MAX14721-MAX14723 Reference Design Circuitry | Adjustable Power Limiter Application Circuit

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The MAX14721-MAX14723 is an adjustable power limiter that introduces the MAX14721-MAX14723 features, application range, reference design circuitry, and circuit analysis to help you reduce design time.

Introduction to the MAX14721-MAX14723:
Maxim's integrated MAX14721, MAX14722, and MAX14723 high-precision adjustable power limiters protect the system from overcurrent faults, forward overvoltages, and reverse voltage faults when used with an optional external p-channel MOSFET Protect downstream circuits from voltage faults up to ±60V. The MAX14721-MAX14723 also include an FET that integrates a low on-resistance of 31mΩ. During startup, for applications that use large storage capacitors on the input to downstream devices, the device can concentrate a large amount of capacitance on the output in continuous mode. In addition, the MAX14721-MAX14723 divides the current-limit mode into two phases, limiting the current to 1.5x and 2x of the design limit for a short period of time after startup. This allows a large amount of charge to be collected faster during startup. The MAX14721-MAX14723 also feature reverse current protection and thermal protection. The device operates over the -40°C temperature range of 125°C.

Features of the MAX14721-MAX14723:
Reliable high-power protection reduces system downtime wide input range: +5.5V to +58V
Thermal foldback current limit protection with negative input voltage tolerance as low as -60V with external pFET
Low on-resistance 76mΩ (typical)
Reverse current blocking protection with external pFET
Safer two-stage current limit by preventing FET overheating
1.0x startup current (MAX14721)
1.5x startup current (MAX14722)
2.0x startup current (MAX14723)
Designed for flexibility, reusability and reduced repetitive authentication. Adjustable overvoltage lockout and undervoltage lockout thresholds set forward current between 0.2A and 2A with ±15% accuracy over temperature Normal and high voltage enable inputs (EN and HVEN)
Protected external pFET gate drive

MAX14721-MAX14723 application:
Control and automation high power application man-machine interface industrial power system motion system driver

MAX14721-MAX14723 Reference Design Circuitry:

Figure 1 MAX14721-MAX14723 reference application circuit

MAX14721-MAX14723 Chinese data: Click to download the popular application circuit with schematic and source code. See: Appreciation immediately