Data Center GaN Applications: AC/DC Power Conversion

AC/DC Power Conversion
GaN Increases Power Density and Lowers Cost

The data-driven world of cloud computing, wearables, machine learning, autonomous driving, and IoT is placing greater demands on data centers and power consumption. GaN FETs emerge as the solution for ultra-high efficiency power factor correction (PFC) rectifier designs, addressing the crucial factors of efficiency, power density, and cost in AC to DC switching power supplies.

In data center power supplies, Totem Pole PFC becomes a popular choice due to the Titanium 80+ efficiency requirements and the growing need for high power density. GaN technology's fast-switching capability enables higher power density while maintaining efficiency in PFC designs.

For the DC-DC stage following the PFC that converts the 400 V bus voltage to 48 V or 12 V, GaN FETs and ICs offer improved efficiency and reduced size. GaN FETs parallel better than their silicon counterparts for higher power and reliability. GaN FETs and ICs also offer outstanding thermal performance. GaN FETs excel in synchronous rectification circuits on the secondary side, offering:

  • Lower gate driver and conduction losses.
  • Zero reverse recovery (QRR).
  • Higher switching frequency.
  • Remarkable compactness, up to 1/15th the size of MOSFET solutions.
GaN DC-DC Data Center

Reference Designs

Data Center AC/DC Reference Designs

  Part Number Description VIN VOUT lOUT
(A)
FSW
(kHz)
Featured Product  
PMP20978 Demonstration Board
PMP20978 1 kW Resonant Converter with GaN Sync Rectification 390 V 48 V 21 A   EPC2033 Contact TI

EPC’s application team is constantly working on new reference designs. If there is a requirement not met by the listed boards, please contact us via Ask a GaN Expert to discuss your application further or visit our forum to share your questions with other engineers.

Half-bridge development boards are available for quick evaluation of most eGaN FETs and ICs.

Products

Recommended Devices for Data Center AC/DC Conversion

Part Number Status Configuration VDS
max
VGS
max
max
RDS(on)
(mΩ)
@5VGS
QG
typ
(nC)
QGS
typ
(nC)
QGD
typ
(nC)
QOSS
typ
(nC)
ID (A) Pulsed ID
(A)
Package
(mm)
EPC2055 Preferred Single 40 6 3.6 6.6 2.3 0.7 13 29 161 LGA 2.5 x 1.5 Buy Now
EPC2069 Preferred Single 40 6 2.25 12.5 3.9 2.4 32 80 422 LGA 3.25 x 3.25 Buy Now
EPC2067 Preferred Single 40 6 1.55 17.1 5.3 2 37 69 409 LGA 3.25 x 2.85 Buy Now
EPC2066 Preferred Single 40 6 1.1 25 8.9 3.2 59 90 639 LGA 6.05 x 2.3 Buy Now
EPC2206 Preferred Single AEC 80 6 2.2 15 4.1 3 72 90 390 LGA 6.05 x 2.3 Buy Now
EPC2044 Preferred Single 100 6 10.5 4.3 1.3 0.5 15 9.4 89 BGA 2.15 x 1.25 Buy Now
EPC2204 Preferred Single 100 6 6 5.7 1.8 0.8 25 29 125 LGA 2.5 x 1.5 Buy Now
EPC2088 Preferred Single 100 6 3.2 12.5 4.4 1.4 47 60 231 LGA 3.5 x 1.95 Buy Now
EPC2308 Engr Single 150 6 6 10.6 3.8 1.4 50 48 157 QFN 3 x 5 Buy Now
EPC2059 Preferred Single 170 6 9 5.7 1.3 0.9 35 24 102 LGA 2.8 x 1.4 Buy Now
EPC2207 Preferred Single 200 6 22 4.5 1.3 0.7 23 14 54 LGA 2.8 x 0.925 Buy Now
EPC2307 Engr Single 200 6 10 10.6 3.8 1.3 58 48 130 QFN 3 x 5 Buy Now
EPC2215 Preferred Single 200 6 8 13.6 3.3 2.1 69 32 162 LGA 4.6 x 1.6 Buy Now
EPC2304 Engr Single 200 6 5 21 7.5 2.6 115 102 260 QFN 3 x 5 Buy Now
EPC2050 Preferred Single 350 6 80 2.9 1.3 0.3 35 6.3 26 BGA 1.95 x 1.95 Buy Now
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