TPS9104_05 [TI]
CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM;型号: | TPS9104_05 |
厂家: | TEXAS INSTRUMENTS |
描述: | CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM 蜂窝 |
文件: | 总33页 (文件大小:556K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
Complete Power-Supply/Audio System For
Cellular Handsets
PT PACKAGE
(TOP VIEW)
Three Low-Dropout Regulators (LDOs) with
100-mV Dropout
Speaker and Ringer Power Amplifiers Drive
32-Ω Dynamic Speakers or Piezo Devices
48 47 46 45 44 43 42 41 40 39 38 37
Low-Noise Microphone Amplifier
Depop Protection For All Amplifiers
GND
36
35
34
33
32
31
30
29
28
27
26
25
GND
EN_B
PB
OFF
ON
1
V
CC
2
PL
RNGR_OUT+
RNGR_OUT–
RNGR_IN
RNGR_EN
RESET
3
Less Than 1 µA Supply Current in
Shutdown, Typical
4
5
6
V
NC
250-ms Microprocessor Reset Output
CC
7
10-mA Charge-Pump Driver Configurable
For Inverted or Doubled Output
8
EN
PA
MIC_EN
EN_A
GND
9
NC
AREF
VCP
GND_CP
10
11
12
Separate Enables for LDOs, Amplifiers, and
Charge Pump
13 14 15 16 17 18 19 20 21 22 23 24
1.185-V Reference Capable of Driving 2 mA
48-Pin TQFP Package
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, thecharge-pumpdriver, andtheamplifiershaveseparateenablesallowingcircuitrytobepoweredupordown
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 Ω or into a 90-nF piezoelectric speaker. The microphone amplifier is a low-noise
high-gain (A =100) circuit capable of supplying 3 V peak-to-peak into a 10-kΩ load.
V
The TPS9104 operates over a free-air temperature range of –40°C to 85°C and is supplied in a 48-pin TQFP
package.
AVAILABLE OPTIONS
PACKAGED DEVICE
CHIP FORM
T
A
THIN QFP
(PT)
(Y)
–40°C to 85°C
TPS9104IPT
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 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
functional block diagram
VCP
Charge
Pump
Driver
CP
3
V
CC
GND_CP
EN_CP
EN
VB
LDO
Regulator
B
CB
PB
Voltage
Reference
REF
1 Ω
1 Ω
1 Ω
†
UVLO
and
OTP
VA
LDO
Regulator
A
‡
CA
PA
EN_A
EN_B
VL
LDO
Regulator
L
CL
PL
Reset
Generator
RESET
OFF
ON
ON
ON_REM
SPKR_IN
_
+
SPKR_OUT+
SPKR_OUT–
SPKR_EN
GND
AREF
4
RNGR_IN
MIC_IN+
RNGR_OUT+
RNGR_OUT–
+
_
+
_
MIC_IN–
RNGR_EN
MIC_OUT
MIC_EN
†
‡
UVLO - Undervoltage lockout
OTP - Overtemperature protection
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TPS9104Y chip information
These chips, when properly assembled, display characteristics similar to the TPS9104. Thermal compression
or ultrasonic bonding may be used on the doped aluminum bonding pads. The chips may be mounted with
conductive epoxy or a gold-silicon preform.
BONDING PAD ASSIGNMENTS
36
35
34 33
32
31
29
28 27 26
25
37
38
24
23
22
21
19
CHIP THICKNESS: 15 TYPICAL
BONDING PADS: 3.3 × 3.3 MINIMUM
T
J
max = 150°C
39
TOLERANCES ARE ±10%.
ALL DIMENSIONS ARE IN MILS.
40
42
138
18
16
43
45
46
15
14
47
48
13
1
2
3
4
5
6
7
8
10 11
12
138
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
Terminal Functions
TERMINAL
I/O
DESCRIPTION
Ground. GND terminals should be externally connected to ground to ensure proper functionality.
NAME
NO.
GND
1, 15,
25, 36
V
CC
2, 31,
40
Supplyvoltageinput.V
proper functionality.
terminalsarenotconnectedinternallyandmustbeexternallyconnectedtoensure
CC
PL
3
4
5
6
7
8
I
O
O
I
Program L. PL provides voltage programming input for regulator L.
Ringer amplifier noninverting output
Ringer amplifier inverting output
RNGR_OUT+
RNGR_OUT–
RNGR_IN
RNGR_EN
RESET
Ringer amplifier input
I
Ringer amplifier enable input; logic low enables the amplifier
Microprocessor reset output
O
NC
9, 17,
20, 30
41, 44
No connection
AREF
10
Analog reference. A 0.1-µF capacitor must be connected from AREF to ground. No other connections are
allowed.
VCP
11
12
13
14
16
18
19
21
22
23
24
26
27
28
29
32
33
34
35
37
38
39
42
43
45
46
47
48
Charge pump driver supply voltage
GND_CP
CP
Charge pump driver ground
O
I
Charge pump driver output
EN_CP
ON_REM
MIC_OUT
MIC_IN–
MIC_IN+
REF
Charge pump driver enable input. Logic low on EN_CP turns on the charge pump.
Remote on; logic high enables the part.
I
O
I
Microphone amplifier output
Microphone amplifier inverting input
I
Microphone amplifier noninverting input
O
O
1.185-V reference output. Decouple with 0.01-µF to 0.1-µF capacitor to ground.
Regulator A output voltage
VA
CA
Regulator A filter capacitor connection
EN_A
MIC_EN
PA
I
I
I
Regulator A enable input; logic low turns on the regulator.
Microphone amplifier enable input; logic low turns on the microphone amplifier.
Program A. PA provides programming input for Regulator A.
EN
I/O Enable signal input/output; logic low enables the part.
