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| UTC8227 LOW FREQUENCY POWER AMPLIFIER DESCRIPTION LI NEAR I NTEGRATED CI RCUI T The UTC8227 is the audio power amplifier with built-in two channel developed for portable radio cassette tape recorder with power ON/OFF switch. FEATURES *Wide operating supply voltage: Vcc=5~12V *Low quiescent supply current (Icc=21mA,typical,at Vcc=9V ,Vi=0) *Output power Po=2.50W/CH at Vcc=9V,RL=4ohm ,f=1kHz,Thd=10% *Soft Clip *Built-in Thermal shut-down protection circuit *Stand-by Switch HDIP-12 TEST CIRCUIT SW1 1000F 100F Vcc2 Vcc1 1 12 3 Boot strap 1 100F 1000F Input 1 6 NF1 47F 120 Output 1 5 9 45 30k 0.015F 2 RL Ripple 47F 7 Input 2 NF2 100F 10 11 Boot strap 2 1000F Output 2 8 47F 120 0.015F 45 30k RL TAB Pre GND 4 Power GND YOUW ANG ELECTRONI CO. CS LTD 1 UTC8227 Characteristic Supply Voltage Output Current Power Dissipation(note) Operating Temperature Storage Temperature Note: Value for mounting on PC board LI NEAR I NTEGRATED CI RCUI T Symbol Vcc Io Pd Topr Tstg ABSOLUTE MAXIMUM RATINGS(Ta=25C) Value 20 2.5 4 -20 ~ +75 -55 ~ +150 Unit V A W C C ELECTRICAL CHARACTERISTICS (Ta=25C,Vcc=9V,RL=4,Rg=600,f=1kHz,unless otherwise specified) Characteristic Quiescent current Output Power Total Harmonic Distortion Voltage Gain Input Impedance Output Noise Voltage Ripple Rejection Ratio Cross Talk Input Offset Voltage Standby Current Symbol Icc Po THD Gv1 Gv2 Rin Vno R.R C.T V7,8 Vi=0 Test Conditions THD=10%,RL=4 THD=10%,RL=3 Po=0.4W/CH Rf=120,Vout=0.775Vrms Rf=0,Vout=0.775Vrms Min 2.0 Typ 21 2.5 3.0 0.2 Max 45 Units mA W W 1.0 47 % dB 43 45 56.5 30 Rg=10k,BW=20Hz~20kHz Rg=600 fripple=100Hz 0.3 52 50 30 1.0 mVrms dB dB Rg=600,Vout=0, f=1kHz 60 mV A Sw1:OFF 1 YOUW ANG ELECTRONI CO. CS LTD 2 UTC8227 ICCQ, V2,V10 vs. VCC1 15 15 10 LI NEAR I NTEGRATED CI RCUI T THD vs Output Power Total Harmonic Distortion (%) Cross Talk vs. Frequency Vcc=9V RL=4 RNF=120 Rg=620 Vout=0dBm TYPICAL PERFORMANCE CHARACTERISTICS Vcc1=12V Vin=0 Ta=25k 6V Quiescent current (mA) 12 ICCQ 12 Output Voltage (V) Cross Talk (dB) 9 9 1 Vcc1=9V RL=4 f=1kHz RNF=120 Ta=25k Vcc2=5V 9V 0 -20 6 6 -40 3 V10,V2, 3 -60 0 0 3 6 9 12 15 0 0.1 0.01 0.1 1 10 -80 1 10 2 10 3 10 4 10 5 10 Supply Voltage , Vcc2 (V) Output Power (W) Frequency ( Hz) ICCQ, DC Vout vs. Supply Voltage 100 20 Voltage Gain vs. Frequency Ripple Rejection vs. frequency Vin=0 Quiescent current (mA) 80 16 80 Output Voltage (V) Voltage Gain (dB) Voltage Gain (dB) Vcc=9V RL=4 RNF=120 0 60 12 60 -20 Vcc=9V RL=4 RNF=120 Rg=620 Vout 40 8 40 -40 20 ICCQ 4 20 -60 0 0 5 10 15 20 25 0 0 1 10 2 10 3 10 4 10 5 10 -80 1 10 2 10 3 10 4 10 5 10 Supply Voltage , Vcc2 (V) Frequency ( Hz) Frequency ( Hz) APPLICATION INFORMATION 1.Input Voltage When the excessive signal is input, turning-up is produced in the clip waveform. The turning-up point is Vin=300mVrms(Typical) at Vcc=9V,RL=4 f=1kHz. Enough care must be taken for this phenomenon. 2.Power ON/OFF There is power ON/OFF switch at pin 1. However output power is changed by pin 1 supply voltage when pin1 supply voltage is not same pin 12 supply voltage, after referring to attached date, select pin 1 supply voltage. 3.Voltage Gain The voltage gain can be changed by the external negative feedback resistor. When Rf=0, the Gain is equal to 56.5dB.When Rf=120 the Gain is equal to 45dB. YOUW ANG ELECTRONI CO. CS LTD 3 |
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