[SiC Adoption Examples] TDK-Lambda Corp. Naturally Air-Cooled 600W AC-DC Power Supply

ROHM’s high efficiency SiC SBDs and considerable development support capabilities contribute to the commercialization of TDK's new naturally air-cooled 600W AC-DC power supply

Adoption Background

Generally, AC-DC devices that handle large amounts of power generate heat, making it important to take heat dissipation measures, such as by implementing forced air cooling using an external fan.
When developing AC-DC power supplies, TDK-Lambda focused on SiC, which features higher heat resistance and greater efficiency than silicon under high power conditions. ROHM SiCs were selected due to their low V_F, excellent balance between I_FSM and recovery characteristics, and a comprehensive support system.
High efficiency operation allows ROHM’s onboard SiC SBDs to significantly contribute to the commercialization of the TDK-Lambda's first fanless, naturally air-cooled 600W AC-DC power supply.

<Customer Feedback>

Development Manager, Unit Power Supply Development Dept., Technology Management Div., TDK-Lambda Corp.

In addition to the difficulty of developing a fanless naturally air-cooled 600W power supply, the challenge was to target Class B of various EMI standards* by achieving superior noise characteristics with low loss.
ROHM SiC SBDs provided an excellent balance between recovery performance and low V_F that proved useful in solving this problem. Also, I believe the quick submission of samples contributed to smooth product development.

*Various EMI standards (EN55011/EN55032, FCC, VCCI)
There are two standards, Class A (for industrial equipment), and Class B (no usage restrictions) depending on the application, with Class B having more stringent requirements

Products Used

• SiC Schottky Barrier Diodes

Related Pages

• SiC Power Devices

About TDK-Lambda

TDK-Lambda Corp. (TDK Group)
Website：https://www.jp.lambda.tdk.com/en/

TDK-Lambda Corporation was established in Tokyo, Japan, in 2008. Founded through a merger with TDK’s power supply business, we now are a leading company in the manufacture of power supplies for industrial equipment.
Although there are several thousand power supply makers operating around the world, TDK-Lambda is the only one with a full-function setup embracing everything from development and manufacture to sales and maintenance. We have R&D sites in all five key areas of the world―Japan (Nagaoka, Niigata), China, Europe, the United States, and Asia. By taking account of the special characteristics of each area, TDK-Lambda meets the various power supply needs of our customers.

TDK-Lambda is the only power supply maker that has access to ferrite, which is used in the transformer of power supplies, and important constituent parts, such as inductors and capacitors, within its Group. This enables us to develop power supply products from the level of materials and components. In addition, TDK-Lambda develops innovative power supplies by utilizing core technologies nurtured so far, such as circuit design technology and thermal/electromagnetic field evaluation and simulation technology.