ON
O
I
On-signal output
OFF
Off signal
PB
I
Program B. PB provides programming input for Regulator B.
Regulator B enable input; logic low turns on the regulator.
Regulator B filter capacitor connection
Regulator B output voltage
EN_B
CB
I
VB
O
O
O
I
SPKR_OUT+
SPKR_OUT–
SPKR_IN
VL
Speaker amplifier noninverting output
Speaker amplifier inverting output
Speaker amplifier input
O
Regulator L output voltage
CL
Regulator L filter capacitor connection
Speaker amplifier enable input; logic low enables the amplifier.
On signal; logic low enables the part.
SPKR_EN
ON
I
I
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
detailed description
voltage reference
The regulators and reset generator utilize an internal 1.185-V band-gap voltage reference. The reference isalso
buffered and brought out on REF for external use; REF can source a maximum of 2 mA. A 0.01-µF to 0.1-µF
capacitor must be connected between REF and ground.
LDO regulators
TheTPS9104includesthreelow-dropoutregulators, implementedwith1-Ω PMOSseries-passtransistors, with
quiescent supply currents of 100 µA. Each of the regulators can supply up to 100 mA of continuous output
current. The 1-Ω PMOS series-pass transistor achieves the dropout voltage of just 100 mV at the maximum
rated output current. Each regulator output voltage can be independently programmed to either 3.3 V or 3 V
using its programming control input PL, PA or PB (Px). A logic low on Px sets the output voltage of the regulator
to 3.3 V; a logic high sets it to 3 V.
Each LDO contains a current limit circuit. When the current demand on the regulator exceeds the current limit,
the output voltage drops in proportion to the excess current. When the excess load current is removed, the
output voltage returns to regulation. Exceeding the current limit on VL can disable the TPS9104. If enough
current demand is placed on VL, the output voltage drops below the reset threshold voltage causing RESET
to go low, effectively unlatching the enable.
VL is intended to be the primary supply voltage for the microprocessor and other system logic functions. VA and
VB can be used to power low-noise analog circuits and/or implement system power management. The enable
terminals EN_A and EN_B are utilized to power down circuitry when it is not required. EN_A and EN_B are
TTL-compatible inputs with 10-µA active current-source pullups. A logic low enables the respective regulator
while a logic high pulls the regulator output voltage to ground and reduces the regulator quiescent current to
leakage levels. Both EN_A and EN_B are not active until RESET is logic high.
Stability of the LDOs is ensured by the addition of compensation terminals CL, CA, and CB, which connect to
the output of the regulator through an internal 1-Ω resistor. This compensation scheme allows for capacitors
with equivalent series resistance (ESR) of up to 15 Ω, eliminating the need for expensive, low-ESR capacitors.
reset generator
RESET is a microprocessor reset signal that goes to logic low at power-up, or whenever VL drops below 2.93 V
(2.6 V for 3-V applications), and remains in that state for 250 ms after VL exceeds the RESET threshold (see
Figure 5). The open-drain output has a 30-µA pullup that eliminates the need for an external pullup resistor and
still allows it to be connected with other open-drain or open-collector signals. RESET is valid for supply voltages
as low as 1.5 V.
ON, OFF, ON, ON_REM and EN functions
The ON input is intended to be the main enable for the TPS9104 and should be connected to ground through
a push-button switch. Once the switch is pressed, internal logic pulls EN low. The EN terminal is designed to
sink 3.2 mA and can be used as a pulldown to enable other functions on the TPS9104 or other system circuitry.
When EN is pulled low, the TPS9104 checks to make sure the supply voltage is above the UVLO threshold
voltage and the die temperature is below 160°C. If both of these conditions are met, the reference circuitry,
regulator L, reset generator, and other support circuitry are enabled. When RESET goes high, the system can
respond with a logic high on OFF, which latches the TPS9104 on, and the ON push button can then be released.
The TPS9104 is disabled in a similar manner. If the ON push button is pressed while the TPS9104 is enabled,
the ON signal responds with a logic high. Once this logic high is detected, the system can respond with a logic
low on OFF, disabling the TPS9104 and reducing supply currents to 1 µA (see Figure 1).
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
The ON_REM signal can be used in the same manner as ON in enabling or disabling the TPS9104. The signal
is provided as a system interface to increase the flexibility of the system. EN can also be used as an input
wired-OR open collector/drain to enable the TPS9104; however, it does not produce a logic signal ON and
therefore cannot be used in the disable sequence described above. It is not recommended that EN be used as
the primary enable signal for the TPS9104.
Enable Sequence
Disable Sequence
ON Must Be Held Low Until
System Responds With A High
Signal At OFF.
ON Is Pressed To Turn Off
The System (Phone).
ON
ON
Once EN Goes Low, The Status Of The
UVLO And The OTP Are Checked.
EN
VL
If The UVLO And OTP Are Valid, VL
And Other Functions Are Enabled.
250 ms
RESET
250 ms After VL Rises Above The Reset
Threshold Voltage, RESET Goes High.
The System Can Now
Respond With A High Signal
At OFF.
Once OFF And RESET Are High,
The Enable Input Is Latched On.
OFF
System Detects The High
Signal At ON And
Responds With a Low
Signal At OFF.
VA
VB
EN_A And EN_B Are both Active And
Low.
Figure 1. Recommended Enable and Disable Sequence
speaker/ringer power amplifiers
The TPS9104 includes two differential-output power amplifiers capable of driving dynamic or piezoelectric
speakers. Both amplifiers have enable inputs to reduce supply current to leakage levels when the amplifiers
are not in use. Depopping circuitry prevents objectionable noise when the enable inputs are cycled on or off.
Each amplifier requires only two gain-setting resistors and a capacitor for dc blocking (see Figure 46).
