Chip-Rail CR6234

CR6234 is a high-performance primary-side sensing PWM controller with standby power consumption below 75mW. It incorporates multi-mode control efficiency balancing technology to optimize system standby power consumption and improve efficiency, along with primary inductance compensation and integrated output line voltage compensation to ensure CC/CV output accuracy in mass production. The built-in full-voltage power adaptive compensation ensures constant output power across the full voltage range (90V~264V).

It uses primary-side control, eliminating the need for TL431 and optocouplers.

CR6234 integrates multiple functions and protection features, including UVLO, VDD OVP, soft start, OTP, cycle-by-cycle OCP, CS pin open-circuit protection, output short-circuit protection, and a built-in leading-edge blanking circuit, ensuring high reliability.

• Standby power below 75mW, with built-in over-temperature protection
• Primary-side sensing topology, no optocoupler or TL431 required
• Built-in CS open-circuit protection
• High-accuracy CV and CC output across full voltage range, with built-in output short-circuit protection
• Programmable CC/CV mode control
• Built-in leading-edge blanking
• Efficiency balancing technology with multi-mode control
• Low startup and operating current
• Built-in output line voltage compensation
• Built-in primary inductance deviation compensation, cycle-by-cycle overcurrent protection
• Built-in full-voltage power adaptive compensation
• SOT23-6L green package

• Small power adapters
• Computer and server auxiliary power supplies
• Cellular phone chargers
• Replacement for linear regulators and RCC
• Digital camera chargers