UTC2025 LINEAR INTEGRATED CIRCUIT STEREO AUDIO AMPLIFIER DESCRIPTION The UTC2025 is a monolithic integrated audio amplifier in a 16-pin plastic dual in line package. It is designed for portable cassette players and radios. FEATURES *Working Voltage down to 3V *Few External components *High Channel isolation *Voltage gain up to 45dB(Adjustable with external resistor) *Soft clipping *Internal Thermal protection DIP-16 BLOCK DIAGRAM 9 10 11 12 13 14 15 50Ω 10kΩ THERMAL PROTECT START CIRCUIT 5kΩ 8 16 DECOUPLING 50Ω 7 1 10kΩ 50Ω 6 5 4 3 2 ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Output Peak Current Junction Temperature Storage Temperature Symbol Value Unit VS IO Tj Tstg 15 1.5 150 -40+150 V A YOUW ANG ELECTRONICS CO.LTD ° ° 1 UTC2025 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Tamb=25°,VCC=9V,Stereo,Unless otherwise specified) Parameter Symbol Test conditions Supply Voltage Quiescent Current Quiescent output voltage Voltage gain VS IQ VO AV Voltage gain difference Input impedance ∆AV Ri Output Power Distortion PO d Supply voltage Rejection Input noise Voltage Cross-Talk SVR Vn C.T. Stereo Bridge f=1kHz;d=10% Stereo per channel VCC=9V;RL=4Ω RL=8Ω VCC=6V;RL=4Ω RL=8Ω VCC=3V;RL=4Ω Bridge VCC=9V;RL=8Ω VCC=6V;RL=4Ω VCC=9V;RL=4Ω f=1kHz;PO=250mW Stereo Bridge RG=0;AV=45dB Vripple=150mVRMS Fripple=100Hz AV=200 Bandwidth: 20Hz to 20kHz RG=0 RG=10kΩ RG=10kΩ; f=1kHz;RL=4Ω PO=1W Min Typ Max Unit 3 43 49 40 4.5 45 51 30 12 50 47 53 ±1 V mA V dB 1.7 0.7 2.3 1.3 1 0.6 0.1 4.7 2.8 - 0.3 0.5 1.5 - % 40 46 - dB 40 1.5 3 55 3 6 - µV dB kΩ W dB THERMAL RESISTANCE Rth(j-c):Junction to case thermal resistance 15° /W Rth(j-a):Junction to ambient thermal resistance 60° /w YOUW ANG ELECTRONICS CO.LTD 2 UTC2025 LINEAR INTEGRATED CIRCUIT 12 11 10 9 5 6 7 8 GND EEDBACK IN.2 (+) SVR GND (sub 13 4 GND IN.1 (+) BOOT.1 GND 14 3 BOOT.2 GND OUT.1 15 2 OUT.2 +Vs 16 1 BRIDGE FEEDBAC PIN CONNECTION TYPICAL PERFORMANCE CHARACTERISTICS Distortion versus output power d(%) Distortion versus output power d(%) 10 1 Vcc=6V RL=8Ω Vcc=6V RL=40Ω 1 0.1 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 P0(W) P0(W) Distortion versus output Frequency Output power/versus supply voltage 8 10 d(%) Po(W) 6 Vcc=9V RL=9Ω Po=1.5W f=1kHz d=10% RL=4Ω 4 1 2 0.1 0 10 100 1k 10k f(Hz) 100k 0 4 YOUW ANG ELECTRONICS CO.LTD 8 12 Vcc(V) 3 UTC2025 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUITS Vcc Vcc 100µF 100µF 0.22µF 16 10 Vin 100µF 10 100µF 7 RL 8 100µF 470µF 15 11 0.15µF 3 100µF 5 RL 470µF 2 0.15µF 0.15µF 8 4,5,9,12,13 100µF OUT1 100µF 7 Vin 2 2 1 14 0.22µF 100µF 3 100µF 16 Vin 1 0.15µF 5 100µF 0.22µF 14 15 11 100µF OUT2 RL 4,5,9,12,13 Fig.6 Stereo Application Fig. 5 Bridge Application SCHEMATIC DIAGRAM 8 7 I2+ 6 I2+Vs 16 3 OUT 2 2 GND 4 9 5 I1+ 10 11 I114 OUT 1 15 12 1 13 YOUW ANG ELECTRONICS CO.LTD 4