TDA7265 ® 25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY WIDE SUPPLY VOLTAGE RANGE (UP TO ±25V ABS MAX.
TDA7265 ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VS DC Supply Voltage Parameter ±25 V IO Ptot Output Peak Current (internally limited) Power Dissipation Tcase = 70°C 4.
TDA7265 ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = + 20V; RL = 8Ω; RS = 50Ω; GV = 30dB; f = 1KHz; Tamb = 25°C, unless otherwise specified.) Symbol Parameter VS Iq Supply Range VOS Input Offset Voltage Test Condition Min. Total Quiescent Current Ib Non Inverting Input Bias Current PO Music Output Power (*) PO Output Power 80 –20 THD = 10%; RL = 8Ω ; VS = + 22.5V THD = 10% RL = 8Ω ; VS + 16V; RL = 4Ω 20 THD = 1% RL = 8Ω ; VS + 16V; RL = 4Ω THD Total Harmonic Distortion Typ.
TDA7265 Figure 3: Quiescent Current vs. Supply Voltage Figure 4: Frequency Response Figure 5: Output Power vs. Supply Voltage Figure 6: T.H.D. vs. Output Power Figure 7: Output Power vs. Supply Voltage Figure 8: T.H.D. vs.
TDA7265 Figure 9: Quiescent Current vs. Pin # 5 Voltage Figure 10: Attenuation vs. Pin # 5 Voltage Figure 11: SVR vs. Frequency Figure 12: Crosstalk vs. Frequency Figure 13: Power Dissipaton vs. Output Power Figure 14: Power Dissipaton vs.
TDA7265 - when Vpin5 is between +VS - 2.5V and +VS - 6V the final stage current generators are switched on and the amplifier is in mute mode - when Vpin5 is lower than +VS - 6V the amplifier is play mode. MUTE STAND-BY FUNCTION The pin 5 (MUTE/STAND-BY) controls the amplifier status by two different thresholds, referred to +VS. - When Vpin5 higher than = +VS - 2.5V the amplifier is in Stand-by mode and the final stage generators are off Figure 15 +VS (V) 20 t -VS -20 VIN (mV) Vpin5 (V) VS VS-2.
TDA7265 Figure 16: Test and Application Circuit (Stereo Configuration) +VS R2 C3 MUTE/ ST-BY Q1 R1 IN (L) SW1 ST-BY DZ 7 R3 + 4 OUT (L) 8 IN- (L) - GND C5 3 5 C1 R4 C4 +VS R5 R7 RL (L) C8 R6 9 SW2 MUTE 10 R9 IN- (R) R8 C2 IN (R) 11 - 2 OUT (R) + 1 R10 6 -VS C7 RL (R) C9 C6 D94AU087B Figure 17: PC Board and Components Layout of the figure 15 (1:1 scale) 7/11
TDA7265 APPLICATIONS SUGGESTION (Demo Board Schematic) The recommended values of the external compo- nents are those shown are the demo board schematic different values can be used: the following table can help the designer.
TDA7265 BRIDGE APPLICATION Another application suggestion concerns the BRIDGE configuration, where the two power amplifiers are connected as shown by the schematic diagram of figure. 18. This application shows, however, some operative limits due to dissipation and current capability of the output stage. For this reason, we reccomend to use the TDA7265 in bridge with the supply voltage equal/lower than ±16V when the load is 8Ω; with higher loads (i.e.
TDA7265 mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D 0.063 1 0.039 E 0.49 0.55 0.019 0.022 F 0.88 0.95 0.035 0.037 G 1.45 1.7 1.95 0.057 0.067 0.077 G1 16.75 17 17.25 0.659 0.669 0.679 H1 19.6 0.862 0.874 0.886 22.5 0.854 0.87 0.886 18.1 0.685 0.772 H2 20.2 22.5 0.795 L 21.9 22.2 L1 21.7 22.1 L2 17.4 L3 17.25 17.5 17.75 0.679 0.689 0.699 L4 10.3 10.7 10.9 0.406 0.421 0.429 0.713 L7 2.65 2.9 0.
TDA7265 Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specification mentioned in this publication are subject to change without notice.
