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    H6911 Introduction LED boost large current constant current chip H6911 drive IC-peak current detection dimming luminance 65536

     

    ● Overview H6911 is an external NMOS high efficiency, high-precision boosting high-power LED constant current drive chip. H6911 built-in high-precision error amplifier, fixed shutdown time control circuit, constant current drive circuit, etc., suitable for high power, multiple high-brightness LED string constant current drives. The H6911 is controlled by a fixed shutdown time. The shutdown time can be adjusted by an external capacitor, and the operating frequency can be changed according to user requirements. By adjusting the external current sampling resistor, the H6911 can control the drive current of the high-brightness LED lamp, so that the LED lamp is intended to achieve constant brightness. At the EN terminal plus the PWM signal, the LED light is also possible. The H6911 integrates VDD regulator, soft start, and over-temperature protection circuits, reducing peripheral components and improves system reliability. The H6911 is encapsulated in an ESOP8. ● Features wide input voltage range: 2.5V ~ 24V external MOS high efficiency: up to 95% Output voltage: VIN * 5FB Current sampling voltage: 250MV chip supply undervoltage protection: 3.2V turn-off time adjustable external frequency compensation foot Intelligent over temperature protection short-circuit protection dimming depth 0.1% dimming luminance 65536 grade dimming frequency 25k quarter current 3UA soft start built-in VDD regulator tube ● Application field LED lamp cup battery powered LED string tablet display LED backlight high power LED lighting Typical schematic:, read full text

     

     

     

     

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