A8435EESTR-T Allegro Microsystems Inc, A8435EESTR-T Datasheet
A8435EESTR-T
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A8435EESTR-T Summary of contents
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High Efficiency Charge Pump White LED Driver This device is in production, however, it has been deemed Pre-End of Life. The product is approaching end of life. Within a minimum of 6 months, the device will enter its final, Last ...
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High Efficiency Charge Pump White LED Driver Features and Benefits ▪ Proprietary adaptive control scheme (1×, 1.5×) ▪ Maximum efficiency, over 92% ▪ 0.5% LED current matching ▪ 1 MHz operating frequency ▪ Flexible dimming control: ▫ Serial 11-level dimming, ...
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... A8435 Selection Guide Part Number A8435EESTR-T 7-in. reel, 1500 pieces/reel *Contact Allegro for additional packing options. VIN CIN 1 µF EN1 EN2 CTRL ISET RSET Ab so lute Max i mum Rat ings Input or Output Voltage VIN, VOUT, C1+, C1–, C2+, and C2– pins ..................... –0 All other pins ..................................................... – ...
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A8435 Terminal List Table Name Pin Number C1– 13 Negative terminal of capacitor C1. C1+ 16 Positive terminal of capacitor C1. C2– 15 Negative terminal of capacitor C2. C2+ 1 Positive terminal of capacitor C2. Brightness control scheme toggle. For ...
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A8435 1 ELECTRICAL CHARACTERISTICS 3 μ EN1 EN2 1 2 Characteristics Input Voltage Range Undervoltage Lockout Threshold UVLO Hysteresis Window Quiescent Current Soft-Start Completion Time ISET ...
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A8435 Tests performed using application circuit shown in figure 1: dual wire control; and V = 3.6 V, EN1 = EN2 = VIN 120 100 High Efficiency Charge Pump White LED Driver Performance Characteristics = ...
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A8435 Startup Response Symbol Parameter Units/Division BATT OUT t time 500 μs 2-Bit (EN1-EN2) Dimming Response Symbol Parameter Units/Division EN1 ...
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A8435 Setting LED Current The LED current level set by the value chosen for the LEDX external resistor, RSET, which is connected to the ISET terminal. The full current (100%) level for I LEDX the following formulas: ...
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A8435 When changing from one specific brightness level to another, the user may not want to keep the existing brightness level stored in memory. A simpler method is to program a shutdown and re-enable, followed by an appropriate number of ...
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A8435 17X 0.08 C +0.05 0.25 –0.07 +0.15 0.40 –0. Copyright ©2005-2008, Allegro MicroSystems, Inc. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec ...