DC1354B-C

DC1354B-C demonstration circuit features the LT®1641-1 positive high voltage hot swap controller. The board facilitates measurement of transient conditions, steady state operation with different loads, and fault conditions. The controller responds to fault conditions such as input undervoltage(UV), output power good (PWRGD) fault, and overcurrent and response can be verified by the output voltage (VOUT) LED state and PWRGD pin signal. The LT1641-1 latch off if MOSFET shuts off under overcurrent conditions. The DC1354B contains one hot swap controller, power MOSFET, current sense resistor, enable circuit, input voltage clamp, gate protection circuit, resistive output voltage divider for feedback signal, and three LEDs to indicate the presence of input and output voltages and power good condition.

• Operating voltage range from 9V to 80V
• VCC undervoltage lockout range from 7.5V to 8.8V
• Undervoltage threshold range from 1.280 to 1.345V (LT1641, ON pin voltage low to high transition)
• GATE pin pull-up current range from 5µA to 20µA (LT1641)
• GATE pin pull-down current range from 35mA to 100mA (LT1641)