KP311A
High Precision 5V Default Output
Integrated with 500V MOSFET and High Voltage Startup Circuit
No External Rsense needed, Low BOM Cost
Support Ultra-low Input Voltage (>12V)
Support Buck and Buck / Boost Topology
On/OFF Peak Current Mode Control
Less than 50mW Standby Power
Built-in 31kHz Oscillator with Frequency Shuffling
Built-in Soft Start
Very Low VDD Operation Current
Build in Protections:
Over Load Protection (OLP)
On-Chip Thermal Shutdown (OTP)
Cycle-by-Cycle Current Limiting (OCP)
Abnormal Over Current Protection
(AOCP)
Leading Edge Blanking (LEB)
VDD UVLO
SOT23-3 Package Available
KP311A is a low cost, highly integrated PWM power switch for non-isolated buck and buck-boost applications.
KP311A combines a 500V power MOSFET with the ON/OFF PWM controller in one chip. The IC can achieve high precision 5V default Output at universal AC input. In KP311A, Toff_min is set to 32μs with frequency shuffling. The IC has built-in green mode control for light and zero loadings, which can achieve less than 50mW standby power.
KP311A integrates functions and protections of Under Voltage Lockout (UVLO), Cycle-by-cycle Current Limiting (OCP), On-chip Thermal Shutdown (OTP), Abnormal Over Current Protection (AOCP), Over Load Protection (OLP) Short Load Protection (SLP), etc.
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