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參數(shù)資料
| 型號(hào)： | TPS9103PW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | POWER SUPPLY FOR GaAs POWER AMPLIFIERS |
| 中文描述： | 電源供應(yīng)器的GaAs功率放大器 |
| 文件頁數(shù)： | 17/22頁 |
| 文件大小： | 341K |
| 代理商： | TPS9103PW |
TPS9103
POWER SUPPLY FOR GaAs POWER AMPLIFIERS
SLVS131A – OCTOBER 1995 – REVISED JULY 1996
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
capacitors of the internal inverting charge pump (see Figure 15)
This charge pump inverts the voltage at V
DD
and provides a negative output voltage at GATE_BIAS.
Charge
Pump
GATE_BIAS
C6
C +
C –
C2
TPS9103
+
Figure 15. Internal Inverting Charge Pump
The output capacitor C6 limits the voltage ripple at GATE_BIAS:
VRipple
IO(GATE_BIAS)
C6
f
With a capacitor C6 of 4.7
μ
F and an output current of 10 mA, the voltage ripple at GATE_BIAS is 42 mV.
The capacitor C2 can be calculated using an equivalent resistance method:
Requivalent
1
C2
f
Using 0.33
μ
F for C2, the equivalent resistance is:
Requivalent
1
0.33
F
50 kHz
60.6
Add the internal resistance of the switches (35
) to get a total resistance seen by the current:
RTOTAL
60
35
95
With a total resistance of 95
and 10 mA flowing through it, a voltage drop of 0.95 V occurs. With 5 V on V
DD
,
the output is –4.05 V with a 42 mV ripple.
The capacitors should have a low equivalent series resistance (ESR) to maintain low ripple and low noise.
Careful layout is required. In most instances it is advisable to add a small decoupling capacitor C5 close to the
GATE_BIAS. An additional 0.1-
μ
F capacitor at other locations may be necessary if the power amplifier is located
away from the TPS9103.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS9103PWR | 制造商:Rochester Electronics LLC 功能描述:POWER SUPPLY FOR GAAS POWER AMPLIFIERS - Bulk |
| TPS9103Y | 制造商:TI 制造商全稱:Texas Instruments 功能描述:POWER SUPPLY FOR GaAs POWER AMPLIFIERS |
| TPS9104 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM |
| TPS9104IPT | 制造商:Rochester Electronics LLC 功能描述:LINBICMOS CELLULAR POWER SUPPLY/AUDIO SY - Tape and Reel |
| TPS9104IPTR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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