Hangzhou Silan Microelectronics SDH7753STR

SDH7753 is a high-precision LED constant-current driver control IC designed for non-isolated buck-type LED constant-current power supply systems with a full AC input voltage range of 85VAC to 265VAC.

SDH7753 integrates a 500V high-voltage power MOS with a built-in high-voltage supply circuit, enabling autonomous chip power supply without startup resistors or auxiliary windings, while eliminating the conventional external supply capacitor. This accelerates system startup and significantly reduces system cost.

SDH7753 operates in inductor current critical conduction mode. The IC employs a proprietary high-precision current sampling technique combined with internal compensation to achieve high constant-current accuracy and excellent line/load regulation.

SDH7753 integrates multiple protection features, including output short-circuit protection, cycle-by-cycle overcurrent protection, over-temperature regulation, and sense resistor open-circuit protection, enhancing system safety and reliability.

• Built-in 500V high-voltage power MOSFET
• Integrated high-voltage supply, no external supply capacitor required
• Precise constant current (<±3%) for LED driving
• Output short-circuit protection
• Thermal regulation
• Cycle-by-cycle overcurrent protection
• No auxiliary winding required

• Bulb lights
• Downlights
• Other LED lighting applications