UNISONIC TECHNOLOGIES CO., LTD TDA2050 LINEAR INTEGRATED CIRCUIT 32W HI-FI AUDIO POWER AMPLIFIER DESCRIPTION The UTC TDA2050 is a monolithic integrated circuit with high power capability and is designed to use as an class AB audio amplifier. It can deliver typically 50W music power into 4Ω load over 1 sec at VS=22.5V, f = 1KHz. The device is most suitable for both Hi-Fi and high class TV sets on the strength of its high supply voltage and very low harmonic and crossover distortion. 1 TO-220B FEATURES * High output power (50W Music Power IEC 268.3 Rules) * High operating supply voltage (50V) * Single or split supply operations * Very low distortion * Short circuit protection (OUT to GND) * Thermal shutdown *Pb-free plating product number: TDA2050L ORDERING INFORMATION Ordering Number Normal Lead Free Plating TDA2050-TB5-T TDA2050L-TB5-T Package Packing TO-220B Tube PIN CONFIGURATION 5 +VS 4 OUTPUT 3 -VS 2 INVERTING INPUT 1 NON INVERTING INPUT *TAB CONNECTED TO PIN 3 drew lee 13537087568 1 QW-R107-036,A TDA2050 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 5 SHORT CIRC. PROTECT. 4 VREF SHORT CIRC. PROTECT. 3 1 UNISONIC TECHNOLOGIES CO., LTD drew lee 13537087568 2 2 QW-R107-036,A TDA2050 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage Differential Input Voltage Output Peak Current (internally limited) Power Dissipation TC= 75℃ SYMBOL RATINGS UNIT VS ±25 V VIN VS ℃ VIN(DIFF) ±15 ℃ IOUT 5 PD 25 W ℃ Junction Temperature TJ +125 ℃ Storage Temperature TSTG -40 ~ +150 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℃~70℃ operating temperature range and assured by design from –40℃~85℃. THERMAL DATA PARAMETER Thermal Resistance junction-case SYMBOL θJC RATINGS 3 UNIT ℃/W ELECTRICAL CHARACTERISTICS (Refer to the Test Circuit, VS = ±18V, Ta = 25℃, f = 1 kHz, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS Supply Voltage VS VS = ±4.5V Quiescent Drain Current ID VS = ±25V Input Bias Current IB VS = ±22V Input Offset Voltage VIN(OS) VS = ±22V Input Offset Current IIN(OS) VS = ±22V RL = 4Ω RL = 8Ω D = 0.5% RL = 8Ω, VS = ±22V RMS Output Power PO RL = 4Ω RL = 8Ω D = 10% RL = 8Ω, VS = ±22V Music Power IEC268.3 RULES D = 10%, T = 1s, VS = ±22.5V, RL = 4Ω RL = 4Ω f = 1kHz, PO = 0.1 ~ 24W f = 100Hz ~ 10kHz, PO = 0.1 ~ 18W Total Harmonic Distortion THD RL = 8Ω, VS = ±22V f = 1kHz, PO = 0.1 ~ 20W f = 100Hz ~ 10kHz, PO = 0.1 ~ 15W Slew Rate SR Open Loop Voltage Gain GV Closed Loop Voltage Gain GV Power Bandwidth (-3dB) BW RL = 4Ω, VIN= 200mV Curve A Total Input Noise eN B = 22Hz ~ 22kHz Input Resistance (pin 1) RIN Supply Voltage Rejection SVR RS = 22KΩ, f =100Hz, VRIPPLE =0.5Vrms PO = 28W, RL = 4Ω Efficiency η PO = 25W, RL = 8Ω, VS = ±22V UNISONIC TECHNOLOGIES CO., LTD drew lee 13537087568 MIN ±4.5 TYP 18 21 0.4 24 22 MAX ±25 50 90 0.5 ±15 ±200 27 18 25 35 22 32 50 0.03 UNIT V mA µA mV nA W 0.5 0.5 % 0.02 0.5 8 80 30 30.5 31 20 ~ 80000 4 5 10 500 45 65 67 5 V/µs dB dB Hz µV kΩ dB % 3 QW-R107-036,A TDA2050 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT FOR SPLIT SUPPLY APPLICATION SUGGESTIONS +VS C5 220μF C1 22μF 1 VIN R1 22kΩ 2 C3 100nF 5 + 4 UTC TDA2050 - R3 22kΩ 3 R4 2.2Ω RL C7 0.47μF R2 680Ω -VS C4 100nF C2 22μF C6 220μF Figure.1 Split Supply Typical Application Circuit The following