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QX2305
Wide input voltage range: 2.5V~100V High efficiency: Up to 90% Maximum operating frequency: 1MHz CS current limit protection voltage: 250mV FB sampling voltage: 1000mV Chip undervoltage protection: 2.5V Built-in current sampling leading edge blanking circuit External frequency compensation pin Adjustable shutdown time
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- Product Description
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- Commodity name: QX2305
- 封装: SOP8
- 品牌: Quanxin
Wide input voltage range: 2.5V~100V High efficiency: Up to 90% Maximum operating frequency: 1MHz CS current limit protection voltage: 250mV FB sampling voltage: 1000mV Chip undervoltage protection: 2.5V Built-in current sampling leading edge blanking circuit External frequency compensation pin Adjustable shutdown time
QX2305
The QX2305 is a high-efficiency, high-precision boost DC-DC control chip. It integrates a high-precision error amplifier, a fixed off-time control circuit, a PWM comparator, a peak current limiting circuit, and a power tube drive circuit, making it particularly suitable for boost applications with wide voltage input.
The QX2305 uses a fixed off-time control method, with a maximum operating frequency of up to 1MHz. This allows for smaller external inductors and filter capacitors, resulting in improved efficiency and reduced PCB area. The minimum off-time is 620ns and can be adjusted via an external capacitor; the operating frequency can also be adjusted according to user requirements.
Because the system uses current mode control, it has a fast transient response speed to changes in input bus voltage and load transients.
The chip has cycle-by-cycle current limiting protection and output overvoltage protection functions.
The QX2305 uses an SOP8 package.
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