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A8519KETTR-R Datasheet(PDF) 3 Page - Allegro MicroSystems |
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A8519KETTR-R Datasheet(HTML) 3 Page - Allegro MicroSystems |
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3 / 35 page  Wide Input Voltage Range, High-Efficiency, Fault-Tolerant LED Driver A8519 and A8519-1 3 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Table of Contents Specifications 2 Selection Guide 2 Absolute Maximum Ratings 2 Thermal Characteristics 3 Functional Block Diagram 4 Pinout Diagrams and Terminal List 5 Characteristic Performance 10 Functional Description 12 Enabling the IC 12 Powering Up: LED Pin Short-to-GND Check 12 Powering Up: Boost Output Undervoltage 13 Soft-Start Function 14 Frequency Selection 14 SYNC 14 LED Current Setting and LED Dimming 15 PWM Dimming 16 APWM Pin 17 Extending LED Dimming Ratio 18 Analog Dimming 18 LED Short Detect 19 Overvoltage Protection 20 Boost Switch Overcurrent Protection 21 Input Overcurrent Protection and Disconnect Switch 22 Setting the Current Sense Resistor 22 Input UVLO 22 VDD 23 Shutdown 23 Dithering Feature 24 Fault Protection During Operation 25 Application Information 28 Design Example 32 Package Outline Drawings 33 THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information. Characteristic Symbol Test Conditions [1] Value Unit Package Thermal Resistance RθJA LP Package on 2-layer 3 in2 PCB 40 °C/W ET Package on 2-layer 3 in2 PCB Contact factory °C/W LP Package on 4-layer PCB Based on JEDEC Standards 29 °C/W ET Package on 4-layer PCB Based on JEDEC Standards 32 °C/W 1 Additional thermal information available on the Allegro website. |
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