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TPA2100P1YZHR 数据表(PDF) 11 Page - Texas Instruments |
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TPA2100P1YZHR 数据表(HTML) 11 Page - Texas Instruments |
11 / 23 page Vdd SW IN- IN+ GND GND OUT+ OUT- VccOUT VccIN CIN CIN SD SDa GAIN Digital BaseBand Analog Baseband or CODEC VIN 2.5Vto 5.5 V Vref BST 10 nF 1 F m 4.7 H m 10 F m 10~20 W 10~22 H m 10 F m 0.1~2 F m 1 F m R L SPK R C ζ = 2 L ´ ´ (4) AUDMAX SPK 1 = 2 R C ´ ´ ´ f p (5) AUDMAX SPK 1 XC = 2 × × × C f p (6) AUDMAX XL = 2 L f p ´ ´ ´ (7) ( ) 2 2 Z = R + XL XC - (8) OUTPEAK CLASSDPEAK V I = Z (9) RESISTOR – SPEAKER LOAD CONFIGURATION TPA2100P1 www.ti.com ........................................................................................................................................................................................... SLOS595 – DECEMBER 2008 Figure 16. Application Schematic with Resistor – Speaker – Inductor Load Configuration For the resistor – speaker – inductor load configuration, it is desired to make the output load configuration overdamped (Zeta ( ζ) > 0.707). Use Equation 4 to calculate ζ: If ζ is greater than one, then the maximum audio frequency will be limited by the resistor – speaker capacitance low pass filter as shown in Equation 5. Calculate equivalent load impedance with Equation 6, through Equation 9. To calculate the proper boost converter inductor required for this application, see the Inductor Selection section. Note that an input low pass filter should be added before the audio amplifier in order to limit the audio frequency, fAUDMAX. This load configuration is similar to the resistor – speaker – resistor load configuration. Apply the same equations here to calculate the maximum audio frequency and maximum required current from the class-D audio amplifier. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): TPA2100P1 |
类似零件编号 - TPA2100P1YZHR |
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类似说明 - TPA2100P1YZHR |
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