Comparison: Infineon 1EDN7116UXTSA1 vs Allegro A89505KLPTR Gate Driver ICs
Quick verdict
For single high-side GaN or N-channel MOSFET gate driving up to 200 V bootstrap voltage, the Infineon 1EDN7116UXTSA1 is the more focused, specialized choice, offering a simpler solution when only one driver is needed. Conversely, the Allegro A89505KLPTR excels in full-bridge applications requiring two independent MOSFET drivers in a single package, especially in automotive-grade environments up to 50 V supply with AEC-Q100 qualification.
Spec comparison table
| Spec | 1EDN7116UXTSA1 | A89505KLPTR | Notes |
|---|---|---|---|
| Driven Configuration | High-Side | Full-Bridge | Full-bridge driver integrates two independent channels, suitable for H-bridge topologies; high-side only limits to half-bridge or single switches. |
| Gate Type | GaN FET, N-Channel MOSFET | N-Channel MOSFET | 1EDN7116UXTSA1 explicitly supports GaN, beneficial for wide-bandgap device driving. |
| High-Side Voltage Max Bootstrap | 200 V | 50 V | Higher bootstrap voltage on Infineon allows higher voltage rails or margin in high-voltage designs. |
| Number of Drivers | 1 | 2 | Dual drivers in Allegro enable full-bridge configurations without extra ICs, reducing BOM and board complexity. |
| Package Case | Not specified | 20-TSSOP (4.40 mm Width), Exposed Pad | Allegro provides detailed package info; exposed pad improves thermal dissipation. |
| Supplier Device Package | Not specified | 20-TSSOP-EP | Allegro’s exposed pad package enables better heat sinking compared to unknown Infineon package. |
| Input Type | Not specified | Non-Inverting | Allegro’s non-inverting input simplifies logic design; Infineon input polarity not stated. |
| Operating Temperature Range | Not specified | -40°C to 135°C (TA) | Allegro’s automotive-grade temp range supports harsher environments. |
| Grade / Qualification | Not specified | Automotive (AEC-Q100) | Allegro is qualified for automotive, key for reliability in demanding applications. |
| Mounting Type | Not specified | Surface Mount | Both are surface-mount; Allegro specified explicitly. |
| Programmability | Not Verified | Not Specified | Neither device is programmable, simplifying integration but limiting configurability. |
| Logic Voltage VIL/VIH | Not specified | Not specified | No data to compare input logic compatibility. |
| Current Peak Output Source/Sink | Not specified | Not specified | No current drive specs limit detailed gate drive strength comparison. |
| Rise/Fall Time Typical | Not specified | Not specified | No switching speed data to compare driver dynamic performance. |
| Voltage Supply | Not specified | 50 V | Allegro supports up to 50 V supply; Infineon supports bootstrap up to 200 V but supply range unknown. |
Design trade-offs
The primary functional difference between the 1EDN7116UXTSA1 and the A89505KLPTR is the targeted application topology: Infineon’s device is a single high-side driver optimized for GaN or N-channel MOSFETs, while Allegro’s device is a dual-driver intended for full-bridge MOSFET arrangements. If your design involves a simple half-bridge or a single high-side switch, the Infineon driver’s higher bootstrap voltage rating (200 V) offers greater voltage headroom and flexibility, especially for industrial or high-voltage GaN applications. The Allegro’s 50 V bootstrap limit restricts it to lower-voltage automotive or industrial levels.
Thermal considerations favor the Allegro A89505KLPTR due to its 20-TSSOP exposed-pad package, which provides a low thermal resistance path to the PCB. This becomes critical in full-bridge applications where both drivers may be switching high currents simultaneously. The Infineon’s package details are unspecified, which complicates thermal design and may require additional heatsinking or derating, especially at high switching frequencies or currents.
From a gate drive perspective, the explicit support for GaN devices in the Infineon IC is significant. GaN FETs typically require different gate drive voltage levels and have faster switching characteristics demanding precise driver timing and low output impedance. Although Allegro supports only N-channel MOSFETs, it does not claim GaN compatibility, making it less suitable for wide-bandgap semiconductors.
The Allegro device’s automotive qualification (AEC-Q100) and operating temperature range (-40°C to 135°C) make it a natural choice for automotive or harsh environment applications. The Infineon part lacks this grade and temperature data in the provided specs, implying it may be intended for industrial or commercial use rather than automotive.
Cost and BOM complexity will also be affected by topology support. Using the Allegro A89505KLPTR in full-bridge designs reduces component count and PCB space by integrating two drivers in one IC, while the Infineon requires multiple devices or a complementary low-side driver IC. Conversely, for simple high-side-only designs, the Infineon’s single-driver solution simplifies design and may reduce cost.
Use-case fit
Choose 1EDN7116UXTSA1 when…
- Designing a single high-side GaN FET driver stage in industrial power conversion up to 200 V.
- Your application requires driving wide-bandgap devices with gate voltages and switching speeds supported explicitly by the driver.
- The system voltage exceeds 50 V bootstrap limits, or you need extra margin for bootstrap voltage spikes.
- You want a simple, single-channel driver without the complexity or cost of a full-bridge driver IC.
- The operating environment is commercial or industrial, without AEC-Q100 qualification requirements.
Choose A89505KLPTR when…
- Implementing a full-bridge MOSFET driver stage requiring two independent switches in one package.
- Targeting automotive or harsh environments where AEC-Q100 qualification and extended temperature range (-40°C to 135°C) are mandatory.
- Operating at or below 50 V supply voltages typical of automotive or low-voltage industrial systems.
- Needing a package with exposed pad for improved thermal performance in compact layouts.
- Using non-inverting logic inputs for simpler interface to microcontrollers or gate drive logic.
Drop-in compatibility
Based on the available data, there is no indication that the 1EDN7116UXTSA1 and the A89505KLPTR are pin- or footprint-compatible. The Allegro part is a 20-pin TSSOP with an exposed pad, designed as a full-bridge dual driver, while the Infineon is a single high-side driver with unspecified package details. Substituting one for the other would require substantial PCB and schematic redesign, including power stage topology changes and logic interface updates. No direct drop-in replacement is possible.
Alternatives to consider
- Texas Instruments UCC37322 — High-speed dual MOSFET driver with 4 A source/sink current, suitable for full-bridge topologies with high transient current capability.
- Microchip MCP1407 — Single high-speed MOSFET driver IC with rail-to-rail output, useful for high-side or low-side discrete gate drive.
- Infineon 1EDN7527B — Integrated high-side driver optimized for GaN devices with similar bootstrap voltage capability, worth evaluating for GaN-specific applications.
This comparison highlights key trade-offs between a single high-side GaN driver and a dual full-bridge MOSFET driver for automotive-grade applications. Your choice depends heavily on topology, voltage levels, device type, and environmental requirements.