TA0104A Tripath Technology Inc., TA0104A Datasheet
TA0104A
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TA0104A Summary of contents
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... TA0104A STEREO 500W (4:) CLASS-T DIGITAL AUDIO AMPLIFIER DRIVER USING DIGITAL POWER PROCESSING (DPP TECHNOLOGY ’ ...
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Absolute Maximum Ratings SYMBOL PARAMETER Vs Supply Voltage (Vspos & Vsneg) V5 Positive 5 V Bias Supply VN12 Reference Voltage: Nominal +12V referenced to Vsneg T Storage Temperature Range STORE T Operating Free-air Temperature Range A Notes: Absolute Maximum Ratings ...
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Performance Characteristics – Single Ended +90V Unless otherwise specified 1kHz, Measurement Bandwidth = 22kHz. T See Notes 1 & 2 for Operating Conditions and Test/Application Circuit Setup. SYMBOL PARAMETER P Output Pow er OUT (Continuous Average/Channel) ...
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Pin Description Pin Function 1 AGND 2 OVERLOADB MUTE 5, 6 IN2, IN1 7, 8 BBM0, BBM1 9, 12 GNDKELVIN1, GNDKELVIN2 10, 11 OCR2, OCR1 13, 14 OCS1L+, OCS1L- 15, 16 OCS1H-, OCS1H+ 17, 30 LO1COM, LO2COM ...
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... 0 Not Connected (Must Be Left Floating) Note - Heavy Lines Indicate High-Current Paths TA0104A 18 FDBKN1 16 OCS1H+ 15 OCS1H- 22 HO1 Processing HO1COM ...
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Typical Performance +75V THD+N vs Output Power 10 20Hz - 22kHz 1kHz BBM = 25nS V = +/-75V STW38NB20 MOSFET 1 0.5 0.2 0.1 0.05 0.02 0.01 ...
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... IN IN1 BBM0 8 BBM1 OCR1 11 R OCR1 3 V5 Figure 1. Simplified TA0104A Amplifier TA0104A 18 FDBKN1 16 OCS1H+ Over-current Detection 15 OCS1H- V BOOT 22 HO1 ...
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... TA0104A Amplifier Operation Figure simplified diagram of one channel (Channel TA0104A amplifier to assist in understanding its operation. The audio input signal (IN1) is fed to the processor internal to the TA0104A, where a modulation pattern is generated. This pattern is spread spectrum and varies between approximately 200kHz and 1 ...
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... Tripath recommends that any offsets during operation be nulled out of the amplifier with a circuit like the one shown connected to IN1 and IN2 in the Test/Application Circuit. It should be noted that the DC voltage on the output of a TA0104A amplifier with no load in mute mode is approximately 2.5V. This offset does not need to be nulled. The output impedance of the amplifier in mute mode is approximately 10 KOhms ...
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... Note that the two channels of a TA0104A amplifier can be used to provide a single, bridged amplifier of almost four times the output power of one of the single-ended amplifier channels. To configure a bridged amplifier, the input to one TA0104A channel must be the inverted signal of the input to the other channel. ...
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... VN12 Supply VN12 is an additional supply voltage required by the TA0104A. VN12 must be 12 volts more positive than the nominal V . VN12 must track V SNEG design of the supply for VN12 must behave accordingly. Generating the VN12 supply requires some care. The proper way to generate the voltage for VN12 is to use a 12V-supply voltage referenced to the V supply rather than to ground (PGND) ...
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... OCR for Output Transistor Selection The key parameters to consider when selecting a MOSFET to use with the TA0104A are drain-source breakdown voltage (BVdss), gate charge (Qg), and on-resistance (R The BVdss rating of the MOSFET needs to be selected to accommodate the voltage swing between V and V as well as any voltage peaks caused by voltage ringing due to switching transients. ...
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... They should be physically located as close to the MOSFET leads as possible. Turn-on & Turn-off Noise If turn-on or turn-off noise is present in a TA0104A amplifier, the cause is frequently due to other circuitry external to the TA0104A. While the TA0104A has circuitry to suppress turn-on and turn-off transients, the combination of the power supply and other audio circuitry with the TA0104A in a particular application may exhibit audible transients ...
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... TA0104A. Circuit Board Layout Considerable care needs to be taken in the layout of the circuit board for a TA0104A amplifier. The high currents flowing through PCB traces and the inductive effects due to the switching frequencies involved can cause large overshoot and undershoot voltages if care is not taken. A general rule to follow is to keep the PCB trace of each signal path to/from each lead of each output MOSFET as short as physically possible ...
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... THD+N, are significantly affected by the design of the low-pass filter used on the output of the TA0104A and also the bandwidth setting of the measurement instrument used. Unless the filter has a very sharp roll-off just past the audio band or the bandwidth of the measurement instrument ends there, some of the inaudible noise components introduced by the Tripath amplifier switching pattern will get integrated into the measurement, degrading it ...
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... Efficiency Of A TA0104A Amplifier The efficiency amplifier is OUT IN The power dissipation of a TA0104A amplifier is primarily determined by the on resistance, R the output transistors used, and the switching losses of these transistors, P amplifier, P (per channel) is approximated by DRIVER SW OUT where Power dissipated in the TA0104A = 1 ...
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180mil. (4.6mm) 750mil. (19mm) 180mil. (4.6mm) 485mil. (12.3mm 100mil. 3 (2.54mm) 2030mil. (51.6mm) 4 MAX 2087mil. (53mm) 5 1670mil. (42.4mm) ...
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... Tripath and Digital Power Processing are trademarks of Tripath Technology Inc. Other trademarks referenced in this document are owned by their respective companies Tripath Technology Inc. reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Tripath does not assume any liability arising out of the application or use of any product or circuit described herein ...