DC1886B-B

DC1886B-B demonstration circuit features the LTC4232IDHC-1, 5A integrated Hot Swap™ controller. The LTC®4232-1 is an integrated solution for Hot Swap applications that allows a board to be safely inserted and removed from a live backplane. The part integrates a Hot Swap controller, power MOSFET and current sense resistor in a single package for small form factor applications. The LTC4232-1 provides separate inrush current control and a 10% accurate 5A current limit with foldback current limiting. The current limit threshold can be adjusted dynamically using an external pin. Additional features include a current monitor output that amplifies the sense resistor voltage for ground referenced current sensing and a MOSFET temperature monitor output. Thermal limit, overvoltage, undervoltage and power good monitoring are also provided.

• Board input supply range from 9.2 to 15.1V at Min Is UV, Max Is OV
• GATE Pin turn-on ramp rate: 1.7 to 3.5V/ms at LTC4232-1 with 10nF GATE capacitor
• 16ms debounce time
• Auto-retry turn-on delay (Internal): 8 to 24ms
• Timer period for ADJUSTABLE option: 0.95 to 1.68ms
• Demo board configured for 12V application
• Changing a few passive components, 2.9V to 15V applications can be easily evaluated