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KEPCO KFD 6-25-60W Operator's Manual

6 volts output 36 to 72 vdc input
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OPE RATOR'S MANUAL
KEPCO INC.
An ISO 9001 Company.
IMPORTANT NOTES:
1)
This manual is valid for the following Model and associated serial numbers:
MODEL
2)
A Change Page may be included at the end of the manual. All applicable changes and
revision number changes are documented with reference to the equipment serial num-
bers. Before using this Instruction Manual, check your equipment serial number to identify
your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-
mentation Office in New York, (718) 461-7000, requesting the correct revision for your par-
ticular model and serial number.
3)
The contents of this manual are protected by copyright. Reproduction of any part can be
made only with the specific written permission of Kepco, Inc.
Data subject to change without notice.
©1995, KEPCO, INC
P/N 243-0814
KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11352 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102
KFD 150W
POWER SUPPLY
6 VOLTS OUTPUT
36 TO 72 VDC INPUT
KFD 6-25-60W
POWER SUPPLY
ORDER NO.
SERIAL NO.
email: hq@kepcopower.com ! World Wide Web: http://www.kepcopower.com
MODEL
REV. NO.
REV. NO.
KEPCO
THE POWER SUPPLIER™
®

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Summary of Contents for KEPCO KFD 6-25-60W

  • Page 1 Data subject to change without notice. KEPCO ® ©1995, KEPCO, INC THE POWER SUPPLIER™ P/N 243-0814 KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11352 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102 email: hq@kepcopower.com ! World Wide Web: http://www.kepcopower.com...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION PAGE Introduction:............................. 1 Description: ............................. 1 Absolute Maximum Ratings:........................1 Input Specifications ..........................1 Output Specifications ..........................2 General Specifications ..........................3 Feature Specifications ..........................4 Output Overvoltage Clamp........................4 Current Limit ............................4 10.0 Remote ON/OFF ............................. 4 11.0 Output Voltage Reversal .........................
  • Page 4 Trim Up to Increase Voltage Setpoint ......................... 17 Heat Sinks for Vertical Orientation - Kepco Model KFD-02 and the Kepco Model KFD-04 ....18 Heat sinks for Horizontal Orientation - Kepco Model KFD-01 and the Kepco Model KFD-03....19 Forced Convection Derating, Power Dissipation Versus Local Ambient Temperature ......20 Heat Sink Derating Curves, Natural Convection, Fins Oriented Along the Width ........

  • Page 5: Introduction

    2.0 DESCRIPTION: The Kepco KFD 150 Watt DC to DC Converter has a nominal 36-72 Vdc input and a 5 Volt DC output nom- inal voltage. The DC to DC Converter is a low-dissipative stabilizer, using pulse-width modulation to control the output.

  • Page 6: Output Specifications

    5.0 OUTPUT SPECIFICATIONS (SEE TABLES 2, 3, AND 4) TABLE 2. OUTPUT SPECIFICATIONS FOR THE KFD UNIT Parameter Description Output Voltage Nominal Output Current Nominal Output Power Maximum 150W Ripple 35mV RMS max. Noise, 5Hz to 20Mhz 100 mV p-p max. Output Current Minimum 1.0A Output Current Maximum...

  • Page 7: General Specifications

    TABLE 4. OUTPUT SPECIFICATIONS Specification Parameter UNIT Output Voltage (Over All Operating Input Voltage, 4.75 6.25 Resistive Load, And Temperature Conditions) Output Voltage Setpoint (V =48 volts, I max, T A =25°C. Unit Operating In Parallel Or Parallel Pin Shorted To Sense (-) Pin (See Figure 3) Parallel Pin Open 6.25...

  • Page 8: Feature Specifications

    7.0 FEATURE SPECIFICATIONS (SEE TABLES 6 AND 7) TABLE 6. REMOTE ON/OFF Specification State Unit ON/.OFF CURRENT Logic Low ON/OFF VOLTAGE Logic Low Logic High I ON/OFF =0 Open Collector Switch Specifications Leakage Current During Logic High µΑ (V ON/OFF =18V) Output Low Voltage During Logic Low I ON/OFF =1mA Turn On Time (I o =80%I omax.

  • Page 9: Output Voltage Reversal

    A jumper across the ON/OFF terminal and the -V terminal can be used to override the Remote ON/OFF (see Figure 4). Either a user-supplied switch or the override jumper should be wired into the circuit via indi- vidual PWB current paths not common to the -V current path.

  • Page 10: Remote Sense

    15.0 REMOTE SENSE Remote Sense pins are provided to minimize the effects of distribution losses that come about from regu- lating the output voltage at the remote sense terminals. The KFD output voltage specifications refer to measurements taken at the Remote Sense terminals during parallel operation, or with the parallel pin shorted to the Sense (-) pin.

  • Page 11: Thermal Considerations

    18.0 THERMAL CONSIDERATIONS To ensure reliable operation of the KFD unit, thermal management is important. Heat dissipated by the unit is conducted to the case, and subsequently convected to the surrounding air. Convection cooling can be improved by mounting a heat sink to the top of the unit. Six threaded holes, No. 4-40 [0.18 inches deep (46mm)] are provided for this purpose.

  • Page 12: Use Of Graphs

    (case temperature)=95°C for the KFD c,max 150W D.C. to D.C. Converter (the KFD 6-25-60W) without a heat sink, consider the following: The KFD DC to DC Converter (150W) operates at Io=30 Amps and T =50° without a heat sink. The power dissipated by the unit can be determined from the difference between the input power and output power and the efficiency of the converter.

