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Manual National Instruments LM3647

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  • National Instruments LM3647 - page 1

    LM3647 Reference Design User’s Manual GENERAL DESCRIPTION The LM3647 is a charge controller for Nickel-Cadmium (Ni-Cd), Nickel-Metal Hydride (Ni-MH) or Lithium-Ion (Li-Ion) batteries. The device uses a pulsed-current charging or a constant-current charging technique. The device can also be configured to discharge before charging. Throughout the c ...

  • National Instruments LM3647 - page 2

    Charge Current The charge settings for LM3647 current control are shown below . If the external LM317 is used to control the charge current then the jumpers J9, J10 and J13 have no relevance, when using LM317 regulation mode, this jumper must be placed in either position. If external (LM317) regulation is used then set jumper J7 to position ″ slo ...

  • National Instruments LM3647 - page 3

    and the charge process will restart. This occurs only with batteries that are already fully charged, and consequently should not be recharged. If the battery voltage has not reached the Li-Ion battery qualification voltage (CEL-pin > 1.2V) within 1 minute of the Qualification Phase, the battery is considered to be defective, and the charger goes ...

  • National Instruments LM3647 - page 4

    The actual timeouts (with RCIN @ 2.5 MHz) is: Phase Timeout Fast Charge ∼ 330 Minutes Topping Charge ∼ 80 Minutes EXAMPLE 2: The actual timeouts (with RCIN @ 2.5 MHz) is: Phase Timeout Fast Charge Constant Current − 130 Minutes Topping Charge Constant Voltage − 190 Minutes 1.2.2.4 Setting The Charge Current The charge-current is selected by ...

  • National Instruments LM3647 - page 5

    • For Li-Ion: The voltage divider network for Li-Ion is very important. If the battery voltage is scaled too low , the battery will not attain its full capacity when charged, and if scaled too high, the battery may become damaged. Never exceed the recommended maximum voltage or current for a Li-Ion battery! The dimensioning is done in the followi ...

  • National Instruments LM3647 - page 6

    2.0 APPLICA TION INFORMA TION 2.1 T ypical Example 2.1.1 Ni-Cd/Ni-MH Set To: SEL1 SEL2 SEL3 V CC No Discharge before Charge Ni-MH Fast-PWM (LM3647 has current feedback) Hi-Z Discharge before Charge NA NA GND Maintenance Charge Only Ni-Cd Slow-PWM (external current control) AN101315-8 AN-1 164 www .national.com 6 ...

  • National Instruments LM3647 - page 7

    2.1.2 Li-Ion Set To: SEL1 SEL2 SEL3 V CC After charging, maintenance charging until battery removal. NA 4.2V/Cell Hi-Z After charging, maintenance charging until battery removal. If battery voltage drops below a predefined value, the charger restarts the charge-process. Li-Ion NA GND After charging, no maintenance charging is applied. If battery vo ...

  • National Instruments LM3647 - page 8

    3.0 LM3647 REFERENCE DESIGN DEMO-BOARD The demo-board provides a combined multi-chemistry solution with hardware for both external constant current source and LM3647 controlled charge current. Located near the top-left corner of the board is the power supply connector (next to the heatsink). When using the external constant current source, a power ...

  • National Instruments LM3647 - page 9

    LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical ...

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Documents that we receive from a manufacturer of a National Instruments LM3647 can be divided into several groups. They are, among others:
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All of them are important, but the most important information from the point of view of use of the device are in the user manual National Instruments LM3647.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals National Instruments LM3647, service manual, brief instructions and user manuals National Instruments LM3647. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product National Instruments LM3647.

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A complete manual for the device National Instruments LM3647, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use National Instruments LM3647 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of National Instruments LM3647.

A complete National Instruments manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual National Instruments LM3647 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the National Instruments LM3647, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the National Instruments LM3647, that we can find in the current document
3. Tips how to use the basic functions of the device National Instruments LM3647 - which should help us in our first steps of using National Instruments LM3647
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with National Instruments LM3647
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of National Instruments LM3647 in a specific country, if it was not possible to solve the problem on our own.

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