A8430EEKTR-T Allegro Microsystems Inc, A8430EEKTR-T Datasheet
A8430EEKTR-T
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A8430EEKTR-T Summary of contents
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White LED Driver Constant Current Step-up Converter Discontinued Product These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available. Date of status change: May 3, 2010 Recommended Substitutions: ...
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White LED Driver Constant Current Step-up Converter A8430 MLPD Approximate actual size 1 5 VIN SW GND Same pad footprint as SOT-23 °C/W, see note 1, page 2 θ LUTE ...
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White LED Driver Constant Current Step-up Converter VIN V REF 1. Enable ELECTRICAL CHARACTERISTICS Characteristics Input Voltage Range Supply Current Feedback Reference Voltage Feedback Input Current Switch Current Limit Switch Frequency Switch Maximum Duty Cycle ...
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White LED Driver Constant Current Step-up Converter Operating Characteristics Using Typical Application Circuit (Schematic 1) Quiescent Current versus Input Voltage 2.5 2.0 1.5 1.0 0 (V) IN Feedback Bias Current versus Temperature 20 ...
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White LED Driver Constant Current Step-up Converter Typical Application A typical application circuit for the A8430 is provided in schematic diagram 1. This illustrates a method of driving three white LEDs in series. The conversion efficiency of this configuration is ...
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White LED Driver Constant Current Step-up Converter Device Operation The A8430 uses a constant-frequency, current-mode control scheme to regulate the current through the load. The load current produces a voltage across the external sense resistor (R1) and the input at ...
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White LED Driver Constant Current Step-up Converter Component Selection The component values shown in schematic 1 are sufficient for most applications. To reduce the output ripple the inductor may be increased, but in most cases this results in excessive board ...
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White LED Driver Constant Current Step-up Converter By applying a PWM signal directly to the EN pin, the A8430 is turned on or off, and I is either full (as defined by LOAD R1) or zero. By varying the duty ...
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White LED Driver Constant Current Step-up Converter Overvoltage protection for the A8430 requires a Zener diode to clamp the output voltage, as shown in schematic 5. The Zener voltage should be greater than the maximum output voltage of the LED ...
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White LED Driver Constant Current Step-up Converter Terminal List Table Pin 3.00 BSC 0.45 0.30 0.50 .020 0.30 .012 .008 R0.20 REF 0.75 .030 0.75 NOM 0.50 .020 NOM MIN 5 0.15 .006 MIN 3.40 ...
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White LED Driver Constant Current Step-up Converter The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from ...