Description

LP3717BSH is a highly integrated isolated adapter. And the self-powered PSR control chip of the charger, the peripheral design is extremely simple Single. LP3717BSH can adjust the original edge peak current through the external resistor, Then set the output constant current point through the original and secondary edge run ratio of the transformer; through Set the FB upper bias resistance and the lower bias resistance to set the output constant voltage point. In order to achieve the extreme simplification of system costs, LP3717BSH within Set up the starting circuit, and the peripheral does not need the starting resistance; use self-powered The method is to cancel the auxiliary winding VCC power supply diode. In order to achieve a better output voltage adjustment rate, LP3717BSH Built-in output cable compensation function, which can be set to FB externally The value of the partial resistance is used to adjust the compensation value of the output cable. LP3717BSH integrates a variety of protection functions, including VCC Clamp position/ow-voltage protection, FB foot resistance open circuit protection, output short circuit Protection, output overvoltage protection and overtemperature protection and other protective functions. LP3717BSH adopts SOP8L packaging