  • Page 13: Detailed Thermal Model

    using a one half inch fin heat sink oriented along the length. Consider the following: For an air flow of 150 ft./min. using the same D.C. to D.C. Converter as in the last example and with a 0.5 inch heat sink with fins oriented along the length, refer to the thermal resistance plot. From Figure 14 the thermal resistance is 1.3°C/W.

  • Page 14: General Features

    data for additional data. 20.0 GENERAL FEATURES Among the general features of the KFD D.C. to D.C. Converter are the ones listed below: • Low Profile: 0.5 inch • Internal EMI Filter • Complete Input And Output Filtering • Input To Output Isolation •...

  • Page 15: Test Setup For Output Voltage And Efficiency Measurements For The Dc To Dc Converter

    NOTE: WHEN PLACING THE POWER MODULE INTO A PRINTED CIRCUIT BOARD SOCKET, USE KELVIN CONNECTIONS AT THE POWER MODULE INPUT AND OUTPUT TERMINALS TO AVOID MEASUREMENT ERRORS DUE TO SOCKET CONTACT RESISTANCE. FIGURE 1 TEST SETUP FOR OUTPUT VOLTAGE AND EFFICIENCY MEASUREMENTS FOR THE DC TO DC CONVERTER KFD 6-25-60/060801...

  • Page 16: Test Setup For The Input Reflected Ripple For The Single Output Kfd Dc To Dc Converter

    NOTE: AT THE INPUT THE REFLECTED RIPPLE IS MEASURED WITH A SIMU- LATED SOURCE IMPEDANCE OF 12µH; THE CAPACITOR, C , OFFSETS POSSIBLE BATTERY IMPEDANCE. CURRENT IS MEASURED AT THE INPUT OF THE POWER MODULE. FIGURE 2 TEST SETUP FOR THE INPUT REFLECTED RIPPLE FOR THE SINGLE OUTPUT KFD DC TO DC CONVERTER.

  • Page 17: Mechanical Outline Drawing Of The Single Output Kfd Dc To Dc Converter

    FIGURE 3 MECHANICAL OUTLINE DRAWING OF THE SINGLE OUT- PUT KFD DC TO DC CONVERTER KFD 6-25-60/060801...

  • Page 18: Remote On/Off Wiring Configuration For The Single Output Kfd Dc To Dc Converter

    FIGURE 4 REMOTE ON/OFF WIRING CONFIGURATION FOR THE SINGLE OUTPUT KFD DC TO DC CONVERTER 3040491 KFD 6-25-60/060801...

  • Page 19: Wiring Configuration For Redundant Parallel Operation Of The Kfd Dc To Dc Converter

    FIGURE 5 WIRING CONFIGURATION FOR REDUNDANT PARALLEL OPERATION OF THE KFD DC TO DC CONVERTER KFD 6-25-60/060801...

  • Page 20: Circuit Configuration For Single Kfd Dc To Dc Converter Remote Sense Operation

    FIGURE 6 CIRCUIT CONFIGURATION FOR SINGLE KFD DC TO DC CONVERTER REMOTE SENSE OPERATION KFD 6-25-60/060801...
  • Page 21 FIGURE 7 (TOP) KFD DC TO DC CONVERTER CIRCUIT CONFIGURA- TION FOR R , TO DECREASE VOLTAGE SETPOINT Trim Down FIGURE 8 (BOTTOM) KFD DC TO DC CONVERTER CIRCUIT CONFIG- URATION FOR R , TO INCREASE VOLTAGE SETPOINT Trim Up KFD 6-25-60/060801...

  • Page 22: Heat Sinks For Vertical Orientation - Kepco Model Kfd-02 And The Kepco Model Kfd-04

    FIGURE 9 HEAT SINKS FOR VERTICAL ORIENTATION - KEPCO MODEL KFD-02 AND THE KEPCO MODEL KFD-04 KFD 6-25-60/060801...

  • Page 23: Heat Sinks For Horizontal Orientation - Kepco Model Kfd-01 And The Kepco Model Kfd-03

    FIGURE 10 HEAT SINKS FOR HORIZONTAL ORIENTATION - KEPCO MODEL KFD-01 AND THE KEPCO MODEL KFD-03 KFD 6-25-60/060801...

  • Page 24: Forced Convection Derating, Power Dissipation Versus Local Ambient Temperature

    NOTE: THE GRAPHS ARE PLOTTED AS A FUNCTION OF THE AIR FLOW WITHOUT THE USE OF A HEAT SINK (FOR THE KFD POWER MODULE COOLING) FIGURE 11 FORCED CONVECTION DERATING, POWER DISSIPATION VERSUS LOCAL AMBIENT TEMPERATURE KFD 6-25-60/060801...

  • Page 25: Heat Sink Derating Curves, Natural Convection, Fins Oriented Along The Width

    FIGURE 12 HEAT SINK DERATING CURVES, NATURAL CONVECTION, FINS ORIENTED ALONG THE WIDTH KFD 6-25-60/060801...

  • Page 26: Heat Sink Derating Curves, Natural Convection, Fins Oriented Along The Length

    FIGURE 13 HEAT SINK DERATING CURVES, NATURAL CONVECTION, FINS ORIENTED ALONG THE LENGTH KFD 6-25-60/060801...

  • Page 27: Heat Sink Resistance Curves For Fins Oriented Along Vertical And Horizontal Directions

    FIGURE 14 HEAT SINK RESISTANCE CURVES FOR FINS ORIENTED ALONG VERTICAL AND HORIZONTAL DIRECTIONS KFD 6-25-60/060801...

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