One of the eFuse integrated protection chips launched by Littelfuse is LS0505EVD22 series. This product complies with the USB-PD standard and supports 100W maximum power, that is, when 20 V/5 A power is applied at the Vbus end, it has the ability to pass this power without damage. At the same time, the Vbus short circuit to ground lasts for 20 min. In the application of 5 V/1 A, the component temperature is only 37 ℃, which is far lower than that of similar competitors of well-known brands in the market. The excellent temperature rise performance of this long time micro short circuit test is due to the lower RdsOn. The RdsOn of LS0505EVD22 is 50 m Ω. On the whole, the lower RdsOn can not only reduce the loss, but also give consideration to the design requirements and system reliability, meeting the key indicators of device temperature rise evaluation during the operation of portable products.
Typical Applications
Functional Block Diagram
At present, the input voltage of similar products widely used in the market is 30 V, but most of the output voltage is 12 V. Therefore, the bid was directly burned during the 20 V/5 A test. However, Littelfuse LS0505EVD22 series has extremely high input/output withstand voltage, which reaches 30 V in both directions. It is in a leading position in the industry and fully meets the basic requirements set by users.
Application Schematic Pinout Designation
The LS0505EVD22 series supports a continuous working current of 5 A, which has greater advantages over the products provided by competitive manufacturers. The higher output current provides great convenience for subsequent product upgrading. It is predicted that the current specification for similar applications in the future is expected to be increased to 3 A. This will maintain the same BOM in the system design, reduce the new product evaluation link of the designer, reduce material management, and greatly save human resource costs.
The magnetic suction charging wire application scheme designed by Littelfuse LS0505EVD22 series, which integrates overvoltage protection, overcurrent protection, over temperature protection, short circuit protection and other functions, was finally selected. With excellent system performance, it passed the user's rigorous technical evaluation and won the bid. It is worth mentioning that the over temperature (OT) protection function plays a crucial role in the system application. The DFN2X2 with small size and high integration_ The 8L package also meets the basic requirements of such applications.
