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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/gan-hemt-gate-driver-patent-landscape-patent-landscape/ · Patsnap · data cut-off 2026-08-31 · downloaded from the live page
Patent Landscape · Power ElectronicsGaN HEMT gate driver patents: who leads and where the claim space is still open
A patent landscape review of GaN HEMT gate driver technology: filing trends since 2017, assignee concentration, IPC composition, most-cited records and where claim space remains open.
526
Published Records
27%
Top-5 Share of All Records
+13%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth = 2021 (40 records) → 2024 (45); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 526 records in scope (CR5), not the ranked leaders only.
Published byPatsnap Research··6 min readSourced from Patsnap Eureka
Overview
What this landscape covers
GaN HEMT gate driver patents cover the circuits that turn a gallium-nitride high-electron-mobility transistor on and off cleanly at the switching speeds the device is built for. This is a narrower slice of GaN power electronics than the transistor itself: the claims here sit on bootstrap and charge-pump supplies, turn-on/turn-off resistor pairs, cascode switching arrangements, and protection circuits that sense overcurrent or short-circuit conditions fast enough to save a device with no thermal margin. 526 records are in scope, spanning filings from 2015 through the current data cut-off.
The dataset draws on IPC classes covering power conversion, pulse and logic circuitry, and semiconductor device structure, cross-referenced against gate-driver and GaN-specific search terms. It is a useful proxy for where design freedom is shrinking in GaN switching circuits, and where it is not.
Filing activity and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on GaN HEMT Gate Driver Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
The Data
Filing trend and technology composition
Two views of the same 526-record set: how filing activity has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2017-2026
Filings ran from 32 in 2017 to a peak of 79 in 2019, then settled into a lower but still active band; the 2021-2024 span shows +13% growth (40 to 45 records). 2025 and 2026 figures are partial because publication trails filing by roughly 18 months, so the recent-year dip should not be read as a slowdown.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
IPC composition (share of 526 records)
H03K (pulse technique and logic circuits) appears in 58.9% of records and H02M (power conversion) in 47.7%, confirming that gate-drive timing and signal-shaping claims outnumber power-stage claims. H01L and H10D semiconductor-device classes each cover a meaningful minority, and protection circuitry (H02H) and amplifiers (H03F) sit in the single digits — smaller but not negligible claim territory. Records can carry more than one class, so these shares add up to more than 100%.
Shares are the percentage of the 526 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on GaN HEMT Gate Driver Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.
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Representative filing and most-cited records
Representative filing
Gate drive circuit for power conversion apparatus (US9748949B1)
HELLA GMBH & CO. KGAA
The filing describes a gate drive circuit paired with a GaN HEMT switch, using separate turn-on and turn-off transistor paths (NPN/NMOS and PNP/PMOS) each with its own resistor, connected to the switch gate through a shared gate drive resistor.Filed by Hella; granted 2017-08-29.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20140300413A1 | Power transistor gate driver | 93 |
| 2 | US20160079785A1 | Bootstrap capacitor charging circuit for GAN devices | 74 |
| 3 | US9083343B1 | Cascode switching circuit | 74 |
| 4 | US20190140630A1 | GaN TRANSISTOR WITH INTEGRATED DRAIN VOLTAGE SENSE FOR FAST OVERCURRENT AND SHORT CIRCUIT PROTECTION | 66 |
| 5 | CN109951178A | 一种GaN栅驱动电路的系统保护方法 | 59 |
| 6 | US20140027785A1 | Cascoded semiconductor devices | 56 |
| 7 | US10217608B2 | Switching circuit for RF currents | 45 |
| 8 | US20180159529A1 | BOOTSTRAP CAPACITOR OVER-VOLTAGE MANAGEMENT CIRCUIT FOR GaN TRANSISTOR BASED POWER CONVERTERS | 43 |
| 9 | US20200052687A1 | Switch Bootstrap Charging Circuit Suitable for Gate Drive Circuit of GaN Power Device | 42 |
| 10 | CN111404529A | 一种耗尽型GaN功率器件的分段直接栅驱动电路 | 41 |
Citation counts reflect influence within the searched corpus and skew toward older filings; they are a signal of technical reference, not of current commercial weight.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on GaN HEMT Gate Driver Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for a filing decision
Four read-outs from the assignee, trend and IPC data that matter more than the raw counts on their own.
