MCZ34653 Datasheet | Freescale Semiconductor

.. Freescale Semiconductor Advance Information Document Number: MC34653 Rev. 8.0, 2/2007 1.0 A Negative Voltage Hot Swap Controller The 34653 is a highly integrated - 48 V hot swap controller with an internal Power MOSFET. It provides the means to safely install and remove boards from live - 48 V backplanes without having to power down the entire system. It regulates the inrush current, from the supply to the load’s filter capacitor, to a user-programmable limit, allowing the system to safely stabilize. A disable function allows the user to disable the 34653 manually or through a microprocessor and safely disconnect the load from the main power line. The 34653 has active high and active low power good output signals that can be used to directly enable a power module load. Undervoltage and overvoltage detection circuitry monitors the input voltage to check that it is within its operating range. A start-up delay timer ensures that it is safe to turn on the Power MOSFET and charge the load capacitor. A two-level current limit approach to controlling the inrush current and switching on the load limits the peak power dissipation in the Power MOSFET. Both current limits are user programmable. Features - Integrated Power MOSFET and Control IC in a Small Outline Package - Input Voltage Operation Range from - 39 V to - 74 V - Programmable Overcurrent Limit with Auto Retry - Programmable Charging Current Limit Independent of Load Capacitor - Start-Up and Retry Delay Timer - Overvoltage and Undervoltage Detection - Active High and Low Power Good Output Signals - Thermal Shutdown - Pb-Free Packaging Designated by Suffix Code EF HOT SWAP EF SUFFIX (Pb-Free) 98ASB42564B 8-PIN SOICN ORDERING INFORMATION Device MCZ34653EF/ R2 MC34653EF/ R2 Temperature Range (TA) - 40°C to 85°C Package 8 SOICN DISABLE PG GND System Power Supply (Backplane) -48 V VIN VPWR PG VOUT Load Application Dependent Optional External ponents ILIM ICHG Optional...