High-accuracy adjustable power limiters protect systems from various fault conditions

Maxim's MAX14692-MAX14693 high-accuracy adjustable power limiters are now available from Mouser stock. The adjustable over-voltage, under-voltage and over-current protection devices guard systems against over-current faults in addition to positive over-voltage and reverse-voltage faults. Typical applications that can benefit from the devices include industrial power systems, control and automation, motion system drives, HMIs and various high-power applications. When used with an optional external p-channel MOSFET, the devices also protect downstream circuitry from voltage faults up to ±60V. The devices feature a low, 31mO, on-resistance integrated FET. During start-up, the devices are designed to charge large capacitances on the output in a continuous mode for applications where large reservoir capacitors are used on the inputs to downstream devices. Additionally, the devices feature a dual-stage, current-limit mode in which the current is continuously limited to 1.5x or 2x the programmed limit, respectively, for a short time after start-up. This enables faster charging of large loads during startup.