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參數(shù)資料
| 型號： | UC3902DTRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | GREEN, SOIC-8 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 293K |
| 代理商： | UC3902DTRG4 |
UC2902
UC3902
SLUS232D DECEMBER 19, 2002 REVISED NOVEMBER 2008
7
www.ti.com
The share loop compensation capacitor, CC is calculated to produce the desired share loop unity gain crossover
frequency, fC. The share loop error amplifier’s transconductance, gM is nominally 4.5 ms. The values of the
resistors are already known. Typically, fC is set to at least one order of magnitude below the converter’s closed
loop bandwidth. The load share circuit is primarily intended to compensate for each converter’s initial output
voltage tolerance and temperature drift, not for differences in their transient response. The term APWR(fc) is the
gain of the power supply measured at the desired share loop crossover frequency, fC. This gain can be
measured by injecting the measurement signal between the positive output and the positive sense terminal of
the power supply.
Step 5.
R
C +
1
2
p
f
C
A resistor in series with CC is required to boost the phase margin of the load share loop. The zero is placed at
the load share loop crossover frequency, fC.
When the system is powered up, the converter with the highest output voltage tends to source the most current
and take control of the share bus. The other converters increase their output voltages until their output currents
are proportional to the share bus voltage minus 50 mV. The converter which in functioning as the master may
change due to warmup drift and differences in load and line transient response of each converter.
ADDITIONAL INFORMATION
Please refer to the following topic for additional application information.
1.
Application Note U163, (TI Literature No. SLUA128) The UC3902 Load Share Controller and Its
Performance in Distributed Power Systems by Laszlo Balogh
(6)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UC3902N | 功能描述:其他電源管理 LOAD SHARE CONTROLLER RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| UC3902N | 制造商:Texas Instruments 功能描述:LOAD SHARE CONTROLLER 3902 DIP8 |
| UC3902NG4 | 功能描述:其他電源管理 LOAD SHARE CONTROLLER RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| UC3903 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Quad Supply and Line Monitor |
| UC3903DW | 功能描述:監(jiān)控電路 Quad Supply and Line Monitor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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