LED Flashlight IC>QX5278 Current position: 产品中心 > LED驱动 > LED手电筒专用IC

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The main parameters:

Operating voltage:2.4V~5.5V

LED current:<500mA

LED current determined by external resistor
Efficiency:up to 90%
Under voltage protection:2.4V
Over voltage protection:5V
Current accuracy:±5%

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QX5278 is a buck-boost constant-current LED driver chip, especially suitable for LED light implementations powered by lithium batteries or triple-cell batteries. When the supply voltage is smaller than the break-over voltage of the LED light, QX5278 functions in boost mode; when the supply voltage is higher than the break-over voltage of the LED light, QX5278 functions in buck mode.

The working voltage of QX5278 is 2.4V – 5.5V. Its operating current is less than 500 mA, its efficiency can reach up to 90% and its current accuracy is within 5%. The LED current is determined by external resistance. QX5278 also provides a 2.4V under voltage shutdown protection, a 5V open circuit protection and output short circuit protection. QX5278 uses SOP8 packaging.


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