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Analog Devices MAX17614 Ideal Diode/Power Source Selectors provide adjustable protection boundaries for systems against positive and negative input faults up to +60V and -65V and output load current up to 3A. The MAX17614 includes two internal nFETs connected in series with a low cumulative RON of 130mΩ (typical). The nFETs implement an ideal diode function to supply reverse input voltage and reverse current protection with improved system efficiency. Input undervoltage protection can be programmed between 4.5V and 59V, while the overvoltage protection can be independently programmed between 5.5V and 60V. The MAX17614 has an internal default UVLO rising threshold set at 4.2V (typical).
The ADI MAX17614 ideal diode/power source selector facilitates the EN pin by a central supervisory system to enable or disable the device. This function produces a switch operation to turn on or off power delivery to connected loads.
The current via the device is limited by setting a current limit programmed by a resistor connected from SETI to GND. The current limit can be programmed between 0.15A to 3A. When the MAX17614 current reaches or surpasses the set current limit, the internal nFET Q2 limits the current to the set limit. The device presents three current-limit modes: Autoretry, Continuous, and Latch-off. The SETI pin also shows a voltage regarding GND, which is proportional to the device current under normal operation. An analog-to-digital converter might read the voltage on the SETI pin or ADC in a monitoring system to record instantaneous device current.
The MAX17614 selector includes FLAG and UVOV communication signals to demonstrate different operational and fault signals. The communication signal pins are open drain and require external pullup resistors to suitable system interface voltage. The MAX17614 has internal thermal shutdown protection against extreme power dissipation.
