參數(shù)資料
型號(hào)： TPS9104Y
廠商： Texas Instruments, Inc.
英文描述： CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM
中文描述： 移動(dòng)用戶終端電源/音頻系統(tǒng)
文件頁(yè)數(shù)： 7/33頁(yè)
文件大?。?/td> 557K
代理商： TPS9104Y
TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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-
μ
A internal pullup.
DISSIPATION RATING TABLE 1 – Free-Air Temperature
PACKAGE
TA
≤
25
°
C
POWER RATING
DERATING FACTOR
ABOVE TA = 25
°
C
10.8 mW/
°
C
TA = 70
°
C
POWER RATING
TA = 85
°
C
POWER RATING
PT
1350 mW
864 mW
702 mW
DISSIPATION RATING TABLE 2 – Case Temperature
TC
≤
25
°
C
POWER RATING
ABOVE TC = 25
°
C
6579 mW
52.6 mW/
°
C
PACKAGE
DERATING FACTOR
TC = 70
°
C
POWER RATING
TC= 85
°
C
POWER RATING
PT
4212 mW
3423 mW
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