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TPS9104PT Datasheet

  • TPS9104PT

  • CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM

  • 33頁

  • TI

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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A 鈥?AUGUST 1996 鈥?REVISED APRIL 1998
D
D
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D
description
NC 鈥?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 or when
the amplifiers are enabled. Both the speaker amplifier and the ringer amplifier are designed to supply
2 V peak-to-peak into 32
鈩?/div>
or into a 90-nF piezoelectric speaker. The microphone amplifier is a low-noise
high-gain (A
V
=100) circuit capable of supplying 3 V peak-to-peak into a 10-k鈩?load.
The TPS9104 operates over a free-air temperature range of 鈥?0擄C to 85擄C and is supplied in a 48-pin TQFP
package.
AVAILABLE OPTIONS
PACKAGED DEVICE
TA
鈥?40擄C to 85擄C
THIN QFP
(PT)
TPS9104IPT
CHIP FORM
(Y)
TPS9104Y
The PT package is available taped and reeled. Add R suffix to the device
type when ordering (e.g. TPS9104IPTR).
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.
Copyright
漏
1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
CP
EN_CP
GND
ON_REM
NC
MIC_OUT
MIC_IN鈥?/div>
NC
MIC_IN+
REF
VA
CA
Complete Power-Supply/Audio System For
Cellular Handsets
Three Low-Dropout Regulators (LDOs) with
100-mV Dropout
Speaker and Ringer Power Amplifiers Drive
32-鈩?Dynamic Speakers or Piezo Devices
Low-Noise Microphone Amplifier
Depop Protection For All Amplifiers
Less Than 1
碌A(chǔ)
Supply Current in
Shutdown, Typical
250-ms Microprocessor Reset Output
10-mA Charge-Pump Driver Configurable
For Inverted or Doubled Output
Separate Enables for LDOs, Amplifiers, and
Charge Pump
1.185-V Reference Capable of Driving 2 mA
48-Pin TQFP Package
PT PACKAGE
(TOP VIEW)
ON
SPKR_EN
CL
VL
NC
SPKR_IN
SPKR_OUT鈥?/div>
NC
VCC
SPKR_OUT+
VB
CB
48 47 46 45 44 43 42 41 40 39 38 37
GND
VCC
PL
RNGR_OUT+
RNGR_OUT鈥?/div>
RNGR_IN
RNGR_EN
RESET
NC
AREF
VCP
GND_CP
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
36
35
34
33
32
31
30
29
28
27
26
25
GND
EN_B
PB
OFF
ON
VCC
NC
EN
PA
MIC_EN
EN_A
GND
1

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