Chip-Rail CR5218SG

CR5218 is a self-powered dual-winding high-performance primary-side sensing PWM controller with a built-in fast-start function that significantly reduces startup time. Internally, it employs multi-mode control efficiency balancing technology to optimize system standby power consumption and improve efficiency. It also incorporates primary inductance compensation technology and integrated output line voltage compensation technology to ensure CC/CV output accuracy during mass production. The built-in full-voltage power adaptive compensation technology guarantees constant current output across the full voltage range (90V~264V). Operating with a self-powered primary-side control scheme, it eliminates the need for TL431, optocouplers, and auxiliary supply diodes, and is capable of operating under dual-winding conditions.

• Built-in fast startup, no startup resistor required
• Built-in self-supply, no supply diode required
• Primary-side sensing topology, no optocoupler or 431 required
• High-accuracy CV and CC output across full voltage range
• Programmable CC/CV mode control
• Multi-mode efficiency balancing control
• Built-in output line voltage compensation
• Built-in primary inductance deviation compensation
• Built-in full-voltage power adaptive compensation
• Built-in over-temperature protection
• Built-in FB open and short circuit protection
• Built-in leading-edge blanking
• Cycle-by-cycle overcurrent protection
• High power density package with quad-pin heat dissipation
• SOP-8L green package

• Low-power AC adapters
• Cellular phone chargers
• Christmas lights, LED drivers
• Linear regulator and RCC replacement