Thick Film Hybrid IC INCHANGE STK4142Ⅱ AF Power Amplifier (Split Power Supply) Features Package Dimensions ﹒the STK4142Ⅱ series and STK4101V series (high-grade type) are pin-campatible in the output range of 6 to 50W and enable easy design ﹒Built-in muting circuit to cut off various kinds of pop noise ﹒Greatly reduced heat sink due to substrate temperature125℃ guaranteed ﹒Excellent cost performance unit:mm Specifications Maximum Ratings at Ta=25℃ Parameter Maximum supply voltage Ratings ±39 UNIT V θj-c 2.6 ℃/W Junction temperature Tj 150 ℃ Operating substrate temperature Tc 125 ℃ Tstg -30 to+125 ℃ 2 s Thermal resistance Storage temperature Available time for load short-circuit Symbol VCC max ts Conditions VCC=±26V,RL=8Ω,f=50Hz,PO=25W Recommended operating conditions at Ta=25℃ Parameter Recommended supply voltage Load resistance Symbol VCC Conditions RL Ratings ±26 UNIT V 8 Ω Operating characteristics at Ta=25℃,VCC=±26V,RL=8Ω,Rg=600Ω,VG=40dB, Parameter Quiescent current Output power Total harmonic distortion Frequency response Input impedance RL:non-inductive load Symbol Conditions VCC=±31V ICCO THD=0.4% PO (1) f=20Hz to 20kHz VCC=±22V,THD=1.0% PO (2) RL=4Ω,f=1kHz THD PO=1.0W,f=1kHz +0 fL, fH PO=1.0W, dB -3 rj PO=1.0W,f=1kHz Output noise voltage VNO VCC=±31V,Rg=10 kΩ Neutral voltage VN VCC=±31V Muting voltage VM min 20 typ 40 max 100 unit mA 25 W 25 W 0.3 % 20 to 50k Hz 55 kΩ 1.2 mVrms -70 0 +70 mV -2 -5 -10 V