RNGR_EN and SPKR_EN inputs are disabled when RESET is asserted. Both the SPKR_EN and the
RNGR_EN have internal 10-µA pullups.
microphone amplifier
This is a high-gain amplifier capable of driving a 10-kΩ load at 3 V peak-to-peak output. MIC_EN input is
disabled when RESET is asserted. The microphone amplifier has an enable input that reduces supply current
to leakage levels when disabled. Added depopping circuitry prevents objectionable noise when the enable input
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
is cycled on or off. The microphone amplifier needs only two resistors to set the gain, and one capacitor for dc
blocking (see Figure 47). Regulator A is the analog supply for the microphone amplifier, and EN_A must be
asserted for correct operation.
undervoltage lockout
Undervoltage lockout (UVLO) prevents operation of the functions in the TPS9104 until the supply voltage
exceeds the threshold voltage, eliminating abnormal power-up conditions internally and externally, and
providing an orderly turn-on.
overtemperature shutdown
If the die temperature exceeds 160°C, the thermal protection circuit shuts off the TPS9104. When the die
temperature drops below 150°C, the device can be restarted with the ON input.
charge pump driver
An unregulated inverting or doubler charge pump is implemented (see Figure 44) by connecting a network of
two capacitors and two diodes to CP. In the inverting configuration, the charge pump can power an LCD or
provide gate bias for a GaAs power amplifier. A 5-V supply for flash-memory programming or powering the
subscriber identity module (SIM) European applications can be achieved using the doubler configuration and
an external LDO. A logic-low input to the charge-pump enable, EN_CP, turns on the oscillator and driver; a logic
high turns them off. EN_CP input is disabled when RESET is asserted. The EN_CP has a 10-µA internal pullup.
DISSIPATION RATING TABLE 1 – Free-Air Temperature
T
≤ 25°C
DERATING FACTOR
T
= 70°C
T = 85°C
A
POWER RATING
A
A
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING
A
PT
1350 mW
10.8 mW/°C
864 mW
702 mW
DISSIPATION RATING TABLE 2 – Case Temperature
≤ 25°C DERATING FACTOR = 70°C
T
C
T
C
T = 85°C
POWER RATING
C
PACKAGE
POWER RATING
ABOVE T = 25°C
POWER RATING
C
PT
6579 mW
52.6 mW/°C
4212 mW
3423 mW
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
MAXIMUM CONTINUOUS POWER DISSIPATION
MAXIMUM CONTINUOUS POWER DISSIPATION
vs
vs
FREE-AIR TEMPERATURE
1400
CASE TEMPERATURE
7000
6000
1200
1000
800
5000
4000
3000
R
= 19°C/W
R
= 93°C/W
θJC
θJA
600
2000
1000
0
400
200
0
25
50
75
100
125
150
25
50
75
100
125
150
T
A
– Case Temperature – °C
T
A
– Free-Air Temperature – °C
Figure 2
Figure 3
†‡
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V , VCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 12 V
CC
Input voltage range at OFF, MIC_EN, SPKR_EN, RNGR_EN, SPKR_IN,
RNGR_IN, MIC_IN+, MIC_IN– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
Input voltage range at PL, PA, PB, EN, EN_A, EN_B,
ON, ON_REM, EN_CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
CC
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table
Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited
Output current range at SPKR_OUT+, SPKR_OUT–,
RNGR_OUT+, RNGR_OUT– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –100 mA to 100 mA
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating table
Operating free-air temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C
A
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
Lead Temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
†
‡
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltages are with respect to GND.
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
recommended operating conditions
MIN NOM
MAX
10
UNIT
V
Supply voltage, V , VCP
CC
3
0
Input voltage, OFF, MIC_EN, SPKR_EN, RNGR_EN
Input voltage at PL, PA, PB, EN, EN_A, EN_B, ON, ON_REM, EN_CP
Reference output current
5
V
0
V
V
CC
2
0
mA
mA
°C
Continuous regulator output current
0
100
85
Operating free-air temperature
–40
electrical characteristics over recommended operating free-air temperature range,
= VCP = 4 V, Px = 0 V, I = 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF
V
CC
O(Vx)
(unless otherwise noted)
voltage reference (REF)
PARAMETER
†
TEST CONDITIONS
= 0
MIN
TYP
MAX
UNIT
V
T
= 25°C,
I
1.185
A
O
Output voltage
4 V ≤ V
≤ 10 V,
0 ≤ I ≤ 2 mA
1.161
1.209
V
CC
O
LDO regulators
PARAMETER
†
TEST CONDITIONS
MIN
3.25
3.2
TYP
MAX
3.35
3.4
UNIT
T
= 25°C
3.3
V
V
V
A
0 ≤ I
≤ 100 mA,
3.5 V ≤ V
≤ 10 V
CC
O(Vx)
Output voltage at VA, VB, VL (Vx)
Px = V
,
T
A
= 25°C
2.95
3
3.05
CC
Px = V
3.2 V ≤ V
0 ≤ I
O(Vx)
≤ 100 mA,
CC,
CC
2.9
3.10
200
V
≤ 10 V
Dropout voltage
I
I
I
= 100 mA,
V
= 3.2 V
100
30
mV
mV
mV
dB
O(Vx)
O(Vx)
O(Vx)
CC
CC
Load regulation
= 0 mA to 100 mA
= 100 mA,
Line regulation
V
= 3.5 V to 10 V
10
Ripple rejection
f = 120 Hz
60
Quiescent current (each regulator)
100
µA
charge pump driver
PARAMETER
Frequency
TEST CONDITIONS
MIN
TYP
100
50%
15
MAX
UNIT
50
150
kHz
Duty cycle
Output resistance
30
Ω
†
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be
taken into account separately.
