circuito integrado de audio tda7294

Nuevo circuito integrado de audio tda7294

100 V, 100 W DMOS audio amplifier with mute/st-by TDA7294 Datasheet DS0013 - Rev 8 - July 2020 For further information contact your local STMicroelectronics sales office. www.st.com 1 Typical application Figure 1. Typical application and test circuit IN- 2 R2 680Ω C2 22µF C1 470nF IN+ R1 22K R6 2.7Ω C10 100nF 3 R3 22K - + MUTE STBY 4 VM VSTBY 10 9 IN+MUTE MUTE STBY R4 22K THERMAL SHUTDOWN S/C PROTECTION R5 10K C3 10µF C4 10µF 1 STBY-GND C5 22µF 7 13 14 6 8 15 -Vs -PWVs BOOTSTRAP OUT +Vs +PWVs C9 100nF C8 1000µF -Vs C7 100nF +Vs C6 1000µF Note: The Boucherot cell R6, C10, normally not necessary for a stable operation it could be needed in presence of particular load impedances at VS < ± 25 V. TDA7294 Typical application DS0013 - Rev 8 page 2/31 2 Pin connection Figure 2. Pin connection (top view) TAB connected to -VS TDA7294 Pin connection DS0013 - Rev 8 page 3/31 3 Block diagram Figure 3. Block diagram TDA7294 Block diagram DS0013 - Rev 8 page 4/31 4 Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Value Unit VS Supply voltage (no signal) ± 50 V IO Output peak current 10 A Ptot Total power dissipation (Tcase= 70 °C) 50 W Top Operating ambient temperature range 0 to 70 °C Tstg Storage temperature 150 °C Tj Junction temperature Table 2. Thermal data Symbol Parameter Value Unit Rth-jcase Thermal resistance junction-case 1.5 °C/W TDA7294 Maximum ratings DS0013 - Rev 8 page 5/31 5 Electrical characteristics Refer to the test circuit VS = ± 35 V, RL = 8 Ω, GV = 30 dB; Rg = 50 Ω; Tamb = 25 °C, f = 1 kHz; unless otherwise specified. Table 3. Electrical characteristics Symbol Parameter Test condition Min. Typ. Max. Unit VS Supply range 10 40 V Iq Quiescent current 20 30 65 mA Ib Input bias current 500 nA VOS Input offset voltage ±10 mV IOS Input offset current ±100 nA PO RMS continuous output power d = 0.5%: VS = ± 35 V, RL = 8 Ω VS= ± 31 V, RL = 6 Ω VS = ± 27 V, RL = 4 Ω 60 60 60 70 70 70 W W W Music Power (RMS) IEC268.3 RULES - ∆t = 1 s (1) d = 10% RL = 8 Ω; VS = ± 38 V RL = 6 ; VS = ± 33 V RL = 4 Ω; VS = ± 29 V (2) 100 100 100 W W W d Total harmonic distortion (3) PO = 5 W; f = 1 kHz PO = 0.1 to 50 W; f = 20 Hz to 20 kHz 0.005 0.1 % % VS = ± 27 V, RL = 4 Ω PO = 5 W; f = 1 kHz PO = 0.1 to 50 W; f = 20 Hz to 20 kHz 0.01 0.1 % % SR Slew rate 7 10 V/μs GV Open loop voltage gain 80 dB Closed loop voltage gain 24 30 40 dB eN Total input noise A = curve f = 20 Hz to 20 kHz 1 2 5 μV fL, fH Frequency response (-3 dB) PO = 1 W 20 Hz to 20 kHz Ri Input resistance 100 kΩ SVR Supply voltage rejection f = 100 Hz; Vripple = 0.5 Vrms 60 75 dB TS Thermal shutdown 145 °C Stand-by function (Ref: -VS or GND) VST on Stand-by on threshold 1.5 V VST off Stand-by off threshold 3.5 V ATTst-by Stand-by attenuation 70 90 dB Iq st-by Quiescent current @ Stand-by 1 3 mA Mute function (Ref: -VS or GND) TDA7294 Electrical characteristics DS0013 - Rev 8 page 6/31 Symbol Parameter Test condition Min. Typ. Max. Unit VMon Mute on threshold 1.5 V VMoff Mute off threshold 3.5 V ATTmute Mute attenuation 60 80 dB 1. MUSIC POWER CONCEPT - MUSIC POWER is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1 kHz. 2. Limited by the max. allowable current. 3. Tested with optimized application board (see Figure 4).