KP28122SGA

High PF non-isolated BUCK constant voltage built-in MOS chip, non-isolated dimming without stroboscopic chip

KP28122SGA is a constant voltage output power switch for dimming and toning LED applications. The chip adopts quasi-resonant mode and adaptively adjusts the output voltage, which not only meets the voltage requirement of the linear constant current after the stage, but also improves the efficiency of the system. The KP28122SGA has an integrated high-voltage 500V power MOSFET and high-voltage start and power supply circuit, simplifying system design and production costs. The chip has a light load frequency reduction mode, which can improve the stability of the system under light load or no load, and has a high efficiency. KP28122 is integrated with complete protection functions, including: VDD undervoltage protection (UVLO), output overvoltage protection (OVP), output short circuit protection (SCP), cycle by cycle current limit (OCP), built-in overheat protection, and front blanking (LEB).

Main feature

• Quasi-resonant working mode, high efficiency

• Power factor >0.9

• Patented adaptive constant voltage control architecture

• Integrated high voltage start and power supply circuit

• Integrated high voltage 500V MOSFET

• No noise in full load range

• Encapsulation type SOP-8

• Integrated protection features:

• VDD Undervoltage Protection (VDD UVLO)

• Output Overvoltage protection (OVP)

• Output Short-circuit Protection (SCP)

• Overheat protection (OTP)

• Front blanking (LEB)

Typical application

• Dimming and color intelligent lighting

• Constant voltage power supply

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