ob2500p is an off-line pulse width modulation controller for AC\/DC chargers and power adapters up to 25W
Applications do not need TL431 and optical couplings, which greatly reduces the cost of application devices. The chip built-in constant current\/constant voltage two control modes: The constant current control mode adopts the transformer primary inductance compensation technology to improve the consistency of the output constant current. Constant voltage control mode adopts multi-mode control mode, which is reasonably compatible with chip, sum rate. In the full voltage AC input range, the adaptive compensation technology is adopted, the output overpower protection point has a high consistency, and the built-in line loss compensation circuit ensures a high output voltage accuracy. Perfect protection functions are designed, including: soft start function, cycle current limit, peak current limit, over temperature protection, over voltage protection, power clamp and under voltage lock function. In addition, the frequency jitter function and soft drive function set inside the chip ensure that the chip has a good anti-electromagnetic interference performance when working. SOT23-6 package.
Features: constant voltage and constant current accuracy up to ±5% CC\/CV mode, no TL431 and optocoupler constant current and output power adjustable adjustable line loss compensation, primary inductance compensation and full AC input constant power adaptive compensation Frequency jitter, good EMI characteristics