DESCRIPTION
The SMH4812 is designed to control hot swapping of plugin cards operating from a single supply, which can have an output range from 20V to 500V. The SMH4812 hot-swap controller provides under-voltage and over-voltage monitoring of the host power supply, it drives an external power MOSFET switch that connects the supply to the load, and it protects against over-current conditions that might disrupt the host supply.

FEATURES
● Soft Starts Main Power Supply on Card Insertion or System Power Up
● Senses Card Insertion via Short Pins or Ejector Switches
● Master Enable to Allow System Control of Power Up or Down
    ♦ Can be used as a Temperature Sense Input
● Programmable Independent Controls of a DC/DC Converter
    ♦ Not Enabled until Host Supply Fully Soft Started
    ♦ Programmable Time Delay
    ♦ Available Input to hold off Dependant Enables until Conditions are Satisfied
● Highly Programmable Circuit Breaker
    ♦ Programmable Quick-TripTM Values
    ♦ Programmable Current Limiting
    ♦ Programmable Duty Cycle Times
    ♦ Programmable Over-current Filter
● Programmable Host Voltage Fault Monitoring
    ♦ Programmable Under-Voltage Hysteresis
    ♦ Programmable UV/OV Voltage Filter
    ♦ Programmable Fault Mode: Latched or Duty Cycle
● Programmable Forced Shutdown Timer
● 2.5V and 5.0V Reference Outputs
    ♦ Eliminates the Need for Other Primary Voltages
    ♦ Easy Expansion of External Monitor Functions
● Supply Range ±20VDC to >±500VDC