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TS4990 データシート(PDF) 4 Page - STMicroelectronics |
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TS4990 データシート(HTML) 4 Page - STMicroelectronics |
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4 / 32 page  Typical application schematics TS4990 4/32 2 Typical application schematics Figure 1. Typical application schematics Table 3. Component descriptions Component Functional description Rin Inverting input resistor that sets the closed loop gain in conjunction with Rfeed. This resistor also forms a high pass filter with Cin (Fc = 1 / (2 x Pi x Rin x Cin)). Cin Input coupling capacitor that blocks the DC voltage at the amplifier input terminal. Rfeed Feed back resistor that sets the closed loop gain in conjunction with Rin. Cs Supply bypass capacitor that provides power supply filtering. Cb Bypass pin capacitor that provides half supply filtering. Cfeed Low pass filter capacitor allowing to cut the high frequency (low pass filter cut-off frequency 1/ (2 x Pi x Rfeed x Cfeed)). AV Closed loop gain in BTL configuration = 2 x (Rfeed / Rin). Exposed pad DFN8 exposed pad is electrically connected to pin 7. See DFN8 package information on page 28 for more information. Rfeed Rin Audio In Cfeed Vcc Cin Cs Cb Standby Control Speaker 8Ohms Bias AV = -1 Vin- Vin+ Bypass Standby Vout 1 Vout 2 + - + - TS4990 |
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