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TPA2005D1DRBR Datasheet(PDF) 1 Page - Texas Instruments |
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TPA2005D1DRBR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 22 page TPA2005D1 SLOS369B – JULY 2002 – REVISED DECEMBER 2002 1.1W MONO FILTERFREE CLASSD AUDIO POWER AMPLIFIER FEATURES D Maximum Battery Life and Minimum Heat – Efficiency With an 8- Ω Speaker: – 84% at 400 mW – 79% at 100 mW – 2.8-mA Quiescent Current – 0.5- µA Shutdown Current D Only Three External Components – Optimized PWM Output Stage Eliminates LC Output Filter – Internally Generated 250-kHz Switching Frequency Eliminates Capacitor and Resistor – Improved PSRR (–71 dB at 217 Hz) and Wide Supply Voltage (2.5 V to 5.5 V) Eliminates Need for a Voltage Regulator – Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor – Improved CMRR Eliminates Two Input Coupling Capacitors APPLICATIONS D Ideal for Wireless or Cellular Handsets and PDAs DESCRIPTION The TPA2005D1 is a 1.1-W high efficiency filter-free class-D audio power amplifier in a MicroStar Junior BGA package that requires only three external components. Features like 84% efficiency, –71-dB PSRR at 217 Hz, improved RF-rectification immunity, and 15 mm2 total PCB area make the TPA2005D1 ideal for cellular handsets. A fast start-up time of 9 ms with minimal pop makes the TP2005D1 ideal for PDA applications. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the TPA2005D1. The device allows independent gain control by summing the signals from each function while minimizing noise to only 48 µVRMS. APPLICATION CIRCUIT _ + IN– IN+ PWM H– Bridge VO+ VO– Internal Oscillator CS To Battery VDD GND Bias Circuitry RI RI + – Differential Input TPA2005D1 SHUTDOWN Actual Solution Size 2.5 mm CS RI RI 6 mm (MicroStar Junior BGA) This document contains information on products in more than one phase of development. The status of each device is indicated on the page(s) specifying its electrical characteristics. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. www.ti.com Copyright 2002, Texas Instruments Incorporated MicroStar Junior is a trademark of Texas Instruments. |
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