CR6238T

The CR6238T by CR is a high-performance offline PWM power switch designed for low power AC/DC charger and adaptor applications. It operates in primary-side sensing, providing constant voltage (CV) and constant current (CC) regulation without the need for a TL431 and opto-coupler. This device offers up to 5% precision for both CV and CC regulation across a universal AC input range.

Key features include a flyback topology in DCM operation, soft-start, built-in leading edge blanking (LEB), and frequency jitter to reduce system EMI. The CR6238T supports programmable CV and CC regulation, with adjustable constant current and output power settings. It also incorporates built-in secondary constant current control with primary side feedback and secondary constant voltage sampling controller. Cable drop compensation is included to enhance output accuracy.

For system reliability, the CR6238T is equipped with rich protections, including VDD Under Voltage Lockout (UVLO) with hysteresis, Cycle-by-Cycle Current Limiting and Peak Current Protection (OCP), Over Temperature Protection (OTP), VDD Over Voltage Protection (OVP), and VDD Clamp. It is available in lead-free SOP-8L and DIP-8L packages.

Applications for the CR6238T include cell phone chargers, digital camera chargers, small power adaptors, and auxiliary power for PCs and TVs. It can also serve as a replacement for linear regulators and RCC configurations.