KP2801SGA

High performance, quasi-resonant booster type constant voltage power factor correction controller

The KP2801SGA is a high-performance, quasi-resonant (QR) Boost type (Boost) constant voltage power factor correction (PFC) controller. The chip adaptively operates in critical on-mode (CRM) and discontinuous on-mode (DCM). Full load when the chip works in CRM; When the load is reduced, the chip works in DCM, and the working frequency is reduced to improve the system efficiency. By optimizing the CRM/DCM control algorithm and input line voltage feedforward compensation, the chip can easily achieve high power factor (PF) and low input harmonics (THD) performance, even if the chip operates in DCM. In addition, the chip further improves the light-load efficiency through the Burst mode and greatly reduces the system standby loss.

KP2801SGA Built-in high voltage start and power supply circuit, without external power supply can achieve fast start and power function. In addition, degaussing detection technology without auxiliary windings simplifies system design and reduces production costs.

The KP2801SGA is fully integrated with protection features, including: VDD Undervoltage Protection (UVLO), VDD Overvoltage Protection (VDD OVP), Input Undervoltage protection (BOP), Output Undervoltage protection (UVP), two-stage Output Overvoltage protection (OVP), Cycle by Cycle Current Limit (OCP), Abnormal Overcurrent Protection (AOCP), Overheat Protection (OTP) And pin open short circuit protection.

Main feature

• Built-in 700V high-voltage power supply circuit, starting time <200ms

• Light load efficiency optimization and standby loss optimization

• Power factor >0.95, THD<8%

• Light load THD optimization

• Dynamic performance optimization

• Support single winding inductance

• Built-in ±2% (@Tj=25℃) constant voltage reference voltage

• Encapsulation type SOP-8

• Internal protection functions:

• VDD overvoltage/Undervoltage protection (VDD OVP/UVLO)

• Input Undervoltage Protection (BOP)

• Output Undervoltage protection (UVP)

• Two-stage output Overvoltage Protection (OVP)

• Cycle Current Limit (OCP)

• Abnormal Overcurrent Protection (AOCP)

• Overheat protection (OTP)

• Pin open short circuit protection

Typical application

• LED lighting power supply and adapter power supply