DC1555C-B

Demonstration circuit DC1555C is intended to demonstrate the performance of the LTC4365 and LTC4365-1 undervoltage, overvoltage and reverse supply protection controllers. The LTC®4365/LTC4365-1 protect circuits from input voltages that may be too high, too low or negative. It operates by controlling the gates of two back-to-back connected MOSFETs to keep the output in a safe range. The OV and UV protection levels are adjusted by resistive dividers at the OV and UV pins. The LTC4365 and LTC4365-1 can withstand DC voltages between -40V and +60V and have a valid operating range of 2.5V to 34V. Regarding the supply protection parameters, the LTC4365 and LTC4365-1 are identical. The only differences are in the gate fault recovery delay time and the delay from turn-off to low-power operation. The DC1555C includes the controller, two back-to-back connected power MOSFETs, three jumpers and three LEDs to indicate the input and output voltages and the active-high FAULT pin signal.

• Board input voltage range from -30V to 30V
• Typical input supply undervoltage lockout of 2.2V (VIN rising)
• Input supply current of 10µA (active-high SHDN = 0V)/25µA (active-high SHDN = 2.5V)

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