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QX5305
Ø Wide input voltage range: 3.6V~100V Ø High efficiency: up to 95% Ø Maximum operating frequency: 1MHz Ø CS current limit protection voltage: 250mV Ø FB current sampling voltage: 250mV Ø Chip power supply undervoltage protection: 2.5V Ø Adjustable shutdown time Ø External frequency compensation pin
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- Product Description
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- Commodity name: QX5305
- 封装: SOP8
- 品牌: Quanxin
Ø Wide input voltage range: 3.6V~100V Ø High efficiency: up to 95% Ø Maximum operating frequency: 1MHz Ø CS current limit protection voltage: 250mV Ø FB current sampling voltage: 250mV Ø Chip power supply undervoltage protection: 2.5V Ø Adjustable shutdown time Ø External frequency compensation pin
QX5305
The QX5305 is a high-efficiency, high-precision boost-type high-power LED constant current driver control chip.
The QX5305 integrates a high-precision error amplifier, a fixed off-time control circuit, and a constant current drive circuit, making it particularly suitable for high-power, multiple high-brightness LED series constant current driving. The QX5305 uses a fixed off-time control method, with a maximum operating frequency of up to 1MHz, which can reduce the size of external inductors and filter capacitors, improve efficiency, and save PCB area. The off-time can be adjusted via an external capacitor, and the operating frequency can be changed according to user requirements.
By adjusting the external current sampling resistor, the QX5305 can control the drive current of high-brightness LEDs, ensuring the LEDs reach the expected constant brightness. PWM signals can be applied to the EN pin for LED dimming.
The QX5305 uses an SOP8 package.
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