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
electrical characteristics over recommended operating free-air temperature range,
V
= VCP = 4 V, Px = 0 V, I
= 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF
CC
O(Vx)
(unless otherwise noted) (continued)
speaker amplifier/ringer amplifier
PARAMETER
†
TEST CONDITIONS
Single-ended, = 32 Ω
A = 1 V/V
MIN
TYP
2
MAX
UNIT
V
Output voltage swing
Output offset voltage
R
1.6
L
15
30
mV
v
V
= 1 V,
f = 1 kHz,
= 32 Ω
I(PP)
A = 1 V/V,
Total harmonic distortion (THD)
0.5%
1%
R
v
L
Gain bandwidth product (GBW)
Input noise
A = 10 V/V
v
4
20
200
kHz
µVrms
mA
100 Hz ≤ BW ≤ 100 kHz
Quiescent current (each amplifier)
2
PL = V
CC
PL = 0 V
1.221
1.345
Reference voltage, AREF
V
microphone amplifier
PARAMETER
†
TEST CONDITIONS
MIN
1
TYP
MAX
VA –1
1
UNIT
V
Common mode input voltage range
Input bias current
Both inputs = VA/2
–1
2.7
µA
V
Output voltage swing
Output offset voltage
10 kΩ load,
VA = 3.3 V
3
A = 1 V/V
v
6
mV
f = 1 kHz,
Output voltage swing = 1 V, V
A
= 100 V/V,
O(PP)
V
Total harmonic distortion (THD)
0.5%
1%
Power-supply rejection ratio (PSRR)
Common-mode rejection ratio (CMRR)
Gain bandwidth product (GBW)
Input noise
A = 100 V/V
100
80
dB
dB
v
A = 100 V/V
v
A = 100 V/V
v
4
kHz
µVrms
µA
100 Hz ≤ BW ≤ 100 kHz
10
Quiescent current
180
RESET
†
PARAMETER
TEST CONDITIONS
MIN
2.871
2.548
125
TYP
MAX
UNIT
V
Input threshold voltage
Input threshold voltage
Timeout delay at RESET
Low-level output voltage
High-level output current
Low-level output current
Hysteresis
VL voltage decreasing
VL voltage decreasing,
See Figure 5
2.93 2.989
2.6 2.652
PL = V
V
CC
250
375
0.4
–20
3.2
ms
V
I
= 1 mA,
V
CC
= 1.5 V
O
V
= 2.4 V
= 0.4 V
–40
µA
mA
mV
O
O
V
40
logic inputs at EN_A, EN_B, SPKR_EN, RNGR_EN, MIC_EN, EN_CP
PARAMETER
High-level input voltage
Low-level input voltage
Input current
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
2
0.8
1
V
–20
–10
µA
†
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be
taken into account separately.
10
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
electrical characteristics over recommended operating free-air temperature range,
= VCP = 4 V, Px = 0 V, I = 35 mA, OFF = VL, ON open, ON_REM = 0 V, Cx = 10 µF
V
CC
O(Vx)
(unless otherwise noted) (continued)
logic inputs at PL, PA, PB, OFF, ON_REM
PARAMETER
TEST CONDITIONS
TEST CONDITIONS
MIN
TYP
TYP
MAX
UNIT
V
High-level input voltage
Low-level input voltage
Input current
2
0.8
1
V
–1
µA
†
logic inputs at ON
PARAMETER
MIN
MAX
UNIT
V
High-level input voltage
Low-level input voltage
Input current
2
0.8
1
V
–20
µA
†
logic inputs at EN
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
High-level input voltage
Low-level input voltage
Source current
2.4
0.8
1
V
V
V
= 2.4 V
= 0.4 V
OFF = 0
–50
–30
µA
mA
O
Sink current
3.2
O
logic outputs at ON
PARAMETER
High-level output voltage
Low-level output voltage
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
1-mA source current
1-mA sink current
2.4
0.4
V
overtemperature shutdown
PARAMETER
Temperature threshold
Temperature hysteresis
TEST CONDITIONS
MIN
TYP
160
10
MAX
UNIT
°C
°C
undervoltage lockout (UVLO)
PARAMETER
TEST CONDITIONS
increasing
MIN
TYP
MAX
UNIT
V
Threshold
V
CC
1.80
2.52
Hysteresis
50
mV
supply current
PARAMETER
Shutdown
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OFF = 0 V
0.5
10
µA
EN_CP = VCP,
RNGR_EN = VL,
SPKR_EN = VL,
MIC_EN = VL
Operating
0.7
1
mA
†
High and low level voltages are dependent on V . See graphs.
