IC manufacturers Texas Instruments

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Texas Instruments LMG3522R030 | Demoboard PMP41078

High-voltage to low-voltage DC-DC converter reference design with GaN HEMT

Overview

TopologyHalf-Bridge Converter symmetrical isolated
Input voltage200-450 V
Output 116 V / 250 A
IC revision1

Description

This reference design describes a 3.5kW highvoltage to low-voltage DC-DC converter with 650V Gallium nitride (GaN) high-electron mobility transistors (HEMT). Using LMG3522R030 as primary switches makes the converter work at a high switching frequency. In this design, the converter uses a smaller size transformer. To ease the thermal performance of active clamping metal-oxide semiconductor fieldeffect transistors (MOSFETs), the converter uses twochannel active clamping circuits.

Features

GaN based phase-shifted full-bridge (PSFB) using LMG3522 and controlled using C29 microcontroller unit (MCU)200kHz switching frequency, magnetic size is 35% less than 100kHz95.48% at 200kHz, 400V Vin, 13.5V Vout, about 1kWDual active clamping circuits for high-frequency scenario and low synchronous rectifier (SR) MOSFET voltage stressLight load efficiency optimization promotes maximum 5% efficiency

Typical applications

  • Automotive DCDC converter

More information

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
VT
(V (AC))
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
MaterialRDC typ.
(mΩ)
RDC max.
(mΩ)
MountVINVOut1
(V (DC))
IOut1
(mA)
Type of Insulationfswitch
(kHz)
∫Udt
(Vµs)
NPRI : NSECL
(mm)
W
(mm)
H
(mm)
Samples
744316220SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-HCI SMT Flat Wire High Current Inductor 2.2 9.2 3.5 7.5 11.3 108 Superflux 12.43 SMT 5.5 5.3 4
74439346047SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-XHMI SMT Power Inductor 4.7 9.6 6.5 13 13 28 13 14.3 SMT 6.65 6.45 6.1
750319691SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. Push-Pull Transformer 100 2500 SMT 12 V (DC) 12 500 Functional 400 - 600 23 1:1.14 8.5 13.12 5.5
760390014SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WE-PPTI Push-Pull Transformers 475 2500 SMT 5 V (DC) 5 600 Functional 300 - 620 11 1:1.3 6.73 10.2 4.19
Order Code Data­sheet Simu­lation
744316220SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

74439346047SPEC
750319691SPEC
760390014SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
VT
(V (AC))
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
MaterialRDC typ.
(mΩ)
RDC max.
(mΩ)
MountVINVOut1
(V (DC))
IOut1
(mA)
Type of Insulationfswitch
(kHz)
∫Udt
(Vµs)
NPRI : NSECL
(mm)
W
(mm)
H
(mm)
Samples