TDA7250 60 W HI-FI DUAL AUDIO DRIVER . .. . .. . WIDE SUPPLY VOLTAGE RANGE : 20 TO 90 V (± 10 to ± 45 V) VERY LOW DISTORTION AUTOMATIC QUIESCENT CURRENT CONTROL FOR THE POWER TRANSISTORS WITHOUT TEMPERATURE SENSE ELEMENTS OVERLOAD CURRENT PROTECTION FOR THE POWER TRANSISTORS MUTE/STAND-BY FUNCTIONS LOW POWER CONSUMPTION OUTPUT POWER 60 W/8 Ω AND 100 W/4 Ω DIP20 ORDERING NUMBER : TDA7250 DESCRIPTION The TDA7250 stereo audio driver is designed to drive two pair of complementary output transistor in the Hi-Fi power amplifiers. APPLICATION CIRCUIT March 1995 1/11 TDA7250 PIN CONNECTION (top view) ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vs Supply Voltage 100 V Ptot Power Dissipation at Tamb = 60 °C 1.4 W Tj, Tstg Storage and Junction Temperature – 40 to + 150 °C THERMAL DATA Symbol Rth j-amb 2/11 Parameter Thermal Resistance Junction-ambient Max. Value Unit 65 °C/W TDA7250 PIN FUNCTIONS N° Name Function 1 VS – POWER SUPPLY Negative Supply Voltage. 2 NON–INV. INP. CH. 1 Channel 1 Input Signal. 3 QUIESC. CURRENT CONTR. CAP. CH1 This capacitor works as an integrator, to control the quiescent current to output devices in no-signal conditions on channel 1. 4 SENSE (–) CH. 1 Negative voltage sense input for overload protection and for automatic quiescent current control. 5 ST. BY / MUTE / PLAY Three-functions Terminal. For VIN = 1 to 3 V, the device is in MUTE and only quiescent current flows in the power stages ; - for VIN < 1 V, the device is in STAND-BY mode and no quiescent current is present in the power stages ; - for VIN > 3 V, the devic 6 CURRENT PROGRAM High Impedance Power-stages Monitor. 7 SENSE (–) CH. 2 Negative Voltage Sense Input for Overload Protection and for Automatic Quiescent Current Control. 8 QUIESC. CURRENT CONTR. CAP. CH. 2 This capacitor works as an integrator, to control the quiescent current to output devices in no-signal conditions on channel 2. If the voltage at its terminals drops under 250 mV, it also resets the device from high-impedance state of output stages. 9 NON–INV. INP. CH. 2 Channel 2 Input Signals. Negative Supply Voltage. 10 Vs – POWER SUPPLY 11 INVERT. INP. CH. 2 Feedback from Output (channel 2). 12 OUT (–) CH. 2 Out Signal to Lower Driver Transistor of Channel 2. 13 OUT (+) CH. 2 Out Signal to Higher Driver Transistor of Channel 2. 14 SENSE (+) CH. 2 Positive Voltage Sense Input for Overload Protection and for Automatic Quiescent Current Control. 15 COMMON AC GROUND AC Input Ground in MUTE Condition. 16 VS + POWER SUPPLY Positive Supply Voltage. 17 SENSE (+) CH. 1 Positive Voltage Sense Input for Overload Protection and for Automatic Quiescent Current Control. 18 OUT (+) CH. 1 Out Signal to High Driver Transistor of Channel 1. 19 OUT (–) CH. 1 Out Signal to Low Driver Transistor of Channel 1. 20 INVERT. INP. CH. 1 Feedback from Output (channel 1). 