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Texas Instruments LMG3522R030 | Demoboard PMP41078
High-voltage to low-voltage DC-DC converter reference design with GaN HEMT
Overview
| Topology | Half-Bridge Converter symmetrical isolated |
| Input voltage | 200-450 V |
| Output 1 | 16 V / 250 A |
| IC revision | 1 |
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 100kHz
- 95.48% at 200kHz, 400V Vin, 13.5V Vout, about 1kW
- Dual active clamping circuits for high-frequency scenario and low synchronous rectifier (SR) MOSFET voltage stress
- Light load efficiency optimization promotes maximum 5% efficiency
Typical applications
- Automotive DCDC converter
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | VT (V (AC)) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC typ. (mΩ) | RDC max. (mΩ) | Mount | VIN | VOut1 (V (DC)) | IOut1 (mA) | Type of Insulation | fswitch (kHz) | ∫Udt (Vµs) | NPRI : NSEC | L (mm) | W (mm) | H (mm) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744316220 | SPEC | 9 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 | ||
 | 74439346047 | SPEC | 9 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 | ||
 | 750319691 | SPEC | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PPTI Push-Pull Transformers | 100 | 2500 | – | – | – | – | – | – | – | – | SMT | 12 V (DC) | 12 | 500 | Functional | 400 - 600 | 18 | 1:1.14 | 8.5 | 13.12 | 5.5 | |
 | 760390014 | SPEC PCN pendingDue 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. | – | 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 | |
|---|---|---|---|
| 744316220 | SPEC | |
| 74439346047 | SPEC | |
| 750319691 | SPEC | – |
| 760390014 | SPEC PCN pendingDue 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. | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | VT (V (AC)) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC typ. (mΩ) | RDC max. (mΩ) | Mount | VIN | VOut1 (V (DC)) | IOut1 (mA) | Type of Insulation | fswitch (kHz) | ∫Udt (Vµs) | NPRI : NSEC | L (mm) | W (mm) | H (mm) | Samples |
|---|
