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MAX14721 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX14721 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 20 page  General Description The MAX14721–MAX14723 adjustable overvoltage, undervoltage, and overcurrent protection devices guard systems against overcurrent faults in addition to positive overvoltage and reverse-voltage faults. When used with an optional external p-channel MOSFET, the devices also protect downstream circuitry from voltage faults up to +60V, -60V (for -60V external pFET rating). The devices feature a low, 76mΩ, on-resistance integrated FET. During startup, 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 MAX14721–MAX14723 feature a dual-stage, current-limit mode in which the current is continuously limited to 1x, 1.5x, and 2x the programmed limit, respectively, for a short time after startup. This enables faster charging of large loads during startup. The MAX14721–MAX14723 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5mm x 5mm) TQFN package and operate over a -40°C to 125°C temperature range. Applications Industrial Power Systems Control and Automation Motion System Drives Human Machine Interfaces High-Power Applications Benefits and Features ● Robust, High-Power Protection Reduces System Downtime • Wide Input Supply Range: +5.5V to +60V • Programmable Input Supply Overvoltage Setting Up to 40V • Thermal Foldback Current-Limit Protection • Negative Input Tolerance to -60V (for -60V External pFET Rating) • Low 76mΩ (typ) RON • Reverse Current-Blocking Protection with External pFET ● Enables Safer Startup By Preventing Overheating of FETs • Dual-Stage Current Limiting • 1.0x Startup Current (MAX14721) • 1.5x Startup Current (MAX14722) • 2.0x Startup Current (MAX14723) ● Flexible Design Enables Reuse and Less Requalification • Adjustable OVLO and UVLO Thresholds • Programmable Forward Current Limit From 0.2A to 2A with ±15% Accuracy Over Full Temperature Range • Normal and High-Voltage Enable Inputs (EN and HVEN) • Protected External pFET Gate Drive ● Saves Board Space and Reduces External BOM Count • 20-Pin, 5mm x 5mm TQFN Package • Integrated nFET Ordering Information appears at end of data sheet. 19-7370; Rev 3; 11/17 MAX14721/ MAX14722/ MAX14723 High-Accuracy, Adjustable Power Limiter Typical Application Circuit UVLO OVLO CLTS1 HVEN 10kΩ PROTECTED POWER CIN COUT HVEN GND POWER *R1, R2, R3, AND R4 ARE ONLY REQURED FOR ADJUSTABLE UVLO/ OVLO FUNCTIONALITY. OTHERWISE, TIE THE PIN TO GND TO USE THE INTERNAL, PREPROGRAMMED THRESHOLD. 220kΩ GP CLTS2 x R4* VIN R1* R2* VIN GND R3* VIN CIN_C IN IN IN OUT OUT OUT SETI RIPEN FLAG EN SYSTEM CONTROLLER ADC SYSTEM INPUT ENB FAULT EN MAX14721– MAX14723 |
Similar Part No. - MAX14721 |
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Similar Description - MAX14721 |
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