LM3430_07 NSC [National Semiconductor], LM3430_07 Datasheet
LM3430_07
Related parts for LM3430_07
LM3430_07 Summary of contents
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LED Backlighting Solution with LM3430 and LM3432 Introduction Since the release of high brightness White LED (HB-WLED) in the middle of 1990's, tremendous research efforts have been undergoing to improve the emission efficiency, reliability and thermal packaging technologies in order ...
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Demonstration Board Schematic www.national.com 2 30028901 ...
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Connecting the Demonstration Board to LED Panel LM3430+LM3432 Demonstration Board Connecting the demonstration board outputs to the LED pan simple; just use a flat cable connecting the output header, CN1 to the respective input points of the LED ...
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Configuration of the Demonstration Board for Evaluation Analog PWM Dimming Mode • Leave jumper JP3 open to enable the Analog Dimming Mode; • Short pins 1-2 of jumper JP5 to select the Analog control input; • The VR1 is used ...
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Connect Power Supply to the Demonstration Board Input supply voltage connected to the V IN solder pads of the demonstration board 21V. Once the power is applied, all LEDs on the LED panel will be lighted ...
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Demonstration Board in Operation (Powered by a Notebook Adapter) www.national.com 6 30028905 ...
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Typical Operating Waveforms In below some operating waveforms are presented for refer- ence. The demonstration board is powered by a note-book adaptor with nominal output voltage of 16VDC. Power-Up PWM Dimming Characteristic Rising Edge (Channel 1 Waveform) Analog PWM Dimming ...
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PCB Layout LM3430+LM3432 Demonstration PC Board Top Overlay www.national.com 30028910 8 ...
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LM3430+LM3432 Demonstration PC Board Top Layout 9 30028911 www.national.com ...
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LM3430+LM3432 Demonstration PC Board Bottom Layout www.national.com 30028912 10 ...
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Bill of Materials for the Demonstration Board Designation Type Boost Converter Section (LM3430 Controller IC M1 N-MOSFET D1 Schottky Diode L1 Power Inductor C20 Ceramic Capacitor "C22 - C25 Ceramic Capacitor GRM55DR61H106KA88L C28 - C31" C0, C1, C21 ...
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Designation Type Current Control Section (LM3432 LED Current Regulator IC C34 Ceramic Capacitor C35 Ceramic Capacitor C36, C38 Ceramic Capacitor C37 Ceramic Capacitor R7 Resistor R25 Resistor R27, R28 Resistor R38 Resistor R39 Resistor VR1 Variable Resistor FAULTb ...
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... Some hints on selection of the key parameters and com- ponents will be described in below. For full details of the design equations and theories, please refer to the LM3430 and LM3432 datasheets. BOOST CONVERTER DESIGN WITH LM3430 The function of the boost converter is to step up the input voltage to a higher LED rail voltage to drive strings of twelve LEDs connected in series ...
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Selecting the Current Sensing Resistor The current sensing resistor, R SNS regulation of the inductor current and to provide cycle by cycle current limit function. The resistance selected must be low enough to keep the power dissipation to a minimum ...
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Selection of Gain Setting Resistor for Dynamic Headroom Control By connecting the VDHC pin of LM3432 through a gain setting resistor to the VDHC pin of the LM3430, the LM3432's DHC function will regulate the LED rail voltage from the ...
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THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE ...