HF920 is a flyback regulator with a monolithic 900V MOSFET. HF920 provides excellent power regulation in AC-DC applications that require high reliability. The switching frequency can be programmed with a single resistor. Also a special frequency doubling mode, designed for strong magnetizing application, can be enabled through a simple external setup.
EVHF920-S-00B evaluation board is specially designed for a better EMC performance with very few EMI filters, which provides reference to effective PCB design for the customer. It features an off-line wide input voltage (85VAC~350VAC) with dual outputs (16.5V/300mA, 16.5V/100mA), and a highly strong anti-interference ability to external magnetic field with the use of transformer core EF20, and is very suitable for the power meter application.
EVHF920-S-00B can meets EN55022 conducted EMI requirements easily with frequency jittering function. It offers a full suite of protective features such as over-temperature protection, VCC under-voltage lockout, over-voltage protection, over-load protection and short-circuit protection.