ø 恒压充电器控制


ø 通用恒压源


ø led驱动

" /> qx2305是一款高效率、高精度的升压型dc-dc控制芯片。内置高精度误差放大器,固定关断时间控制电路,pwm比较器,峰值电流限流电路,功率管驱动电路等,特别适合宽电压输入的升压应用。

qx2305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。关断时间最小为620ns,并可通过外部电容进行调节,工作频率也可根据用户要求进行调节。

系统由于采用电流模控制方式,对输入母线电压变化与负载瞬变具有快的瞬态响应速度。

芯片具有逐周期限流保护、输出电压过压保护功能。

qx2305采用sop8封装。


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qx2305

qx2305 is a high efficiency, high precision boost dc-dc control chip. built-in high-precision error amplifier, fixed off-time control circuit, pwm comparator, peak current limiting circuit, power tube drive circuit, etc., especially suitable for boost applications with wide voltage input.

qx2305 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 shutdown time is at least 620ns, and can be adjusted by external capacitors, and the operating frequency can also be adjusted according to user requirements.

because the system adopts the current mode control mode, it has a fast transient response speed to the input bus voltage changes and load transients.

the chip has cycle-by-cycle current limit protection and output voltage overvoltage protection.

qx2305 is available in sop8 package.


ø wide input voltage range: 2.5v ~ 100v

ø high efficiency: up to 90%

ø maximum working frequency: 1mhz

ø cs current limiting protection voltage: 250mv

ø fb sampling voltage: 1000mv

ø chip power supply undervoltage protection: 2.5v

ø built-in current sampling leading-edge blanking circuit

ø external frequency compensation foot

ø adjustable off time


stay tuned for updates!

ø constant voltage charger control


ø universal constant voltage source


ø led driver