ø led灯杯


ø 电池供电的led灯串


ø 平板显示led背光


ø 恒流充电器控制


ø 大功率led照明

" /> qx5305 是一款高效率、高精度的升压型大功率led灯恒流驱动控制芯片。

qx5305内置高精度误差放大器,固定关断时间控制电路,恒流驱动电路等,特别适合大功率、多个高亮度led灯的串恒流驱动。qx5305采用固定关断时间的控制方式,其工作频率最高可达1mhz,可使外部电感和滤波电容体积减小,效率提高,节省pcb面积。关断时间可通过外部电容进行调节,工作频率可根据用户要求而改变。

qx5305通过调节外置的电流采样电阻,能控制高亮度led灯的驱动电流,使led灯亮度达到预期恒定亮度。在en端加pwm信号,还可以进行led灯调光。

qx5305采用sop8封装。


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qx5305 is a high-efficiency, high-precision boost type high-power led lamp constant current drive control chip.

qx5305 has a built-in high-precision error amplifier, fixed off-time control circuit, constant current drive circuit, etc. it is especially suitable for high power, multiple high-brightness led string constant current drive. the qx5305 uses a fixed off-time control method, and its operating frequency can be up to 1mhz, which can reduce the volume of external inductors and filter capacitors, improve efficiency, and save pcb area. the turn-off time can be adjusted by an external capacitor, and the operating frequency can be changed according to user requirements.

qx5305 can control the drive current of high-brightness led lamp by adjusting the external current sampling resistor, so that the brightness of led lamp can reach the expected constant brightness. adding a pwm signal to the en terminal can also perform dimming of led lights.

qx5305 is available in sop8 package.


ø high efficiency: up to 95%
ø maximum working frequency: 1mhz
ø cs current limiting protection voltage: 250mv
ø fb current sampling voltage: 250mv
ø chip power supply undervoltage protection: 2.5v
ø adjustable off time
ø external frequency compensation foot

stay tuned for updates!

ø led light cup


ø battery-powered led light string


ø flat panel display led backlight


ø constant current charger control


ø high-power led lighting