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TEA2025AH Dataheets PDF



Part Number TEA2025AH
Manufacturers UTC
Logo UTC
Description STEREO AUDIO AMPLIFIER
Datasheet TEA2025AH DatasheetTEA2025AH Datasheet (PDF)

UNISONIC TECHNOLOGIES CO.,LTD. TEA2025AH Preliminary LINEAR INTEGRATED CIRCUIT STEREO AUDIO AMPLIFIER  DESCRIPTION The UTC TEA2025AH 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  ORDERING INFORMATION O.

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UNISONIC TECHNOLOGIES CO.,LTD. TEA2025AH Preliminary LINEAR INTEGRATED CIRCUIT STEREO AUDIO AMPLIFIER  DESCRIPTION The UTC TEA2025AH 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  ORDERING INFORMATION Order Number Lead Free Halogen Free TEA2025AHL-D16-T TEA2025AHG-D16-T Package DIP-16 DIP-16 Packing Tube  MARKING www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co.,LTD. 1 of 7 QW-R107-070.a TEA2025AH  PIN CONFIGURATION Preliminary LINEAR INTEGRATED CIRCUIT  BLOCK DIAGRAM 9 10 THERMAL PROTECTION 11 50 12 13 10k START CIRCUIT 8 7 DECOUPLING 50 6 5 10k 4 14 15 5k 16 50 1 32 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R107-070.a TEA2025AH Preliminary LINEAR INTEGRATED CIRCUIT  ABSOLUTE MAXIMUM RATINGS (TA = 25°C, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage Peak Output Current VSS IO (peak) 15 1.5 V A Junction Temperature Operating Temperature TJ TOPR 150 -20 ~ +85 C °C Storage Temperature TSTG -40 ~ +150 °C Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. The device is guaranteed to meet performance specification within 0°C ~70°C operating temperature range and assured by design from –20°C ~85°C.  THERMAL CHARACTERISTICS PARAMETER Thermal Resistance Junction to ambient Thermal Resistance Junction to case SYMBOL θJA θJC RATINGS 60 15 UNIT °C/W °C/W  ELECTRICAL CHARACTERISTICS (TA = 25°C, VCC=10V, Stereo, unless otherwise specified.) PARAMETER Supply Voltage Quiescent Current Quiescent Output Voltage Voltage Gain Voltage Gain Difference Input Impedance Output Power RL=4 RL=6 Total Harmonic Distortion Stereo Bridge Supply Voltage Rejection Input Noise Voltage RG=0 RG=10k Cross-Talk SYMBOL VSS IQ VOUT GV GV RIN POUT THD SVR Vn C.T. TEST CONDITIONS Stereo Bridge Stereo per channel THD=10% f=1kHz, VCC=10V THD=1% Bridge, VCC=10V THD=10% THD=1% VCC=10V, RL=4, f=1kHz, POUT=1W VCC=10V, RL=6, POUT=1W RG=0,AV=45Db,VRIPPLE=1 FRIPPLE=100Hz AV=200, Bandwidth:20Hz ~ 20kHz RG=10k, f=1kHz,RL=4, POUT=1W MIN TYP MAX UNIT 3 12 V 40 50 mA 5.0 V 43 45 47 dB 49 51 53 -1 +1 dB 30 k 1.5 W 1W 4.0 W 2W 0.5 1.0 0.5 % 40 46 dB 1.5 3 3 6 μV 40 55 dB UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R107-070.a TEA2025AH Preliminary LINEAR INTEGRATED CIRCUIT  APPLICATION INFORMATION Input Capacitor Input capacitor is PNP type allowing source to be referenced to ground. In this way no input coupling capacitor is required. However, a series capacitor (0.22 uF)to the input side can be useful in case of noise due to variable resistor contact. Bootstrap The bootstrap connection allows to increase the output swing. The suggested value for the bootstrap capacitors (100uF) avoids a reduction of the output signal also at low frequencies and low supply voltages. Voltage Gain Adjust STEREO MODE (Figure 1) The voltage gain is determined by on-chip resistors R1 and R2 together with the external RfC1 series connected between pin 6 (11) and ground. The frequency response is given approximated by: VOUT VIN = Rf + R1 R2 + 1 JWC1 With Rf=0, C1=100μF, the gain results 46 dB with pole at f=32 Hz. THE purpose of Rf is to reduce the gain. It is recommended to not reduce it under 36 dB. 6 (11) Rf C1 R2 R1 2 (15) BRIDGE MODE (Figure 2) Figure 1 The bridge configuration is realized very easily thanks to an internal voltage divider which provides (at pin 1) the CH 1 output signal after reduction. It is enough to connect pin 6 (inverting input of CH 2) with a capacitor to pin 1 and to connect to ground the pin 7. The total gain of the bridge is given by: and with the suggested values (C1 = C2 = 100 uF, Rf = 0) means: Gv = 52 dB with first pole at f = 32 Hz UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R107-070.a TEA2025AH Preliminary  APPLICATION INFORMATION (Cont.) LINEAR INTEGRATED CIRCUIT Figure 2 Output Capacitors The low cut off frequency due to output capacitor depending on the load is given by: with COUT 470uF and RL = 4 ohm it means FL = 80Hz. Pop Noise (Figure 3) Most amplifiers similar to UTC TEA2025AH need external resistors between DC outputs and ground in order to optimize the pop on/off performance and crossover distortion. OUT 800 Figure 3 The UTC TEA2025AH solution allows to save components because of such resistors (800 ohm) are included into the chip. Stability A good layout is recommended in order to avoid oscillations. Generally the designer must pay attention on t.


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