{"id":38794,"date":"2020-12-03T14:38:00","date_gmt":"2020-12-03T20:38:00","guid":{"rendered":"https:\/\/flex.com\/resources\/achieving-the-highest-power-density-in-isolated-digital-dc-dcs"},"modified":"2026-03-15T14:59:43","modified_gmt":"2026-03-15T19:59:43","slug":"achieving-the-highest-power-density-in-isolated-digital-dc-dcs","status":"publish","type":"resource","link":"https:\/\/flex.com\/zh\/resources\/achieving-the-highest-power-density-in-isolated-digital-dc-dcs","title":{"rendered":"\u5b9e\u73b0\u9694\u79bb\u5f0f\u6570\u5b57 DC\/DC \u7535\u8def\u4e2d\u6700\u9ad8\u7684\u529f\u7387\u5bc6\u5ea6"},"content":{"rendered":"
<\/div>\n
\n\t
\n\t\t
\n\t\t\tFlex<\/a>\n\t\t\t<\/svg>\n\t\t\tResources<\/a>\n\t\t\t<\/svg>\n\t\t\tAchieving the highest power density in isolated digital DC\/DCs<\/a>\n\t\t<\/div>\n\t\t

Achieving the highest power density in isolated digital DC\/DCs<\/h1>\n\t\t\t\t
<\/div>\n\t\t
\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\tPosted on
\n\t\t\t\t3 12 \u6708, 2020\t\t\t<\/div>\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tBlog<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tCommunications<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tData Center Power<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tPower<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tPower Modules<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t<\/div>\n<\/div>\n\n\n\n
\n\t
\n\t\t
\n\t\t\t\n\n

In telecom and data center<\/a> applications, everyone is trying to fit more performance and functionality into smaller spaces, and power supplies have to keep up with this trend. For example, a typical 4G base station remote radio unit (RRU) might require 300 W input power, while a 5G equivalent would need somewhere between 1,100 W and 1,500 W.<\/p>\n\n\n\n

Flex Power Modules has always pushed to develop the highest power density components available, and with the BMR491<\/a>, it\u2019s reached that goal for digital DC\/DC isolated converters. Let\u2019s look at how that\u2019s been achieved, and what it means for power system designers.<\/p>\n\n\n\n

In this blog, we focus on the industry-standard quarter brick format for power modules, which measures 57.9 x 36.8 x 14 mm (2.28 x 1.45 x 0.55 in.). This is commonly used in both telecom applications, which typically run on a 48 V supply voltage, and data centers, which use a supply voltage between 40 V and 60 V.<\/p>\n\n\n\n

Looking back, Flex Power Modules\u2019 first-generation quarter brick isolated DC\/DC converter is the BMR453, aimed at the telecom market. This delivers up to 300 W, with a typical efficiency of up to 96.1%. It also supports paralleling through droop load sharing, enabling multiple converters to be used together to achieve higher power.<\/p>\n\n\n\n

As the technology improved, the second-generation BMR456<\/a> was able to increase its maximum power output to 468 W, in the same quarter brick format. The trend continued, with the 3rd generation version, the BMR458<\/a>, achieving a power output of up to 650 W. With the 4th generation BMR480<\/a>, this figure jumped to 1300 W, marking a substantial increase in power density. All of these converters, as well as the later products in this line, continue to support paralleling.<\/p>\n\n\n\t\t<\/div>\n\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t<\/div>\n<\/div>\n\n
\n\t