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    LED antihypertensive constant current chip introduction H6228E stage lamp co-anode dimming drive scheme

     

    H6228E is a buck-down LED constant current driver for a continuous inductor current conduction mode for driving one or more LED strings. The H6228E operating voltage ranges from 4V to 60V, providing an adjustable output current, and the output current can reach 1.7A. H6228E built-in power switch tube, adopts high-end current detection circuit, supports PWM mode dimming, and the luminance can reach 65536. H6228E has built-in over-temperature protection circuit, when the chip reaches the over-temperature protection point into the over-temperature protection mode, the output current gradually decreases to improve system reliability. The H6228E circuit architecture enables the output current without power when the low pressure difference is operated, improves the LED working life, and the constant current circuit employed by the H6228E has excellent load adjustment and linear adjustment rate. Low pressure High-end current detection Current accuracy ± 5% Built-in 60V low voltage MOS Enter width voltage 4 ~ 60V Output current can be up to 1.7A Switching frequency up to: 1MHz High efficiency: high can be 98% Huiitude control frequency is up to: 25kHz Hall loop control, no loop compensation Built-in intelligent temperature protection, high temperature drop current Excellent load adjustment rate and linear adjustment rate H6228e adopts ESOP-8 package typical application: Stage lights Intelligent lighting Washing light, landscape lighting LED spare light, signal light Architectural lighting, car lighting Low voltage LED spotlights instead of halogen lamps H6228E integrates OTP thermal protection. When the chip junction temperature reaches 150 ° C, it will begin to gradually reduce the output load current, thereby limiting the input power to improve the reliability of the system. Typical schematic:, read full text

     

     

     

     

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