Microchip SG3548N

Источник питания, контроллер4,5 В ~ 40 В4,8 мА

Overview

The SG1548 is an integrated circuit capable of monitoring up to four positive DC supply voltages simultaneously for overvoltage and undervoltage fault conditions. An on-chip inverting op amp also allows monitoring one negative DC voltage. The fault tolerance window is accurately programmable from ±5% to ±40% using a simple divider network on the 2.5V reference. A single external capacitor sets the fault indication delay, eliminating false outputs due to switching noise, logic transition current spikes, and short-term AC line interruptions. An additional comparator referenced to 2.5V allows the AC line to be monitored for undervoltage conditions or for generation of a line clock. The comparator can also be used for programmable undervoltage lockout in a switching power supply. Uncommitted collector and emitter outputs permit both inverting and non-inverting operation. External availability of the precision 2.5V reference and open-collector logic outputs permit expansion to monitor additional voltage using available open-collector quad comparators.

Features

Applications

• Power distribution systems of infant care room
• Power distribution systems of ICU
• Power distribution systems of CCU
• emergency room
• Medical-specific isolation transformer
• Medical-specific insulation monitor
• Transformer load monitoring equipment
• External alarm
• Display equipment
• DC stabilized power supply module