DC1624A-B

DC1624A-B is a demonstration circuit featuring the LTC4225-2 dual Ideal diode and hot swap controller. DC1624A facilitates evaluation of LTC4225 performance in different operation modes such as supply ramp-up, power supply switchover, steady state, and overcurrent faults. Power supply switchover mode can be realized as either an ideal diode functionality or as a prioritizer functionality. The main components of the board are the LTC4225 controller, two MOSFETs operating as ideal diodes, two MOSFETs operating as Hot Swap devices, two power sense resistors, two jumpers for independently enabling each rail, four LEDs to indicate power good and fault conditions separately for each channel, and input voltage snubbers. The standard configuration (as DC1624A populated by default) places the ideal diode MOSFET ahead of the Hot Swap MOSFET. The board also has pads for an alternative configuration with the Hot Swap MOSFET located ahead of the ideal diode MOSFET.

• Input supply range from 2.9 to 18V
• 2.3V max internal VCC undervoltage lockout
• Operate with a 12V supply and 11.5A maximum current load
• 90mV max internal VCC undervoltage lockout hysteresis
• Ideal diode control: 40mV max ΔVFWD(REG)
• Ideal diode control:14V max ΔVDGATE at ΔVFWD = 0.1V, IN less than 7V
• Hot swap control: 52.5mV max ΔVSENSE(CB)
• Hot swap control: 13µA max IHGATE(UP) at gate drive On, HGATE = 0V
• Input/output pin: : 1.26V VON(TH) max at on rising