EVL6566A-75WES4: 75W, 19V @ 4A, 90 ~ 265V in

Summary

This application note describes the characteristics and the features of a 75 W reference board (p/n EVL6566A-75WES4), tailored on specifications of a typical high-end portable computer power supply.

The peculiarities of this design are the very high efficiency at light load and the excellent global efficiency for a two-stage architecture. The high efficiency at high load is achieved by not using synchronized rectification at the secondary side and therefore offering a very cost-effective solution.

Efficiency during active-load and light-load operation are compliant with ENERGY STAR® eligibility criteria for both external (EPA rev. 2.0 EPS) and computer integrated (EPA rev. 4.0 computers) power supply. In addition this design is even compliant with the latest computer document (EPA rev. 5.0 computers) whose effective date is July 2009.

Specifications

Manufacturer	STMicroelectronics
Category	AC/DC and DC/DC Conversion
Sub-Category	AC/DC SMPS - Single Output
Eval Board Part Number	497-8834-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Board not Stocked
AC Voltage	115 V 230 V Universal (115 / 230V)
Outputs and Type	1 Isolated
Voltage Out	19 V
Current Out	4 A
Output Power	75 W
Features	Over Voltage Protection PFC Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Efficiency @ Conditions	>87%, 115V in, 19V @ 25 ~ 100% Load >83%, 230V in, 19V @ 25 ~ 100% Load
No-load Input Power @ Voltage	83 mW @ 115 V 136 mW @ 230 V
Switching Frequency	125 kHz
Internal Switch	No
Component Count + Extras	128 + 2
Voltage In	90 ~ 265 VAC
Design Author	STMicroelectronics
Application / Target Market	Battery Chargers Computers
Main I.C. Base Part	L6566A
Date Created By Author
Date Added To Library	2017-05