Kiwi Instruments KP1051FPA

KP1051 is a highly integrated buck quasi-resonant LED constant-current driver switch.

The KP1051 integrates a high-voltage power MOSFET and a controller on the same die. Additionally, the chip integrates a high-voltage startup circuit and an inductor current zero-crossing detection circuit that requires no auxiliary winding. This enables the system to operate in quasi-resonant mode while greatly simplifying system design.

The KP1051 incorporates comprehensive protection features to ensure safe and reliable system operation, including VDD undervoltage protection, cycle-by-cycle current limiting, over-temperature protection, and LED open-circuit and short-circuit protection.

• Integrated high-voltage 500V MOSFET
• Quasi-resonant operation mode for improved system efficiency
• ±4% constant current accuracy
• Ultra-low operating current
• No auxiliary winding design
• Integrated high-voltage current source for faster startup
• Integrated line voltage compensation for optimized load regulation
• Integrated over-temperature power compensation
• Built-in protection features: cycle-by-cycle current limiting, leading-edge blanking, floating pin protection
• Available packages: SOT-223, SOP-8, TO-92, and SOT23-3L

• LED lighting