REF3K3WHFHDPSUTOBO1: 3.3kW, 50V @ 66A, 180 ~ 275VAC

Summary

REF_3K3W_HFHD_PSU comprises a front-end AC-DC converter and a back-end isolated DC-DC converter. The AC-DC converter is an interleaved bridgeless totem-pole stage featuring two phases that provide power factor correction and limits total harmonic distortion. The back-end DC-DC is a GaN half-bridge LLC converter with fullbridge rectification. The back-end provides safety isolation and regulates the output voltage. The PSU also features a baby-boost converter to comply with the hold-up time specifications of server applications with a reduced overall bulk capacitance, increasing the overall power density.

The measured peak efficiency of the complete PSU at 230 VAC input line is 97.4 percent, not including the internal fan, and overall outer dimensions of 72 mm × 192 mm × 40 mm, yielding a 98 W/inch³ power density.

Summary of Features:

97.4% efficiency @ 98W/in³
High frequency GaN LLC design (500 kHz)
Fully integrated transformer structure
2-ph interleaved totem-pole SiC AC-DC
Digital control for both converters
Hold up time extension circuit

List of components:

IPT60R016CM8 – 600 V CoolMOS™ 8 power transistor (IPT60R016CM8)

600 V CoolMOS™ G7 SJ MOSFET (IPT60R080G7)

CoolSiC™ MOSFET 650 V (IMT65R057M1H)

CoolSiC™ Schottky diode G5 650 V (IDL10G65C5)

CoolGaN™ Transistor 650 V (IGT65R035D2)

OptiMOS™ 5 power MOSFET 80 V (IQE046N08LM5)

EiceDRIVER™ 2EDB dual-channel isolated gate driver IC (2EDB7259K)

EiceDRIVER™ 1EDN single-channel gate driver IC (1EDN8511B)

EiceDRIVER™ 1EDB single-channel isolated gate driver IC (1EDB8275F)

EiceDRIVER™ 2EDB dual-channel isolated gate driver IC (2EDB9259Y)

EiceDRIVER™ 1EDN TDI single-channel non-isolated gate driver IC with truly differential inputs (1EDN8550B)

CoolSET™ flyback controller with integrated 800 V CoolMOS™ (ICE2QR2280G)

Small-signal N-channel MOSFET (BSS138N)

ISOFACE™ quad-channel digital isolator (4DIR1400H)

OPTIREG™ Switcher (TLS4120D0EPV33)

Low Dropout Linear Voltage Regulator TLS820F3ELV33XUMA1

32-bit XMC4000 Industrial Microcontroller Arm® Cortex®-M4 (XMC4200-Q48K256)

Medium power AF Schottky diode (BAT165)

Specifications

Manufacturer	Infineon Technologies
Category	AC/DC and DC/DC Conversion
Sub-Category	AC/DC SMPS - Single Output
Eval Board Part Number	448-REF3K3WHFHDPSUTOBO1-ND
Eval Board Supplier	Infineon Technologies
Eval Board	Normally In Stock
AC Voltage	230 V 190 V 208 V
Outputs and Type	1 Isolated
Voltage Out	50 V
Current Out	66 A
Output Power	3300 W
Features	Over Current Protection Over Voltage Protection Under Voltage Protection, Brown-Out
Efficiency @ Conditions	>97%, 230V in, 50V @ 1,023 ~ 2,772 W (31~84% Full Load)
No-load Input Power @ Voltage	- Not Given
Switching Frequency	500 kHz
Internal Switch	No
Component Count + Extras	484 + 7
Voltage In	180 ~ 275 VAC
Design Author	Infineon Technologies
Application / Target Market	Distributed Power Systems Networking Power: Industrial Power Servers Telecom
Main I.C. Base Part	CYPD1120
Date Created By Author	2024-05
Date Added To Library	2025-01