Concentration
27.4%
of 526 records held by top 5
The core gate-drive circuit is already claimed by a small group
Five assignees hold 144 of the 526 records in scope, and the leader alone holds 50. A new entrant working on bootstrap supply, cascode switching or basic turn-on/turn-off resistor topology is filing into dense prior art, not open ground.
Assignee ranking, 100 companies
Growth
+13%
2021 to 2024 (40 to 45 records)
Filing activity is still building, not cooling off
After peaking at 79 in 2019, annual filings settled lower but the 2021-2024 window shows real growth. Treat 2025-2026 counts as undercounts, not evidence of a slowdown, since publication lags filing by around 18 months.
Filing trend, 2017-2026
Technology mix
58.9%
of records carry H03K (pulse technique/logic)
Drive-signal shaping outweighs power-stage claims
H03K appears in more records than H02M (power conversion, 47.7%), meaning the busiest claim territory is how the gate signal itself is timed and shaped, not how the power path is built. Protection circuitry (H02H, 4.6%) and amplifier-adjacent claims (H03F, 4.4%) are comparatively thin.
IPC composition, 526 records
Geography
294
US-filed records, largest single office
Filing activity is heavily US-weighted with a real European footprint
The United States accounts for 294 records, well ahead of EPO filings at 82 and WIPO/PCT filings at 45; Germany and Austria together add a further block, consistent with the concentration of automotive and industrial power-electronics assignees filing there.
Receiving offices
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Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to gan hemt gate driver patent landscape, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on GaN HEMT Gate Driver Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this next
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, portfolio design, or tracking a competitor.
Map claim scope on the most-cited records
Start with the highest-cited filings in this set and read their independent claims against your own circuit topology before committing engineering time to a design.
Explore in Patsnap EurekaWatch the under-claimed protection and sensing branches
H02H and G01R appear in a small minority of records; fast fault-sensing and protection circuitry paired with GaN switching speed looks less crowded than the core drive circuit.
Run a white space search in Patsnap EurekaTrack the leader's filing cadence, not just its count
A 50-record leader is worth watching for filing velocity and geography, not just headline share, since that shows where its next enforcement priority likely sits.
Set up assignee tracking in Patsnap EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on GaN HEMT Gate Driver Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on GaN HEMT gate driver patents
The assignee ranking in this dataset covers 100 companies across 526 records, and it is led by a single company holding 50 records, well ahead of the fifth-ranked firm at 18. The top five assignees combined hold 144 records, or 27.4% of all records in scope, which shows real concentration at the top rather than a flat field. That said, the ranking still leaves a long tail of firms with only one or a handful of filings each, so the field is not closed to new entrants outside the core circuit topology.
Filings grew from 40 records in 2021 to 45 in 2024, a 13% increase over that span, and 2019 remains the peak year so far at 79 records. Counts for 2025 and 2026 look lower, but that reflects publication lag of roughly 18 months rather than an actual drop in filing activity. Treat any recent-year dip in the raw numbers as incomplete data, not a genuine slowdown.
H03K, covering pulse technique and logic circuitry, appears in 58.9% of the 526 records, ahead of H02M power conversion at 47.7%. This means most patent claims focus on how the gate drive signal itself is generated and timed, rather than on the power conversion stage around it. Semiconductor device structure classes (H01L, H10D) and protection circuitry (H02H) make up smaller but still relevant shares, since a record can be tagged with more than one class.
The IPC composition shows protective circuit arrangements (H02H, 4.6% of records), amplifier-related claims (H03F, 4.4%) and measurement circuitry (G01R, 3.2%) all sit far below the core drive-signal and power-conversion classes. That gap suggests fast fault detection, short-circuit sensing and measurement integration tied to GaN switching speed are comparatively under-claimed relative to the core gate-drive circuit topology, which is already dense with filings from the leading assignees.
US9748949B1, assigned to Hella and granted in 2017, describes a gate drive circuit for a GaN HEMT switch built from separate turn-on and turn-off transistor paths, each with its own resistor, feeding the switch gate through a shared gate drive resistor. It is a representative filing in this landscape because that split turn-on/turn-off resistor architecture is a common building block referenced across later filings in the space. Anyone designing a similar dual-path drive stage should read its claims closely before assuming the topology is open.
Answers are grounded in the same dataset. Derived from a Patsnap search on GaN HEMT Gate Driver Patent Landscape covering 2015–2026, data cut-off 2026-08-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company's registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.