3/11 TDA7250 BLOCK DIAGRAM 4/11 TDA7250 ELECTRICAL CHARACTERISTICS (Tamb = 25 °C, Vs = ± 35 V, play mode, unless otherwise specified) Symbol Parameter Vs Supply Voltage Quiescent Drain Current Id Test Conditions Min. ± 10 Stand-by Mode Play Mode Ib Vos Ios Gv Input Bias Current Input Offset Voltage Input Offset Current Open Loop Voltage Gain eN Input Noise Voltage SR d Slew Rate Total Harmonic Distortion Vopp Po Output Voltage Swing Output Power (*) Io SVR Cs Output Current Supply Voltage Rejection Channel Separation Typ. 8 10 0.2 1 100 90 60 3 f = 100 Hz f = 10 kHz RG = 600 Ω B = 20 Hz to 20 kHz Gv = 26 dB, Po = 40 W f = 1 kHz f = 20 kHz Vs = ± 35 V, R L = 8 Ω Vs = ± 30 V, R L = 8 Ω Vs = ± 35 V, R L = 4 Ω f = 100 Hz f = 1 kHz Max. ± 45 14 1 ± 10 200 Unit V mA µA mV nA dB µV 10 V/µs 0.004 0.03 60 60 40 100 ±5 75 75 % % Vpp W W W mA dB dB MUTE / STANDBY/ PLAY FUNCTIONS Symbol Ii Parameter Test Conditions Min. Input Current (pin 5) Max. Comparator Standby Threshold (**) / H Hysteresis Standby / Mute Vth Comparator Mute / Play Threshold (**) H Hysteresis Mute / Play Vi Input Voltage Max. (pin 5) Mute 1.0 1.5 200 2.4 Mute Attenuation 1.25 f = 1 kHz 3.0 d = 0.1 % ; V mV 3.6 V 300 mV 60 dB 12 (**) f = 1 KHz ; Unit µA 0.1 Vth (*) Appli cation circuit of fig. 1 (**) Referred to − Vs . Typ. V G v =26 dB. CURRENT SURVEY CIRCUITRY Symbol Parameter Comparator Reference td Test Conditions to + VS to – VS Delay Time Min. Typ. Max. Unit 0.8 0.8 1 1 1.4 1.4 V V µs 10 QUIESCENT CURRENT CONTROL Symbol Min. Typ. Capacitor Current Parameter Charge Discharge Test Conditions 30 250 60 500 Comparator Reference to + VS to – VS 10 20 10 Max. Unit µA µA 25 mV mV 5/11 TDA7250 Figure 1 : Application Circuit with Power Darlingtons. Note : Q1/Q2 = Q3/Q4 = TIP 142/TIP147 GV = 1 + R1/R2 6/11 TDA7250 Figure 2 : Output Power vs. Supply Voltage. Figure 3 : Distortion vs.Output Power (*). Figure 4 : Channel Separation. Figure 5 : Supply Voltage Rejection vs. Frequency. Figure 6 : Quiescent Current vs. Supply Voltage. Figure 7 : Quiescent Current vs. Tamb. 7/11 TDA7250 Figure 8 : Total Dissipated Power vs. Output Powe r (*). Figure 10 : Play-mute Standby Operation. (*) Complete circuit 8/11 Figure 9 : Efficiency vs. Output Power (*). TDA7250 Figure 11 : Application Circuit Using Power Transistors. Figure 12 : Suggested Transistor Types for Various Loads and Powers. RL = 8 Ω TL = 4 Ω 15W +30W +50W +70W 30W +50W +90W +130W BDX 53/54A BDX 53/54B BDW 93/94B TIP 142/147 BDW 93/94A BDW 93/94B BDV 64/65B MJ 11013/11014 9/11 TDA7250 DIP20 PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.85 b b1 TYP. MAX. MIN. TYP. MAX. 0.020 1.40 0.033 0.50 0.38 0.055 0.020 0.50 D 0.015 0.020 24.80 0.976 E 8.80 0.346 e 2.54 0.100 e3 22.86 0.900 F 7.10 0.280 I 5.10 0.201 L Z 10/11 inch 3.30 0.130 1.27 0.050 TDA7250 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1995 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 11/11