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UC1901 Datasheet PDF

Part Series:
UC1901 Series
Category:
-
Description:
The UC1901 family is designed to solve many of the problems associated with closing a feedback control loop across a voltage isolation boundary
Updated Time: 2023/09/27 09:01:39 (UTC + 8)

UC1901 Datasheet PDF -

12 Pages
TI
The UC1901 family is designed to solve many of the problems associated with closing a feedback control loop across a voltage isolation boundary

UC1901 - TI Specifications

TYPE
DESCRIPTION
Case/Package
CDIP-14
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UC1901 - TI Function Overview

The UC1901 family is designed to solve many of the problems associated 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 error signal to be coupled with a small RF transformer or capacitor.
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 switching frequency of a SMPS.
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. 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.
An Amplitude-Modulation System for Transformer Coupling an Isolated Feedback Error Signal
Low-Cost Alternative to Optical Couplers
Internal 1% Reference and Error Amplifier
Internal Carrier Oscillator Usable to 5MHz
Modulator Synchronizable to an External Clock
Loop Status Monitor
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