CC
11
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TPS9104Y electrical characteristics, T = 25°C, V
= VCP = 4 V, Px = 0 V, I
= 35 mA,
O(Vx)
J
CC
OFF = VL, ON open, ON_REM = 0 V, Cx 10 µF (unless otherwise noted)
=
voltage reference (REF)
†
PARAMETER
Output voltage
MIN
TYP
MAX
UNIT
TEST CONDITIONS
TEST CONDITIONS
I
= 0
1.185
V
O
LDO Regulators
†
PARAMETER
MIN
TYP
3
MAX
UNIT
V
Output voltage at VA, VB, VL (Vx)
Dropout voltage
P = V
2.95
3.05
x
CC
I
I
I
= 100 mA,
V
= 3.2 V
CC
100
30
mV
mV
mV
dB
O(Vx)
O(Vx)
O(Vx)
Load regulation
= 0 mA to 100 mA
= 100 mA,
Line regulation
V
CC
= 3.5 V to 10 V
10
Ripple rejection
f = 120 Hz
60
Quiescent current (each regulator)
100
µA
charge pump driver
PARAMETER
Frequency
TEST CONDITIONS
MIN
MIN
TYP
100
50%
15
MAX
MAX
UNIT
kHz
Duty cycle
Output resistance
Ω
speaker amplifier/ringer amplifier
PARAMETER
†
TEST CONDITIONS
Single-ended, = 32 Ω
A = 1 V/V
TYP
2
UNIT
V
Output voltage swing
Output offset voltage
R
L
15
mV
v
V
= 1 V,
f = 1 kHz,
= 32 Ω
I(PP)
A = 1 V/V,
Total harmonic distortion (THD)
0.5%
R
v
L
Gain bandwidth product (GBW)
Input noise
A = 10 V/V
v
20
200
kHz
µVrms
mA
100 Hz ≤ BW ≤ 100 kHz
Quiescent current (each amplifier)
2
PL = V
1.221
1.345
CC
Reference, AREF
V
PL = 0 V
microphone amplifier
PARAMETER
†
TEST CONDITIONS
MIN
1
TYP
MAX
UNIT
V
Common mode input range
Output voltage swing
Output offset voltage
VA –1
10 kΩ load,
VA = 3.3 V
2.7
3
V
A = 1 V/V
v
6
mV
RESET
†
PARAMETER
Threshold voltage
Threshold voltage
Delay
TEST CONDITIONS
MIN
TYP
2.93
2.6
MAX
UNIT
V
VL voltage decreasing
VL voltage decreasing,
See Figure 5
PL = V
V
CC
250
40
ms
mV
Hysteresis
†
Pulse-testing techniques are used to maintain virtual junction temperature as close as possible to ambient temperature; thermal effect must be
taken into account separately.
12
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
V
CC
40
2
31
11
13
12
22
Voltage
Reference
Charge Pump
Driver
REF
0.1 µF
38
37
REF
Regulator
B
+
10 µF
14
35
26
34
23
24
Regulator
A
+
10 µF
28
VL
45
46
Regulator
L
+
3
10 µF
Reset
Generator
8
RESET
29
48
EN
ON
33
32
OFF
ON
16
43
ON_REM
42
_
LOAD
39
47
+
VL
10
6
0.1 µF
4
+
_
LOAD
5
7
21
19
LOAD
V
+
_
I(test)
18
27
0.1 µF
36
1
25
15
Figure 4. Test Circuit
13
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
VL
V
IT+
t
RESET
RESET
Timeout Delay
t
Figure 5. RESET Timing Diagram
5
4
3
V
= 4 V
CC
Px = 0 V
Enable
T
= 25°C
= 0 mA
A
O
2
1
I
Cx = 10 µF
0
4
3
2
1
0
V
O
0
4
8
12
16
20
t – Time – ms
Figure 6. LDO Regulator Output Voltage Rise Time and Fall Time
14
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
125
100
75
V
= 4 V
CC
Px = 0 V
= 25°C
T
A
Cx = 10 µF
50
25
0
3.5
3.4
3.3
3.2
3.1
0
0.5
1
1.5
2
t – Time – ms
Figure 7. LDO Regulator Load Transient, 1 mA to 100 mA Pulsed Load
4.4
4.2
4
3.8
3.6
3.4
3.3
Px = 0 V
3.2
T
= 25°C
= 10 mA
A
I
O
Cx = 10 µF
3.1
0
0.3
0.5
0.8
1
t – Time – ms
Figure 8. LDO Regulator Line Transient
15
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
5
4
3
V
T
= 4 V
CC
= 25°C
A
Px = 0 V
2
1
3.5
3
2.5
2
1.5
1
0.5
0
10
20
30
40
50
t – Time – µs
Figure 9. Microphone Enable Output Response
5
V
= 4 V
CC
= 25°C
4
3
T
A
Px = 0 V
2
1
0
2.5
2
1.5
1
0.5
0
10
20
30
40
50
t – Time – µs
Figure 10. Speaker Enable Output Response
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
PARAMETER MEASUREMENT INFORMATION
5
V
= 4 V
CC
= 25°C
4
3
T
A
Px = 0 V
2
1
0
3
2.5
2
1.5
1
0.5
0
10
20
30
40
50
t – Time – µs
Figure 11. Ringer Enable Output Response
4
4
3
V
= 4 V
V
= 4 V
CC
= 25°C
CC
T = 25°C
A
T
A
Px = 0 V
Px = 0 V
3
2
1
0
2
1
0
0
10
20
30
40
50
0
10
20
30
40
50
t – Time – µs
t – Time – µs
Figure 12. Microphone Slew Rate, Rising
Figure 13. Microphone Slew Rate, Falling
17
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
I
Quiescent current
Dropout voltage
vs Supply voltage
CC
vs Output current
vs Junction temperature
vs Junction temperature
vs Supply voltage
vs Supply voltage
vs Output current
vs Supply voltage
vs Supply voltage
vs Supply voltage
vs Supply voltage
vs Frequency
∆V
Change in output voltage
Output voltage, VL
O
V
O
∆V
Change in output voltage
Change in output voltage
Shutdown current
O
O
∆V
I
CC
Threshold, ON
Threshold, EN
Threshold, ON_REM
Ripple rejection
