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MC34652 Datenblatt(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC34652 Datenblatt(HTML) 1 Page - Freescale Semiconductor, Inc |
1 / 25 page Document order number: MC34652 Rev 6.0, 02/2006 Freescale Semiconductor Technical Data * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2006. All rights reserved. 2.0 A Negative Voltage Hot Swap Controller with Enhanced Programmability The 34652 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 34652 manually or through a microprocessor and safely disconnect the load from the main power line. The 34652 has active high and active low power good output signals that can be used to directly enable a power module load. Programmable under- and overvoltage detection circuitry monitors the input voltage to check that it is within its operating range. A programmable 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 -15 V to -80 V • Programmable Overcurrent Limit with Auto Retry • Programmable Charging Current Limit Independent of Load Capacitor • Programmable Start-Up and Retry Delay Timer • Programmable Overvoltage and Undervoltage Detection • Active High and Low Power Good Output Signals • Thermal Shutdown • Pb-Free Packaging Designated by Suffix Code EF Figure 1. 34652 Simplified Application Diagram 2.0 A NEGATIVE VOLTAGE HOT SWAP CONTROLLER WITH ENHANCED PROGRAMMABILITY 34652 ORDERING INFORMATION Device Temperature Range (TA) Package MC34652EF/R2 -40°C to 85°C 16 SOICN SCALE 2:1 EF SUFFIX (PB-Free) 98ASB42566B 16-TERMINAL SOICN 34652 DISABLE VPWR UV OV ICHG ILIM VIN VOUT PG PG TIMER GND -48 V System Power Supply (Backplane) Optional External Components Optional External Components Load Application Dependent |
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