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參數資料
| 型號： | UC3910D |
| 英文描述： | LNB Supply and control voltage regulator |
| 中文描述： | D / A轉換 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 247K |
| 代理商： | UC3910D |
3/97
BLOCK DIAGRAM
Precision 5V Reference
4-Bit Digital-to-Analog (DAC)
Converter
0.5% DAC/Reference Combined
Error
Programmable Undervoltage and
Overvoltage Fault Windows
Overvoltage Comparator with
Complementary SCR Driver and
Open Collector Outputs
Undervoltage Lockout
The UC3910 is a complete precision reference and voltage monitor cir-
cuit for Intel Pentium Pro and other high-end microprocessor power
supplies. It is designed for use in conjunction with the UC3886 PWM. The
UC3910 together with the UC3886 converts 5VDC to an adjustable out-
put ranging from 2.0VDC to 3.5VDC in 100mV steps with 1% DC system
accuracy.
The UC3910 utilizes thin film resistors to ensure high accuracy and sta-
bility of its precision circuits. The chip includes a precision 5V voltage ref-
erence which is capable of sourcing 10mA to external circuitry. The
output voltage of the DAC is derived from this reference, and the accu-
racy of the DAC/reference combination is 0.5%. Programmable window
comparators monitor the supply voltage to indicate that it is within ac-
ceptable limits. The window is programmed as a percentage centered
around the DAC output. An overvoltage protection comparator is set at a
percentage 2 times larger than the programmed lower overvoltage level
and drives an external SCR as well as provides an open collector output.
Undervoltage lockout protection assures the correct logic states at the
outputs during power-up and power-down.
4-Bit DAC and Voltage Monitor
FEATURES
DESCRIPTION
UC1910
UC2910
UC3910
UDG-95097-3
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相關代理商/技術參數 |
參數描述 |
|---|---|
| UC3910DTR | 功能描述:基準電壓& 基準電流 4-Bit DAC Voltage Monitor RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC3910DTRG4 | 功能描述:基準電壓& 基準電流 4 Bit DAC Voltage Monitor RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC3910N | 功能描述:基準電壓& 基準電流 4-Bit DAC Voltage Monitor RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC3910NG4 | 功能描述:基準電壓& 基準電流 4-Bit DAC Voltage Monitor RoHS:否 制造商:STMicroelectronics 產品:Voltage References 拓撲結構:Shunt References 參考類型:Programmable 輸出電壓:1.24 V to 18 V 初始準確度:0.25 % 平均溫度系數（典型值）:100 PPM / C 串聯 VREF - 輸入電壓（最大值）: 串聯 VREF - 輸入電壓（最小值）: 分流電流（最大值）:60 mA 最大工作溫度:+ 125 C 封裝 / 箱體:SOT-23-3L 封裝:Reel |
| UC3914 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:5V to 35V Hot Swap Power Manager |
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