Output spectral noise density
Change in frequency, CP
Output resistance into CP
Output resistance out of CP
Maximum peak output voltage
vs Frequency
vs Junction temperature
vs Supply voltage
vs Supply voltage
vs Load resistance
vs Frequency
r
r
O
O
V
OM
THD
Total harmonic distortion
vs Load resistance
vs Frequency
k
Power supply rejection ratio
Output noise voltage
SVR
V
V
V
vs Frequency
n
Output voltage
vs Junction temperature
vs Load
O
Maximum peak output voltage
OM
vs Frequency
THD
Total harmonic distortion
vs Load resistance
vs Frequency
k
Power supply rejection ratio
Closed-loop gain and phase shift
Output noise voltage
SVR
vs Frequency
V
vs Frequency
n
Φ
Phase margin
vs Load capacitance
m
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
LDO REGULATORS
DROPOUT VOLTAGE
vs
QUIESENT CURRENT
vs
OUTPUT CURRENT
SUPPLY VOLTAGE
160
140
120
100
80
1
Px = 0
= 0
T
A
= 25°C
I
O
0.9
0.8
0.7
85°C
Px = V
CC
60
25°C
Px = 0
–40°C
40
0.6
0.5
20
0
3
4
5
6
7
8
9
10
0
10 20 30 40 50 60 70 80 90 100
– Output Current – mA
V
CC
– Supply Voltage – V
I
O
Figure 14
Figure 15
LDO REGULATORS
LDO REGULATORS
CHANGE IN OUTPUT VOLTAGE
vs
JUNCTION TEMPERATURE
DROPOUT VOLTAGE
vs
JUNCTION TEMPERATURE
10
8
140
130
120
110
V
= 4 V
CC
I
= 100 mA
O
Px = 0
Px = 0
6
I
O
= 0 mA
4
2
0
100
90
–2
–4
–6
I
O
= 100 mA
80
70
–8
–10
60
–50
–50 –25
0
T
25
50
75
100
125
–25
0
25
50
75
100 125
– Temperature – °C
T
– Temperature – °C
J
J
Figure 17
Figure 16
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
LDO REGULATORS
CHANGE IN OUTPUT VOLTAGE
vs
REGULATOR L
OUTPUT VOLTAGE
vs
SUPPLY VOLTAGE
SUPPLY VOLTAGE
3.5
3
4
3
2
Px = 0
= 25°C
EN = 0
Px = 0 or
Px = V
T
A
CC
T
I
= 25°C
= 35 mA
A
O
2.5
2
1
0
1.5
1
–1
–2
–3
–4
0.5
0
3
4
5
6
7
8
9
10
2
2.2 2.4 2.6 2.8
3
3.2 3.4 3.6 3.8
4
V
CC
– Supply Voltage – V
V
CC
– Supply Voltage – V
Figure 19
Figure 18
LDO REGULATORS
CHANGE IN OUTPUT VOLTAGE
vs
SHUTDOWN CURRENT
vs
SUPPLY VOLTAGE
OUTPUT CURRENT
4
20
V
= 4 V
CC
Px = 0 or Px = V
OFF = 0
CC
3.5
15
10
T
A
= 25°C
3
2.5
2
5
0
–5
1.5
1
0.5
0
–10
–15
–20
T
A
= 25°C
T
= 85°C
A
T
A
= 40°C
2
3
4
5
6
7
8
9
10
0
10 20 30 40 50 60 70 80 90 100
V
CC
– Supply Voltage – V
I
O
– Output Current – mA
Figure 21
Figure 20
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
INPUT THRESHOLD VOLTAGE, EN
INPUT THRESHOLD VOLTAGE, ON
vs
vs
SUPPLY VOLTAGE
SUPPLY VOLTAGE
4.9
4.4
1.8
1.6
1.4
1.2
1
OFF = 0 V
EN = Open
ON_REM = 0 V
OFF = 0 V
ON = Open
ON_REM = 0 V
–40°C
3.9
25°C
85°C
3.4
2.9
2.4
1.9
1.4
0.8
2
3
4
5
6
7
8
9
10
2
4
6
8
10
V
CC
– Supply Voltage – V
V
CC
– Supply Voltage – V
Figure 23
Figure 22
LDO REGULATORS
INPUT THRESHOLD VOLTAGE, ON_REM
RIPPLE REJECTION
vs
vs
SUPPLY VOLTAGE
FREQUENCY
80
60
4
EN = Open
ON = Open
OFF = 0 V
3.5
3
2.5
2
1.5
1
40
20
V
T
= 4 V
= 25°C
CC
A
Cx = 10 µF
= 35 mA
I
O
2
3
4
5
6
7
8
9
10
0.01
0.1
1
10
100
1000
V
CC
– Supply Voltage – V
f – Frequency – kHz
Figure 25
Figure 24
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
REGULATOR L
CHANGE IN FREQUENCY, CP
vs
JUNCTION TEMPERATURE
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
4
3
100
10
1
VCP = 4 V
V
= 4 V
CC
Px = 0 V
T
= 25°C
= 35 mA
A
O
I
2
1
0
–1
–2
–3
–50
–25
0
25
T – Temperature – °C
J
50
75
100
125
1
10
100
1000
10000
f – Frequency – Hz
Figure 27
Figure 26
OUTPUT RESISTANCE, CP
vs
OUTPUT RESISTANCE, CP
vs
SUPPLY VOLTAGE
SUPPLY VOLTAGE
30
25
30
25
20
Current Into CP
Current Out of CP
20
15
10
85°C
25°C
15
85°C
10
5
–40°C
25°C
5
0
–40°C
0
3
4
5
6
7
8
9
10
3
4
5
6
7
8
9
10
V
– Supply Voltage – V
V
– Supply Voltage – V
CC(VCP)
CC(VCP)
Figure 29
Figure 28
22
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
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SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
SPEAKER AND RINGER AMPLIFIERS
TOTAL HARMONIC DISTORTION
vs
SPEAKER AND RINGER AMPLIFIERS
MAXIMUM PEAK OUTPUT VOLTAGE
vs
FREQUENCY
LOAD RESISTANCE
3
2
1
3
Px = 0 V
= 4 V
Px = 0 V
= 4 V
V
CC
= 25°C
2.8
V
CC
= 25°C
T
A
T
A
V
R
A
= 1 V
O(PP)
2.6
2.4
2.2
f = 1 kHz
= 1 V/V
= 32 Ω
L
A
v
= 1 V/V
v
2
1.8
1.6
1.4
1.2
1
0
0.1
1
10
10
100
1000
f – Frequency – kHz
R
– Load Resistance – Ω
L
Figure 31
Figure 30
SPEAKER AND RINGER AMPLIFIERS
SPEAKER AND RINGER AMPLIFIERS
TOTAL HARMONIC DISTORTION
vs
