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KP328X series
KP328X Fixed 18V output, high-performance, low-cost offline PWM control power switch The KP328X series is a high-performance, low-cost PWM control power switch suitable for offline low-power buck applications. It features a simple external circuit and a small number of components. The built-in high-voltage MOSFET also improves the system's surge tolerance. Unlike traditional PWM controllers, the KP328X does not have a fixed clock to drive the MOSFET. The system switching frequency adjusts automatically with the load. The chip also uses multi-mode PWM control technology, which effectively simplifies external circuit design, improves line regulation and load regulation, and eliminates audible noise during system operation. In addition, the internal peak current detection threshold automatically adjusts according to the actual load, effectively reducing standby power consumption under no-load conditions. The KP328X integrates comprehensive protection functions with self-recovery capabilities: VDD undervoltage protection, cycle-by-cycle current limiting, overtemperature protection, overload protection, and VDD overvoltage protection.
Category：
- Product Description
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- Commodity name: KP328X series
- 封装: DIP-8 / SOP-8
- 品牌: Biyi Microelectronics
KP328X Fixed 18V output, high-performance, low-cost offline PWM control power switch The KP328X series is a high-performance, low-cost PWM control power switch suitable for offline low-power buck applications. It features a simple external circuit and a small number of components. The built-in high-voltage MOSFET also improves the system's surge tolerance. Unlike traditional PWM controllers, the KP328X does not have a fixed clock to drive the MOSFET. The system switching frequency adjusts automatically with the load. The chip also uses multi-mode PWM control technology, which effectively simplifies external circuit design, improves line regulation and load regulation, and eliminates audible noise during system operation. In addition, the internal peak current detection threshold automatically adjusts according to the actual load, effectively reducing standby power consumption under no-load conditions. The KP328X integrates comprehensive protection functions with self-recovery capabilities: VDD undervoltage protection, cycle-by-cycle current limiting, overtemperature protection, overload protection, and VDD overvoltage protection.
Main Features
• Fixed 18V output
• Integrated 650V high-voltage MOSFET and high-voltage startup circuit
• Multi-mode control, quiet operation
• Supports buck and buck-boost topologies
• Good line regulation and load regulation
• Integrated soft-start circuit
• Built-in protection functions:
• Overload protection (OLP)
• Cycle-by-cycle current limit (OCP)
• Output overvoltage protection (OVP)
• VDD overvoltage, undervoltage, and voltage clamping protection
• Package type DIP-8 / SOP-8
Product Model Topology Maximum Output Operating Mode Output Withstand Voltage (V) On-resistance (Ω) Startup Standby Power Consumption VDDmax Maximum Frequency Package Current (mA) Characteristics Method (mW) (V) (kHz) KP3281 Buck/Buck-Boost 250 DCM&CCM CV 650V MOS 10 High Voltage Startup <50 30 60 DIP-8 KP3282 Buck/Buck-Boost 600 DCM&CCM CV 650V MOS 4 High Voltage Startup <50 30 60 SOP-8 KP3282 Buck/Buck-Boost 600 DCM&CCM CV 650V MOS 4 High Voltage Startup <50 30 60 DIP-8 KP3284 Buck/Buck-Boost 800 DCM&CCM CV 650V MOS 2 High Voltage Startup <100 30 60 DIP-8
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