Datasheet > UC2910N

UC2910N

更新时间： 2024-11-24 23:38:55

品牌	Logo	应用领域
其他 - ETC		转换器
页数	文件大小	规格书
6页	248K
描述
D/A CONVERTER

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中文翻译

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数据手册

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UC2910N 数据手册

UC1910

UC2910

UC3910

4-Bit DAC and Voltage Monitor

FEATURES

DESCRIPTION

•

Precision 5V Reference

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.

•

4-Bit Digital-to-Analog (DAC)

Converter

•

0.5% DAC/Reference Combined

Error

Programmable Undervoltage and

Overvoltage Fault Windows

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.

Overvoltage Comparator with

Complementary SCR Driver and

Open Collector Outputs

•

Undervoltage Lockout

BLOCK DIAGRAM

UDG-95097-3

3/97

12 3 4 5 6

中文翻译

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