POWER SUPPLY REJECTION RATIO
vs
LOAD RESISTANCE
FREQUENCY
0.6
0.5
0.4
0.3
0.2
100
80
Px = 0 V
Px = 0 V
V = 4 V
CC
= 25°C
V
T
= 4 V
CC
= 25°C
T
A
A
f = 1 kHz
= 1 V
V
A
O(PP)
= 1 V/V
v
60
40
20
0
0.1
0
0
500
1000
1500
2000
2500
3000
0.01
0.1
1
10
100
1000
R
– Load Resistance – Ω
f – Frequency – kHz
L
Figure 33
Figure 32
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
SPEAKER AND RINGER AMPLIFIERS
OUTPUT NOISE VOLTAGE
vs
SPEAKER AND RINGER AMPLIFIERS
OUTPUT VOLTAGE
vs
FREQUENCY
JUNCTION TEMPERATURE
2.2
2.1
2
200
Px = 0 V
= 4 V
Px = 0 V
V
V = 4 V
CC
T = 25°C
CC
A
150
100
1.9
1.8
1.7
50
0
1.6
–55
–25
0
T
25
50
75
100
125
0.1
1
10
– Temperature – °C
f – Frequency – kHz
J
Figure 35
Figure 34
MICROPHONE AMPLIFIER
MICROPHONE AMPLIFIER
TOTAL HARMONIC DISTORTION
MAXIMUM PEAK OUTPUT VOLTAGE
vs
vs
FREQUENCY
LOAD RESISTANCE
0.24
0.22
3.5
3
V
= 4 V
V
= 4 V
CC
CC
Px = 0 V
= 25°C
Px = 0 V
T
T
= 25°C
A
A
f = 1 kHz
A
v
= 100 V/V
0.2
2.5
2
0.18
0.16
1.5
0.14
0.12
1
100
1 k
10 k
100 k
0.1
1
10
R
L
– Load Resistance – Ω
f – Frequency – kHz
Figure 37
Figure 36
24
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
MICROPHONE AMPLIFIER
POWER SUPPLY REJECTION RATIO
MICROPHONE AMPLIFIER
TOTAL HARMONIC DISTORTION
vs
vs
FREQUENCY
LOAD RESISTANCE
100
80
0.35
V
= 4 V
V
= 4 V
CC
Px = 0 V
CC
Px = 0 V
T = 25°C
A
T
A
= 25°C
0.3
0.25
60
0.2
40
20
0.15
0.1
0.01
0.1
1
10
100
1000
0
10
20
30
40
50
60
f– Frequency – kHz
R
– Load Resistance – kΩ
L
Figure 39
Figure 38
MICROPHONE AMPLIFIER
MICROPHONE AMPLIFIER
CLOSED-LOOP GAIN AND PHASE SHIFT
OUTPUT NOISE VOLTAGE
vs
vs
FREQUENCY
FREQUENCY
225°
40
30
20
100
V
= 4 V
V
= 4 V
CC
Px = 0 V
CC
Px = 0 V
T = 25°C
A
A
R
T
A
= 100
= 10 kΩ
= 25°C
v
L
180°
135°
80
60
40
Gain
Phase
10
0
90°
20
0
45°
0°
–10
1
10
100
1000
10000
1
10
100
1000
f – Frequency – Hz
f – Frequency – kHz
Figure 41
Figure 40
25
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
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SLVS133A – AUGUST 1996 – REVISED APRIL 1998
TYPICAL CHARACTERISTICS
MICROPHONE AMPLIFIER
PHASE MARGIN
vs
LOAD CAPACITANCE
80°
60°
V
= 4 V
CC
Px = 0 V
T
A
= 25°C
40°
20°
0°
0
0.2
0.4
0.6
0.8
1
C
– Load Capacitance – µF
L
Figure 42
26
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
THERMAL INFORMATION
Using thermal resistance, junction-to-ambient (R
equation:
), maximum power dissipation can be calculated with the
θJA
T
T
J(max)
R
A
P
D(max)
JA
Where T
is the maximum allowable junction temperature or 125°C.
J(max)
This limit should then be applied to the internal power dissipation of the TPS9104. The equation for calculating
total internal power dissipation of the TPS9104 is:
P
V
V
I
V
I
D(max)
I
X
X
I
Q
x
Many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces,
andthepresenceofotherheat-generatingcomponentsaffectthepowerdissipationlimitsofagivencomponent.
Three basic approaches for enhancing thermal performance are:
•
•
•
Improving the power dissipation capability of the PWB design
Improving the thermal coupling of the component to the PWB
Introducing airflow in the system
27
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
BATTERY
1 µF
Voltage
Reference
REF
0.1 µF
Charge Pump
4.7 µF
RF
Section
REF
Regulator
B
3.3 V
7–13 µF
Analog
Section
Regulator
A
3.3 V
7–13 µF
Regulator
L
3.3 V
7–13 µF
Reset
Generator
RESET
OFF
Processor
and
Logic
EN
ON
ON
Section
ON_REM
Audio
Speaker
SPKR_IN
RNGR_IN
_
+
VL
SPKR_EN
0.1 µF
+
_
Ringer
Speaker
RNGR_EN
+
_
REF
MIC
0.1 µF
MIC_EN
GND
Figure 43. Typical Application
28
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
LDOs (VL, VA, VB) output capacitors
A 10-µF capacitor must be tied to Cx (CL, CA, or CB). The Cx terminal is connected internally to the output of
the LDO through a 1-Ω resistor. The stability of LDOs is dependent on the ESR of the output filter capacitor. Most
LDOs are designed to be stable over a narrow range of ESR with lower limits and upper limits, thus limiting the
type of capacitor that can be used. With the use of the internal 1-Ω resistor, the lower ESR limit of the capacitor
is eliminated, permitting the upper limit to be raised. Therefore, almost any tantalum or ceramic capacitor can
be used, provided the ESR does not exceed 15 Ω over temperature.
