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34653

Freescale Semiconductor
Part Number 34653
Manufacturer Freescale Semiconductor
Description Negative Voltage Hot Swap Controller
Published Mar 1, 2007
Detailed Description www.DataSheet4U.com Freescale Semiconductor Advance Information Document Number: MC34653 Rev. 8.0, 2/2007 1.0 A Negat...
Datasheet PDF File 34653 PDF File

34653
34653

Overview
www.
DataSheet4U.
com 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 34653 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 34653 DISABLE PG GND System Power Supply (Backplane) -48 V VIN VPWR PG VOUT Load Application Dependent Optional External Components ILIM ICHG Optional Extern...


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