KP311B
High Precision 5V Default Output
Up to 50kHz Switching Frequency
Integrated with 500V MOSFET and High Voltage Startup Circuit
Integrated Sense Resistor, Low System Cost
Support Ultra-low Input Voltage (>15V)
Support Buck&Buck-Boost Topology
On/OFF Peak Current Mode Control
Lower Standby Power Dissipation(<50mW)
Built-in Soft Start Circuit
Ultra-low VDD Operation Current
Built-in Protections:
Overload Protection (OLP)
On-Chip Thermal Shutdown (OTP)
Cycle-by-Cycle Current Limiting (OCP)
Abnormal Over Current Protection (AOCP)
Leading Edge Blanking (LEB)
VDD UVLO
TO-92, SOT23-3 Package Available
KP311B is a low cost, highly integrated PWM power switch for non-isolated buck and buck-boost convertor applications.
KP311B integrates a 500V power MOSFET with ON/OFF PWM controller in one chip. The IC can achieve high precision 5V default output at full range AC input. In KP311B, Toff_min is set to 20μs with frequency jitter function to improve EMI performance. The IC has built-in green mode control for light and zero loadings, which can achieve lower than 50mW standby power dissipation.
KP311B integrates multiple protections: Under Voltage Lockout (UVLO), Cycle-by-cycle Current Limiting (OCP), On-chip Thermal Shutdown (OTP), Abnormal Over Current Protection (AOCP),Overload Protection (OLP) Short Load Protection(SLP), etc.
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