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UNISONIC TECHNOLOGIES CO., LTD TA8227AP LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 8 Copyright © 2014 Unisonic Technologies Co., Ltd QW-R107-021.F LOW FREQUENCY POWER AMPLIFIER DESCRIPTION The UTC TA8227AP is an audio power IC with built-in two channels developed for portable radio cassette tape recorder with power ON / OFF switch. Thermal shut down protection circuit is built in. FEATURES * Wide operating supply voltage: VCC=5~12V * Low popping noise at power ON * Best for supply voltage 9V * Output power P OUT=2.5W/CH at Vcc=9V, RL=4, f=1kHz, THD=10% POUT=3.0W/CH at Vcc=9V, RL=3, f=1kHz, THD=10% * Soft Clip * Built-in thermal shut-down protection circuit * Stand-by switch ORDERING INFORMATION Ordering Number Package Packing TA8227APG-D12-H-T DIP-12H Tube TA8227APG-S20-R SOP-20 Tape Reel MARKING DIP-12H SOP-20
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 9 www.unisonic.com.tw QW-R107-021.F PIN CONFIGURATION VCC2 OUT1 B.S.1 PRE-GND NF1 IN1 VCC1 OUT2 B.S.2 RIPPLE NF2 IN2 6 7 VCC2 OUT1 B.S.1 PW-GND PW-GND PW-GND PW-GND PRE-GND NF1 IN1 VCC1 OUT2 B.S.2 PW-GND PW-GND PW-GND PW-GND RIRPLE NF2 IN2 10 11 D I P - 1 2 H S O P - 2 0 BLOCK DIAGRAM FIN
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 9 www.unisonic.com.tw QW-R107-021.F ABSOLUTE MAXIMUN RATINGS (TA=25C, unless otherwise specified) PARAMETER SYMBOL VALUE UNIT Supply Voltage V CC 20 V Output Current (peak / CH) I O(PEAK) 2.5 A Power Dissipation P D 4.0 W Operating Temperature T OPR -25~+75 C Storage Temperature T STG -55~+150 C ELECTRICAL CHARACTERISTICS (TA=25C, VCC=9V, RL=4Ω, RG=600Ω, f=1kHz, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Quiescent Current I CCQ V IN=0 21 45 mA Output Power POUT(1) POUT(2) THD=10% THD=10%, RL=3Ω 2.0 2.5 3.0 W Total Harmonic Distortion THD P OUT=0.4W/CH 0.2 1.0 % Voltage Gain Gv1 Rf=120 Ω,VOUT=0.775Vrms (0 dBm) 43 45 47 dB Gv2 Rf=0, V OUT=0.775Vrms (0 dBm) 56.5 dB Input Impedance R IN 30 k Ω Output Noise Voltage eN Rg=10k Ω,BW=20Hz ~20kHz 0.3 1.0 mVrms Ripple Rejection Ratio R.R. Rg=600 Ω, fripple=100Hz -52 dB Cross Talk C.T Rg=600 Ω,VOUT=0.775Vrms (0 dBm) -50 dB Input Offset Voltage V6, V7 30 60 mV Standby Current 1stb Sw1:OFF 1 50 μA TYP. DC VOLTAGE OF EACH TERMINAL (VCC=9V, TA=25C, unless otherwise specified) TERMINAL NO. 1 2 3 4 5 6 7 8 9 10 11 12 APPLICATION INFORMATION AND APPLICATION METHOD 1. Adjustment of voltage gain The voltage gain Gv is obtained as follows by R1, R2 and Rf in Fig.1 21log20 RR RRRG f f V When Rf = 0Ω Gv=56.5 dB (Typ.) When Rf = 120Ω Gv=45 dB (Typ.) By increasing Rf, reduction of Gv is possible. However, since the feedback increase is liable to produce oscillation, it is recommended to use this at 40dB or over. 30kΩ Ch-2 45Ω CNF 47μF Rf INPUT OUTPUT Fig.1 (10/11) (9/12) (2/19) ( ): For SOP-20 Package
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 9 www.unisonic.com.tw QW-R107-021.F APPLICATION INFORMATION AND APPLICATION METHOD(Cont.) 2. Thermal shut-down circuit The thermal shut-down circuit is built in for the purpose of preventing the destruction of IC due to the abnormal temperature rise when the heat radiation is insufficient. The operation temperature is set at radiation Fin temperature 175C (Typ.) At this temperature or over the bias is interrupted to prevent the destruction of IC. 3. Input stage The input circuit of this IC is as shown in fig.2. PNP Tr : Q1 is provided in the input circuit so as to make its usage possible without the input coupling capacitor. However, at pin 6 and pin 7, max 60mV offset voltage is produced. Application after checking volume slide noise is recommended. For cutting the volume slide noise, insert the input capacitor: CIN in series to interrupt the DC component. 