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UC1901L883B

更新时间： 2024-09-30 12:01:59

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
12页	599K
描述
Isolated Feedback Generator

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UC1901L883B 数据手册

UC1901

UC2901

UC3901

Isolated Feedback Generator

FEATURES

DESCRIPTION

• An Amplitude-Modulation System for

Transformer Coupling an Isolated

Feedback Error Signal

The UC1901 family is designed to solve many of the problems associ-

ated with closing a feedback control loop across a voltage isolation

boundary. As a stable and reliable alternative to an optical coupler, these

devices feature an amplitude modulation system which allows a loop er-

ror signal to be coupled with a small RF transformer or capacitor.

• Low-Cost Alternative to Optical

Couplers

The programmable, high-frequency oscillator within the UC1901 series

permits the use of smaller, less expensive transformers which can readily

be built to meet the isolation requirements of today's line-operated power

systems. As an alternative to RF operation, the external clock input to

these devices allows synchronization to a system clock or to the switch-

ing frequency of a SMPS.

• Internal 1% Reference and Error

Amplifier

• Internal Carrier Oscillator Usable to

5MHz

• Modulator Synchronizable to an

External Clock

An additional feature is a status monitoring circuit which provides an active-

low output when the sensed error voltage is within 10% of the reference.

• Loop Status Monitor

The DRIVERA output, DRIVERB output, and STATUS output are disabled

until the input supply has reached a sufficient level to allow proper operation

of the device.

Since these devices can also be used as a DC driver for optical couplers,

the benefits of 4.5 to 40V supply operation, a 1% accurate reference, and a

high gain general purpose amplifier offer advantages even though an AC

system may not be desired.

UC1901 SIMPLIFIED SCHEMATICNovember S

UDG-98080

SLUS279A - November 1998 - Revised January 2010

12 3 4 5 6 7...12

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UC1901L883B 替代型号

型号	品牌	替代类型	描述	数据表
5962-89441012A	TI	类似代替	Isolated Feedback Generator
UC1901L	TI	类似代替	Isolated Feedback Generator
UC3901N	TI	功能相似	Isolated Feedback Generator

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