table demonstrates the recommended values of the external components are those shown on above circuit. Different values can be used. COMPONENT PURPOSE TYPICAL R1 Input Impedance 22kΩ R2 R3 R4 C1 Feedback Resistor 680Ω 22kΩ 2.2Ω 1µF Frequency Stability Input Decoupling DC Inverting Input DC C2 Decoupling C3, C4 Supply Voltage Bypass C5, C6 Supply Voltage Bypass C7 Frequency Stability * The gain must be higher than 24dB 22µF 100nF 220µF 0.47µF UNISONIC TECHNOLOGIES CO., LTD drew lee 13537087568 RECOMMENDED VALUE LARGER SMALLER Increase of Input Impedance Decrease of Input Impedance Decrease of Gain* Increase of Gain Increase of Gain Decrease of Gain* Danger of Oscillations Higher Low-frequency cut-off Increase of Switch ON/OFF Higher Low-frequency cut-off Noise Danger of Oscillations Danger of Oscillations Danger of Oscillations 4 QW-R107-036,A TDA2050 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT(CONT.) FOR SINGLE SUPPLY APPLICATION SUGGESTIONS +VS R1 22kΩ C1 2.2μF C3 1000μF C5 100nF 5 1 IN R3 22kΩ 2 + UTC TDA2050 - 3 4 R5 22kΩ R2 22kΩ R6 2.2Ω RL C6 0.47μF C4 22μF C2 1000μF C7 1000μF R4 680Ω Figure.2 Single Supply Typical Application Circuit The following table demonstrates the recommended values of the external components are those shown on above circuit. Different values can be used. COMPONENT R1, R2, R3 R4 R5 R6 C1 C2 C3 PURPOSE Biasing Resistor Feedback Resistor Frequency Stability Input Decoupling DC Supply Voltage Rejection Supply Voltage Bypass Inverting Input DC Decoupling C5 Supply Voltage Bypass C6 Frequency Stability C7 Output DC Decoupling * The gain must be higher than 24dB C4 TYPICAL RECOMMENDED VALUE LARGER 22kΩ 22kΩ 680Ω 2.2Ω 2.2µF Increase of Gain Decrease of Gain* Danger of Oscillations 100µF Worse Turn-off Transient Worse Turn-on Delay 100nF 0.47µF 1000µF Decrease of Gain* Increase of Gain Higher Low-frequency cut-off Danger of Oscillations Worse of Turn-off Transient 1000µF 22µF SMALLER Increase of Switch ON/OFF Higher Low-frequency cut-off Danger of Oscillations Danger of Oscillations Higher Low-frequency cut-off NOTE: If the supply voltage is lower than 40V and the load is 8Ω(or more), a lower value of C2(i.e. 22µF) can be used. C7 can be larger than 1000µF only if the supply voltage does not exceed 40V. UNISONIC TECHNOLOGIES CO., LTD drew lee 13537087568 5 QW-R107-036,A TDA2050 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS (Split Supply Test Circuit, unless otherwise specified) Output Power vs. Supply Voltage 40 Output Power vs. Supply Voltage 40 RL = 8Ω f = 1kHz 35 30 30 THD = 10% 25 PO (W) PO (W) 25 + 20 15 THD = 0.5% 15 10 5 5 0 5 10 15 20 VS (V) 25 THD= 10% 20 10 0 RL = 4Ω f = 1kHz 35 0 30 THD= 0.5% 0 15 20 VS (V) 25 30 40 60 RL = 4Ω 55 30 45 25 PD (W) 50 40 15 30 10 25 5 5 10 15 20 VS (V) 25 0 30 80 70 60 50 m 20 35 0 VS = 18V RL = 4Ω f = 1kHz 35 PD 0 5 10 15 20 25 PO (W) 30 35 40 40 30 20 10 0 Total Power Dissipation and Efficiency vs. Output Power VS = 22V RL = 8Ω f = 1kHz 28 24 80 70 60 50 m 16 PD 12 8 4 0 0 5 10 15 20 25 PO (W) 30 35 m (%) PD (W) 20 40 30 20 10 0 UNISONIC TECHNOLOGIES CO., LTD drew lee 13537087568 6 QW-R107-036,A m (%) I D (mA) 10 Total Power Dissipation and Efficiency vs. Output Power Quiescent Current vs. Supply Voltage 20 5