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TPS9104

Texas Instruments
Part Number TPS9104
Manufacturer Texas Instruments
Description CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM
Published Sep 26, 2019
Detailed Description D Complete Power-Supply/Audio System For Cellular Handsets D Three Low-Dropout Regulators (LDOs) with 100-mV Dropout D S...
Datasheet PDF File TPS9104 PDF File

TPS9104
TPS9104

Overview
D Complete Power-Supply/Audio System For Cellular Handsets D Three Low-Dropout Regulators (LDOs) with 100-mV Dropout D Speaker and Ringer Power Amplifiers Drive 32-Ω Dynamic Speakers or Piezo Devices D Low-Noise Microphone Amplifier D Depop Protection For All Amplifiers D Less Than 1 µA Supply Current in Shutdown, Typical D 250-ms Microprocessor Reset Output D 10-mA Charge-Pump Driver Configurable For Inverted or Doubled Output D Separate Enables for LDOs, Amplifiers, and Charge Pump D 1.
185-V Reference Capable of Driving 2 mA D 48-Pin TQFP Package TPS9104 CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM SLVS133A – AUGUST 1996 – REVISED APRIL 1998 PT PACKAGE (TOP VIEW) ON SPKR_EN CL VL NC SPKR_IN SPKR_OUT– NC VCC SPKR_OUT+ VB CB GND VCC PL RNGR_OUT+ RNGR_OUT– RNGR_IN RNGR_EN RESET NC AREF VCP GND_CP 48 47 46 45 44 43 42 41 40 39 38 37 1 36 2 35 3 34 4 33 5 32 6 31 7 30 8 29 9 28 10 27 11 26 12 25 13 14 15 16 17 18 19 20 21 22 23 24 GND EN_B PB OFF ON VCC NC EN PA MIC_EN EN_A GND CP EN_CP GND ON_REM NC MIC_OUT MIC_IN– NC MIC_IN+ REF VA CA description NC – No internal connection The TPS9104 incorporates a complete power supply and audio power system for a cellular subscriber terminal that uses battery packs with three or four NiMH/NiCd cells or a single lithium-ion cell.
The device includes three low-dropout linear regulators rated for 3.
3 V or 3 V at 100 mA each, a charge-pump driver, two power amplifiers for a speaker and a ringer, a low-noise microphone amplifier, and logic that includes a 250-ms reset, on/off control, and processor interface.
Regulators A and B and the charge-pump driver are disabled until regulator L (logic regulator) reaches the rated voltage and RESET is logic high.
Regulators A and B, the charge-pump driver, and the amplifiers have separate enables allowing circuitry to be powered up or down as necessary to conserve battery power.
Each of the amplifiers has a depop circuit to prevent objectionable noise when the IC is powered up o...


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