind of protection. TA8221AHQ TA8221ALQ Features - - Low thermal resistance : θj- T = 1.5°C / W (infinite heat sink) High power : POUT (1) = 30W (typ.) / channel (VCC = 14.4V, f = 1k Hz, THD = 10%, RL =2Ω) POUT (2) = 26W (typ.) / channel (VCC = 13.2V, f = 1k Hz, THD = 10%, RL = 2Ω) POUT (3) = 19W (typ.) / channel (VCC = 13.2V, f = 1k Hz, THD = 10%, RL = 4Ω) - - - - - - Low distortion ratio: THD = 0.04% (typ.) (VCC = 13.2V, f = 1k Hz, POUT = 1W, RL = 4Ω, GV = 50d B) Low noise: VNO = 0.30m Vrms (typ.) (VCC = 13.2V, RL = 4Ω, GV 50d B, Rg = 0Ω, BW = 20Hz~20k Hz) Built- in stand- by function (with pin(4) set at low, power is turned off.): ISB = 100µA (typ.) Built- in muting function (with pin(1) set at low, power is turned off.) Built- in various protection circuits Protection circuits: Thermal shut down, Over voltage, Out→VCC short, Out→GND short and Out- Out short. Operating supply voltage: VCC (opr) = 9~18V Weight HZIP17- P- 2.00 : 9.8g (typ.) HSIP17- P- 2.00 : 9.8g (typ.) 2004-09-28 Free Datasheet http://.. TA8221AHQ / ALQ Block Diagram TA8221AHQ, TA8221ALQ (GV = 50d B) Cautions And Application Method 1. Voltage gain adjustment (description is made only on the single channel.) This IC has the amplifier construction as shown Fig.1. The pre- amp (amp 1) is provided to the primary stage, and the input voltage is amplified by the flat amps, amp 3 and amp 4 of each channel through the phase amp (amp 2). Since the input offset is prevented by pre- amp when VCC is set to on, this circuit can remarkably reduce the pop noise. 2004-09-28 Free Datasheet http://.. TA8221AHQ / ALQ The total closed loop gain GV of this IC can be obtained by expression below when the closed loop voltage gain of amp 1 is GV1. G V1 = 20log R1 + (Rf + R2) (d B)...