ø 线性led照明驱动


ø pwm调光的led照明驱动


ø led手电筒、led台灯、led矿灯、led日光灯等

" /> qx7138是一种pwm调光的、低压差的led线性降压恒流驱动器。
qx7138仅需要外接一个电阻和一个nmos管就可以构成一个完整的led恒流驱动电路,调节该外接电阻就可以调节输出电流,输出电流可调范围为20ma到3.0a。
qx7138还可以通过在dim引脚加外部信号进行pwm调光,dim脚输入信号的频率范围是200hz到10khz,当不需要调光功能时,dim可以悬空。
qx7138正常工作电压为3.0v到6.0v,当电源电压高过6.0v时,通过外部的钳位电路使芯片工作电压钳位在6.0v即可满足高压大电流恒流led驱动。
qx7138采用sot-23-5的封装形式。" />

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qx7138 is a pwm dimming, low dropout led linear buck constant current driver.

qx7138 only needs an external resistor and an nmos tube to form a complete led constant current drive circuit. adjusting the external resistor can adjust the output current. the adjustable range of the output current is 20ma to 3.0a.

qx7138 can also perform pwm dimming by adding an external signal to the dim pin. the frequency range of the dim pin input signal is 200hz to 10khz. when the dimming function is not required, dim can be left floating.

the normal operating voltage of qx7138 is 3.0v to 6.0v. when the power supply voltage is higher than 6.0v, the chip's operating voltage is clamped at 6.0v by an external clamping circuit to meet the high-voltage large-current constant-current led drive.

qx7138 uses sot-23-5 package.


ø power supply voltage: 3.0v ~ 6.0v

ø pwm dimming frequency: 200hz ~ 10khz

ø output current: 20ma to 3.0a

ø output current accuracy: better than ± 5%

ø only need to connect an external resistor and an nmos tube

ø the voltage can be expanded to more than 400v, the current can be expanded to 3.0a


stay tuned for updates!

ø linear led lighting driver


ø pwm dimming led lighting driver


ø led flashlight, led desk lamp, led miner's lamp, led fluorescent lamp, etc.