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TDA7267A Scheda tecnica(PDF) 3 Page - STMicroelectronics |
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TDA7267A Scheda tecnica(HTML) 3 Page - STMicroelectronics |
3 / 7 page APPLICATION HINTS: For 14.5V supply and 8 Ω speaker application, its maximum power dissipation is about 1.8W. Assumming that max ambient temperature is 70 °C, the required thermal resistance of the de- vice mounted on the PCB with a dissipating area must be equal to: (150 - 70)/1.8 = 44.4 °C/W. Junction to pin thermal resistance of the package is about 15 °C/W. That means external heat sink of about 30 °C/W is required. Cu ground plane of PCB can be used as heat dis- sipating means. IN SVR P-GND VS C4 100 µF VS=14.5V C5 470 µF OUT 8 Ω C1 0.1 µF C3 47 µF IN D98AU828 STAND-BY 4 3 9 to 16 2 1 S-GND 6 Figure 1. Application Circuit THERMAL DATA Symbol Parameter Value Unit Rth j-amb Thermal Resistance Junction to ambient 70 °C/W Rth j-case Thermal Resistance Junction to case 15 °C/W ELECTRICAL CHARACTERISTICS (Tamb = 25 °C; VS = 14.5V; RL = 8Ω; f = 1KHz; unless otherwise specified.) Symbol Parameter Test Condition Min. Typ. Max. Unit VS Supply Voltage Range 5 18 V IS Quiescent Current 23 35 mA Isb Stand-By Current Pin 3 shorted to GND 0.3 mA VO Quiescent Output Voltage 7.5 V AV Voltage Gain 31 33 dB RIN Input Impedance 50 100 K Ω PO Output Power THD = 10% 2.7 3 W THD Distortion PO = 1W 0.1 0.3 % SVR Supply Voltage Rejection Vripple = 150mVrms; Fripple = 1KHz 50 dB EI Input Noise Voltage Rg = 10K Ω; BW = 20Hz to 20KHz 5 10 µV Vsb Stand-By Enable Voltage 1 V TDA7267A 3/7 |
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