charge pump design
V
CC
V
CC
VCP
CP
VCP
CP
C1
C1
V
O
V
O
+
C2
C2
+
GND_CP
GND_CP
a. Voltage Inverter
b. Voltage Doubler
Figure 44. Charge Pump Configurations
The charge-pump terminal can drive either a voltage inverter or a voltage doubler. In either case only two
capacitors and two signal diodes are needed. The output voltage is unregulated and a regulator may be added
if needed.
The charge transfer of C1 is:
(
)
V
O
q
C1
V
CC
This occurs f times a second and the charge transfer per unit time (current) is:
(
)
V
I
f
C1
V
O
CC
Rewriting this equation in the form of I = V/R
V
V
CC
f
O
I
1
C1
1
where
is an equivalent resistor.
f
C1
29
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
charge pump design (continued)
An equivalent circuit can now be drawn taking the diodes into account.
R
R
R
R
equiv
internal
equiv
internal
–(V
–V
)
2V
–V
CC diode
CC diode
+
C2
C2
+
a. Voltage Inverter
b. Voltage Doubler
Figure 45. Equivalent Circuit
The output voltage for the doubler is then:
V
2
V
2
V
I
R
CC
diode
O
total
O
and the output voltage for the inverter is:
(
)
V
V
2
V
I
R
CC
diode
O
total
O
To determine the size of C1 use
I
C
f
V
where f = 100,000 and ∆V = ripple voltage.
For an output current of 10 mA calculate
0.01 A
C1
1 F
100 kHz
0.1 V
ripple
Because of losses caused by diode switching and ESR, the calculated capacitance should be multiplied by 1.5
to 2. A 2-µF capacitance should drive a 10-mA voltage doubler or inverter.
amplifier design
TPS9104
SPKR_OUT+
or RNGR_OUT+
AREF
+
–1
_
C2
0.1 µF
Speaker
SPKR_IN
SPKR_OUT–
or RNGR_IN
or RNGR_OUT–
Audio In
C1
R1
R2
Figure 46. Speaker and Ringer Amplifiers
30
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
APPLICATION INFORMATION
amplifier design (continued)
The speaker and ringer amplifiers are capable of driving either dynamic or piezoelectric speakers. The gain is
set with two external resistors connected as shown. There is an inverting stage and a noninverting stage, both
of which can drive a speaker differentially. When the speaker is connected in the differential mode, the gain is
doubled. The gain equation is
R2
R1
G
2
Typically R2 is in the range of 10 kΩ to 100 kΩ and the gain can be as high as 10. The noninverting amplifier
input is connected to the internal reference and should be bypassed with a 0.1-µF capacitor. The audio input
signal must be capacitor-coupled (refer to C1 in Figure 47). R1 and C1 determine the low-frequency pole (f )
p
location. The frequency response of the input RC is:
1
f
p
2
R1 C1
For a 0.22-µF capacitor and a 1-kΩ resistor, the 3-dB point is
1
f
750 Hz
p
2
1K 0.22
F
Both V
and VL supply power to the speaker and ringer amplifiers. The output of VL is used to power the
CC
high-gain input stage, and V
capacitive load, series resistance should be added to minimize signal distortion.
is used to power the low-gain high-current output stage. When driving a highly
CC
TPS9104
+
_
MIC_IN+
MIC_OUT
MIC_IN–
R1
Microphone
C1
R2
Figure 47. Microphone Amplifier
This is a high-gain amplifier capable of driving a 10 kΩ load at 3 V. The gain is set using two external resistors,
R2
R1
G
R1 and R2. A low noise reference must be connected to MIC_IN+. The gain equation is:
. Typically
R2 can be in the range of 10 kΩ to 100 kΩ and the gain can be up to 100. The microphone must be either
capacitor-coupled (C1) or tied to the reference. The closed-loop –3 dB point for this amplifier is a minimum of
4 kHz. The location of the low-frequency pole can be calculated using
1
f
p
.
2
R1 C1
31
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
MECHANICAL DATA
PT (S-PQFP-G48)
PLASTIC QUAD FLATPACK
0,27
0,17
M
0,08
0,50
36
25
37
24
48
13
0,13 NOM
1
12
5,50 TYP
7,20
SQ
6,80
Gage Plane
9,20
SQ
8,80
0,25
0,05 MIN
0°–7°
1,45
1,35
0,75
0,45
Seating Plane
0,10
1,60 MAX
4040052/C 11/96
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-026
D. This may also be a thermally enhanced plastic package with leads conected to the die pads.
32
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor
product or service without notice, and advises its customers to obtain the latest version of relevant information
to verify, before placing orders, that the information being relied on is current and complete.
TI warrants performance of its semiconductor products and related software to the specifications applicable at
the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are
utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each
device is not necessarily performed, except those mandated by government requirements.
Certain applications using semiconductor products may involve potential risks of death, personal injury, or
severe property or environmental damage (“Critical Applications”).
TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED
TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS.
Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI
products in such applications requires the written approval of an appropriate TI officer. Questions concerning
potential risk applications should be directed to TI through a local SC sales office.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards should be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein. Nor does TI warrant or represent that any license, either
express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property
right of TI covering or relating to any combination, machine, or process in which such semiconductor products
or services might be or are used.
Copyright 1998, Texas Instruments Incorporated
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