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TA1101B Fiches technique(PDF) 6 Page - Tripath Technology Inc. |
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TA1101B Fiches technique(HTML) 6 Page - Tripath Technology Inc. |
6 / 13 page TECHNICAL INFORMATION 6 TA1101B, Rev. 2.2, 08.17.00 External Components Description (Refer to the Application/Test Circuit) Components Description RI Inverting Input Resistance to provide AC gain in conjunction with RF. This input is biased at the BIASCAP voltage (approximately 2.4VDC). RF Feedback resistor to set AC gain in conjunction with RI; ) R / R ( 12 A I F V = . Please refer to the Amplifier Gain paragraph in the Application Information section. CI AC input coupling capacitor which, in conjunction with RI, forms a highpass filter at ) C R 2 ( 1 f I I C π = RREF Bias resistor. Locate close to pin 5 and ground at pin 7. CA BIASCAP decoupling capacitor. Should be located close to pin 14. CD Charge pump input capacitor. This capacitor should be connected directly between pins 1 and 2 and located physically close to the TA1101B. CP Charge pump output capacitor that enables efficient high side gate drive for the internal H- bridges. To maximize performance, this capacitor should be connected directly between pin 29 (CPUMP) and pin 27 (VDDA). Please observe the polarity shown in the Application/ Test Circuit. CS Supply decoupling for the low current power supply pins. For optimum performance, these components should be located close to the pin and returned to their respective ground as shown in the Application/Test Circuit. CSW Supply decoupling for the high current, high frequency H-Bridge supply pins. These components must be located as close to the device as possible to minimize supply overshoot and maximize device reliability. Both the high frequency bypassing (0.1uF) and bulk capacitor (180uF) should have good high frequency performance including low ESR and low ESL. Panasonic HFQ or FC capacitors are ideal for the bulk capacitor. CZ Zobel Capacitor. RZ Zobel resistor, which in conjunction with CZ, terminates the output filter at high frequencies. The combination of RZ and CZ minimizes peaking of the output filter under both no load conditions or with real world loads, including loudspeakers which usually exhibit a rising impedance with frequency. DO Schottky diodes that minimize undershoots of the outputs with respect to power ground during switching transitions. For maximum effectiveness, these diodes must be located close to the output pins and returned to their respective PGND. Please see Application/Test Circuit for ground return pin. LO Output inductor, which in conjunction with CO, demodulates (filters) the switching waveform into an audio signal. Forms a second order filter with a cutoff frequency of ) C L 2 ( 1 f O O C π = and a quality factor of O O O L C L C R Q = . CO Output capacitor. CCM Common Mode Capacitor. |
Numéro de pièce similaire - TA1101B |
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Description similaire - TA1101B |
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