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KP3114 is a high performance Switch Mode Power Supply Switcher for low power off-line application with minimum components in typical buck solution. This IC has built-in high break down voltage MOSFET to withstand high surge input.

Unlike conventional PWM control, there’s no fixed internal clock in KP3114 to trigger the GATE driver,   the switching frequency is changed according to the load condition. The multi-mode PWM control is  integrated to simplify circuit design and achieve good line and load regulation without audio noise generated. The peak current limit changes according to the real load condition for low standby power in no load.

KP3114 integrates functions and protections of Under Voltage Lockout (UVLO), Cycle-by-cycle Current Limiting (OCP), Output OVP, On-chip Thermal Shutdown, Over Load Protection (OLP) with Auto Recovery Mode Protection, etc.


◆  Integrated with 700V Power MOSFET and HV Startup Circuit

◆  Multi-Mode Control with Audio Noise Free Operation

◆  Supports Buck and Buck-Boost Topologies

◆  Support Ultra-low Input Voltage (>20V)

◆  Less than 100mW Standby Power

◆  Up to 30kHz Maximum Frequency

◆  Good Line and Load Regulation

◆  Built-in Soft Start

◆  Build in Protections:

¡ Over Load Protection (OLP)

¡ Cycle-by-Cycle Current Limiting (OCP)

¡ Output OVP

¡ On-chip OTP

◆  Available with SOP-8 Package

Typical Application


Small Home Appliance

Datasheet Download