4. Oscillation preventive measures For oscillation preventive capacitor C6 and C7 between the output terminal and GND, it is recommended to use polyester film capacitor having good characteristics for temperature and for high frequency. Since the characteristics of the capacitor is liable to be in fluenced by the temperature, use this capacitor after the temperature test to check the oscillation allowance. In addition, as the position of the electrolytic capacitor has a remarkable influence on the oscillation, connect C10 to Vcc at the nearest possible position from power GND. At using this application wth the voltage gain reduced, oscillation is liable to be produced. Apply the capacitor after checking enough for its capacity, type and mounting position. 5. Power ON / OFF switch There is power ON / OFF switch at Pin1. However, output power is changed by Pin1 supply voltage when Pin1 supply voltage is not same Pin12 supply voltage, after referring to attached date, select Pin1 supply voltage. 6. Input voltage When the excessive signal is input, turning-up is prod uced in the clip waveform. The turning-up point is V IN=300mVrms (Typ.) : VCC=9V, RL=4Ω, f=1kHz : Enough care must be taken for this phenomenon.
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 9 www.unisonic.com.tw QW-R107-021.F TEST CIRCUIT FIN Notes: 1. This IC can be used without coupling capacitor (C IN). If volume slide noise noise occurred by input offset voltage is undesirable, it needs to use the capacitor (CIN). 2. The condenser between the pin4 and the GND (C11) is for reducing pop noise when the power ON / OFF switch (SW1) is set to ON / OFF.
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 of 9 www.unisonic.com.tw QW-R107-021.F TYPICAL CHARACTERISTICS VCC1=12V VIN=0 TA=25°C ICCQ2, V2, V11 – VCC2 Supply Voltage, VCC2 (V) 02 46 8 1 0 1 2 14 ICCQ V2, V11 VCC1=9V RL=4Ω F=1kHz R NF=120Ω TA=25°C THD – POUT 0.5 0.1 0.3 0.01 0.03 0.1 0.3 1 3 10 VCC2=5V Output Power, POUT (W) 0.5 0.4 0.3 0.2 0.1 -40 -20 0 20 40 60 80 100 THD – TA Ambient Temperature, TA (°C) ICCQ2, V2, V11 – VCC2 -40 -20 0 20 40 60 80 Ambient Temperature, TA (°C) 50 10 20 15 ICCQ V2, V11 ICCQ VOUT ICCQ2, VOUT – VCC Supply Voltage, VCC2 (V)
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 7 of 9 www.unisonic.com.tw QW-R107-021.F TYPICAL CHARACTERISTICS(Cont.) THD – POUT THD – POUT Output Power, POUT (W)Output Power, POUT (W) Signal Source Resistance Rg (Ω) 100 0.3 0.1 0.01 0.1 0.3 1 3 10 30 GV -f 30 100 1k 10k 100k Frequency, f (Hz) Frequency, f (Hz) 30 100 1k 10k 100k -20 -40 -60 -80 C.T. - f R.R. - Rg -20 -40 -60 -80 30 100 1k 10k 100k VCC=9V RL=4Ω RNF=120Ω f=1kHz RL=4Ω RNF=120Ω 100 0.3 0.1 0.01 0.1 0.3 1 3 10 VCC=9V RL=4Ω RNF=120Ω VCC=9V RL=4Ω Rg=600Ω RNF=120Ω VOUT=0.775Vrms (0dBm) VCC=9V RL=4Ω RNF=120Ω f=100Hz f=10kHz 1kHz 100Hz VCC=6V
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 8 of 9 www.unisonic.com.tw QW-R107-021.F TYPICAL CHARACTERISTICS(Cont.) Cross Talk C.T. (dB) Output Noise Voltage Vno (mVrms) VCC -P out Supply Voltage VCC (V) 01 1 1 5 1 9 PD -P out Output Power Pout (W) 03 5 7 f = 1kHz THD = 10% 7 9 13 17 RL = 6Ω VCC = 12V RL = 4Ω f = 1kHz 642 PD -P out Output Power Pout (W) Power Dissipation PD (W) 03 4 6 RL = 6Ω VCC = 12V f = 1kHz
TA8227AP LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 9 of 9 www.unisonic.com.tw QW-R107-021.F UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.