A7240-TB7-T

A7240 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD A7240 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 6 Copyright © 2005 Unisonic Technologies Co., Ltd QW-R107-048,A 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 junc tion over temperature, is feature to provide reliable o peration. Furthermore, the UTC A7240 protects the loudspeaker when one output is short-circuited to ground. „ 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 TO-220Z7 *Pb-free plating product number: A7240L „ ORDERING INFORMATION Order Number Normal Lead Free Plating Package Packing A7240-TB7-T A7240L-TB7-T TO-220Z7 Tube A7240 L-TB7-T (1)Packing Type (3)Lead Plating (2)Package Type (1) T: Tube (2) TB7: TO-220Z7 (3) Lead Free Plating , Blank: Pb/Sn

A7240 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 6 www.unisonic.com.tw QW-R107-048,A „ PIN CONFIGURATION TAB Connected to Pin 4

7 Output

A7240 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 6 www.unisonic.com.tw QW-R107-048,A „ ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Operating Supply Voltage V SS 18 V DC Supply Voltage V SS 28 V Peak Supply Voltage (for 50ms) V SS(PEAK) 40 V Peak Output Current (non repetitive t = 0.1ms) I O(PEAK)(*) 4.5 A Peak Output Current (repetitive f .10Hz) I O(PEAK)(*) 3.5 A Power Dissipation at TC = 85°C P D 16 W Storage and Junction Temperature T STG, 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 SYMBOL RATINGS UNIT Thermal Resistance Junction-case θJC 4 V „ ELECTRICAL CHARACTERISTICS(Ta = 25°C, RTH (heatsink)= 4°C/W, VSS = 14.4V) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Supply Voltage V SS 18 V Output Offset Voltage V O(OFF) 150 mV Total Quiescent Current I Q R L =4Ω 65 120 mA RL =4Ω 18 20 Output Power P OUT f = 1kHz, d= 10% RL =8Ω 10 12 W RL =4Ω 0.1 0.5Distortion THD f = 1kHz, P OUT = 50MW ~ 12W RL =8Ω 0.05 0.5 % Voltage Gain G V f = 1KHz 39.5 40 40.5 dB Supply Voltage Rejection SVR f = 100Hz, Rg = 10K Ω 35 40 dB B= Curve A 2 Total Input Noise eN Rg = 10K Ω B = 22Hz~22KHz 3 10 µV Efficiency η R L =4Ω, f = 1KHz 65 % Input Resistance R IN f = 1kHz 70 kΩ Input Sensitivity V IN f = 1kHz, P OUT = 2W, RL =4Ω 28 mV Low f L 88 129 HzFrequency Roll Off (-3dB) High f H POUT = 15W, RL =4Ω 25 kHz Stand-by Threshold V THD (PIN2) 1 V Stand-by Current I STN-BY 200 µA Stand-by Attenuation A STN-BY V OUT = 2Vrms 70 90 dB

A7240 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 6 www.unisonic.com.tw QW-R107-048,A „ TEST AND APPLICATION CIRCUIT 0.22DŽF 2.2Ƹ 0.1DŽF UTC A7240 220DŽF 1DŽF 22DŽF 22DŽF C6 0.22DŽF 2.2Ƹ OUT INPUT +VSS STANDBY COMPONENT USAGE SUGGESTION Component Suggest Purpose Larger than Smaller than R1, R2 2.2W Frequency Stability Danger of High Frequency Oscillation C1 DŽF Input DC Decoupling Higher Turn On and Stand-by Delay Higher Turn On Pop. Higher Low Frequency Cutoff C2 22DŽF Ripple Rejection Increase of SVR Increase of the Turn On Delay Degradation of SVR C3 22DŽF Feedback low Frequency Cutoff Higher Low Frequency Cutoff C4 220DŽF Supply Filter Danger of Oscillation C5 0.1DŽF Supply Bypass Danger of Oscillation C6, C7 0.22DŽF Frequency Stability Danger of Oscillation

A7240 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 6 www.unisonic.com.tw QW-R107-048,A „ TYPICAL CHARACTERISTICS 91 01 11 21 31 41 5 VS (V) PD (W) OutputPower vs. Supply Voltage 2 5 10 14 PD (W) THD (%) Distortion vs. Output Power VSS = 10% RL = 4Ƹ f = 1KHz VSS = 14.4V RL = 4Ƹ f = 1KHz 91 01 11 21 31 41 51 6 VSS (V) THD = 10% RL = 8Ƹ f = 1KHz PD (W) OutputPower vs. Supply Voltage 02 4 6 81 0 1 2 PD (W) THD (%) Distortion vs. Output Power VSS = 14.4V RL = 8Ƹ f = 1KHz 102 103 f (Hz) THD (%) SupplyVoltage Rejection vs. Frequency VSS = 14.4V VR = 0.5V Rg = 10KƸ C2 = 22DŽF C2 = 10DŽF

A7240 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 of 6 www.unisonic.com.tw QW-R107-048,A 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.