Texas Instruments UC3543
The monolithic integrated circuits contain all the functions necessary to monitor and control the output of a sophisticated power supply system. Both over- and under-voltage sensing circuits can be externally programmed for minimum time duration of fault before triggering.| Part No. | UC3543 |
|---|---|
| Datasheet | UC3543 Download |
| Manufacturer |  Texas Instruments |
| Description | Power Supply Supervisory Circuit |
| Buy | Stock & Price |
FEATURES
● Includes Over-Voltage, Under-Voltage, and Current Sensing Circuits● Internal 1% Accurate Reference
● Programmable Time Delays
● SCR “Crowbar” Drive of 300 mA
● Remote Activation Capability
● Optional Over-Voltage Latch
● Uncommitted Comparator Inputs for Low Voltage Sensing (UC1544 Series Only)
DESCRIPTION
Over-voltage (O.V.) sensing with provision to trigger an external SCR “crowbar” shutdown; an undervoltage (U.V.) circuit which can be used to monitor either the output or to sample the input line voltage; and a third op amp/comparator usable for current sensing (C.L.) are all included in this device, together with an independent, accurate reference generator. All functions contain open collector outputs which can be used independently or wire-or’ed together, and although the SCR trigger is directly connected only to the over-voltage sensing circuit, it may be optionally activated by any of the other outputs, or from an external signal. The O.V. circuit also includes an optional latch and external reset capability.
