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| UNISONIC TECHNOLOGIES CO., LTD A7240 20W BRIDGE AMPLIFIER FOR CAR RADIO DESCRIPTION The UTC A7240 is a 20W bridge audio amplifier IC and designed for car radio applications. A comprehensive array of on-chip protection, include protection against AC and DC output short circuits (to ground and across the load), load dump transients, and junction over temperature, is feature to provide reliable operation. Furthermore, the UTC A7240 protects the loudspeaker when one output is short-circuited to ground. LINEAR INTEGRATED CIRCUIT 1 TO-220Z7 FEATURES * Few External Components * Output Protected Against short Circuits to Ground and Across Load * Dump Transient * Thermal Shutdown * Loudspeaker Protection * High Current Capability * Low Distortion/Low Noise *Pb-free plating product number: A7240L ORDERING INFORMATION Normal A7240-TB7-T Order Number Lead Free Plating A7240L-TB7-T Package TO-220Z7 Packing Tube A7240L-TB7-T (1)Packing Type (2)Package Type (3)Lead Plating (1) T: Tube (2) TB7: TO-220Z7 (3) Lead Free Plating Blank: Pb/Sn , www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd 1 of 6 QW-R107-048,A A7240 PIN CONFIGURATION LINEAR INTEGRATED CIRCUIT 7 6 5 4 3 2 1 TAB Connected to Pin 4 Output Supply Voltage Output GND Input Sub and Stand-by Feedback UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R107-048,A A7240 ABSOLUTE MAXIMUM RATINGS LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATINGS UNIT Operating Supply Voltage VSS 18 V DC Supply Voltage VSS 28 V Peak Supply Voltage (for 50ms) VSS(PEAK) 40 V Peak Output Current (non repetitive t = 0.1ms) IO(PEAK)(*) 4.5 A Peak Output Current (repetitive f .10Hz) I O(PEAK)(*) 3.5 A Power Dissipation at TC = 85C PD 16 W Storage and Junction Temperature TSTG, TJ -40~+150 C Note 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. (*) Internally limited THERMAL DATA PARAMETER Thermal Resistance Junction-case PARAMETER Supply Voltage Output Offset Voltage Total Quiescent Current Output Power Distortion Voltage Gain Supply Voltage Rejection Total Input Noise Efficiency Input Resistance Input Sensitivity Frequency Roll Off (-3dB) Stand-by Threshold Stand-by Current Stand-by Attenuation Low High SYMBOL VSS VO(OFF) IQ POUT THD GV SVR eN RIN VIN fL fH RL =4 f = 1kHz, d= 10% f = 1kHz, POUT = 50MW ~ 12W f = 1KHz f = 100Hz, Rg = 10K Rg = 10K RL =4, f = 1KHz f = 1kHz f = 1kHz, POUT = 2W, RL =4 POUT = 15W, RL =4 88 25 200 90 70 28 129 1 70 B= Curve A B = 22Hz~22KHz RL =4 RL =8 RL =4 RL =8 18 10 SYMBOL JC TEST CONDITIONS RATINGS 4 MIN UNIT V TYP MAX UNIT 18 V 150 mV 65 20 12 0.1 0.05 40 40 2 3 65 120 mA W 0.5 0.5 40.5 % dB dB 10 V % k mV Hz kHz V A dB ELECTRICAL CHARACTERISTICS(Ta = 25C, RTH (heatsink)= 4C/W, VSS = 14.4V) 39.5 35 VTHD (PIN2) ISTN-BY ASTN-BY VOUT = 2Vrms UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R107-048,A A7240 TEST AND APPLICATION CIRCUIT +VSS C4 220 F C5 0.1 F 6 LINEAR INTEGRATED CIRCUIT C7 0.22 F R2 2.2 7 OUT 5 R1 2.2 C6 0.22 F INPUT C1 1F 3 UTC A7240 2 C2 22 F 1 C3 22 F 4 STANDBY COMPONENT USAGE SUGGESTION Component R1, R2 C1 C2 C3 C4 C5 C6, C7 Suggest 2.2W F 22 F 22 F 220 F 0.1 F 0.22 F Purpose Frequency Stability Larger than Danger of High Frequency Oscillation Smaller than Input DC Decoupling Higher Turn On and Stand-by Delay Ripple Rejection Feedback low Frequency Cutoff Supply Filter Supply Bypass Frequency Stability Increase of SVR Increase of the Turn On Delay Higher Turn On Pop. Higher Low Frequency Cutoff Degradation of SVR Higher Low Frequency Cutoff Danger of Oscillation Danger of Oscillation Danger of Oscillation UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R107-048,A A7240 TYPICAL CHARACTERISTICS OutputPower vs. Supply Voltage LINEAR INTEGRATED CIRCUIT Distortion vs. Output Power 22 VSS = 10% RL = 4 f = 1KHz THD (%) 8 VSS = 14.4V RL = 4 f = 1KHz PD (W) 18 6 14 4 10 2 6 9 10 11 12 13 VS (V) 14 15 0 2 5 10 PD (W) 14 OutputPower vs. Supply Voltage THD = 10% RL = 8 f = 1KHz Distortion vs. Output Power VSS = 14.4V RL = 8 f = 1KHz 14 12 14 12 THD (%) 9 10 11 12 13 14 15 16 PD (W) 10 8 6 4 VSS (V) 10 8 6 4 0 2 4 6 8 PD (W) 10 12 SupplyVoltage Rejection vs Frequency . VSS = 14.4V VR = 0.5V Rg = 10K 60 THD (%) 50 10 40 C2 = 22 F C2 = 10 F 30 20 102 103 f (Hz) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R107-048,A A7240 LINEAR INTEGRATED CIRCUIT 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R107-048,A |
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