MOSFET and IGBT Gate Drivers, Isolated Boards and ICs

Gate drivers for MOSFET and IGBT switching: choose the right architecture

Explore discrete gate-driver ICs, optically isolated driver components, assembled DC-load MOSFET switching boards, multi-channel power-driver boards, a dedicated IGBT driver-module option and an auxiliary isolated DC-DC supply. These products are not interchangeable simply because their titles say “gate driver.” This collection includes both bare surface-mount or through-hole chips and ready-assembled boards, plus a power supply that is not itself a gate driver. Compare the selected model, package, quantity and intended switching topology before ordering.

First identify what you actually need

• Driver IC: translates a compatible controller signal into a gate-charge/discharge drive for separately selected external MOSFETs or IGBTs. An IC is not a power transistor, assembled switch or complete motor controller. The supply voltage, peak output current, timing, dead-time features, pinout and number of channels depend on the exact part.
• Low-side DC switching board: an assembled power MOSFET and input/control circuit switch an appropriate DC load at ground-referenced potential. FR120N, AOD4184 and LR7843 optocoupler-board selections are different power-transistor versions; IRF520 boards and 3.3V/5V six-channel boards are further distinct designs. They do not replace a bare gate-driver IC in a PCB footprint.
• High/low-side or three-phase driver: ICs such as IRS2186/IRS21867/IRS21834, IR2214SS, FAN7387, NSI6602A and FD6288 target different bridge or motor-stage arrangements. A three-phase driver and a low-side single-channel buffer do not offer the same outputs or operating topology.
• Optically isolated gate-drive component or board: TLP5754, ACPL-W340, TLP250H, HCPL-3120/3140/3150/3180 and FOD3120/3150/3184 options are individual optocoupler/gate-driver devices with different packages and characteristics. The 2SD106AI versus 2SD106AI-17 option and a separate four-channel IGBT/SiC board listing concern larger modules or boards, not equivalent DIP ICs. Isolation claims must be evaluated for the selected device and complete assembled system.
• Auxiliary driver supply: GD2-121515, GD2-151515 and GD2-241515 are selectable 2W SIP-format DC-DC converter inputs of 12V, 15V and 24V respectively as labeled. A converter can support a suitably designed gate-drive supply, but cannot turn a controller signal into an isolated gate-drive output on its own.

Which bare IC listings are here?

For low-side or ground-referenced drive, compare UCC27517DBVR single-channel SOT23-5 listings (one offers 50 to 1,000 pieces, another fixed ten pieces), MCP1407-E/SN surface-mount SOP-8 with one to 100 pieces, IXDN604PI versus IXDD604PI five-piece DIP-8 variants, MC33153P DIP-8 in ten- or thirty-piece packs, and TC4424CPA, TC4424EPA or TC426CPA ten-piece DIP-8 selections. These are separate part numbers. Check inverting versus non-inverting output behavior, number of channels, logic-input thresholds, supply, output current, thermal performance and exact footprint in each device datasheet. “6A” on an MCP1407 headline or a peak-drive rating elsewhere is not a continuous load-current rating.

For more complex power stages, individual selections include NSI6602A-DSWR SOIC-16 half-bridge driver in one/five/ten-piece options; IRS2186STRPBF and IRS21867STRPBF two-piece options; a separate ten-piece page with IRS2186STRPBF, IRS21834STRPBF or IRS21867STRPBF options; IR2214SS SSOP-24; FD6288/FD6288T TSSOP-20 in five or ten pieces; FAN7387MX SOP-8; IR2133J PLCC-44 in a five-piece listing; and UCC21220DR with ten, fifty or 100 pieces. A title combining several device numbers does not mean one package contains every model. Compare bootstrap/high-side requirements, supply domains, isolation, output polarity, channel layout and propagation timing from the chosen device documentation. Do not treat a “600V” or “250V” headline as permission to connect that voltage to logic pins or as a universal rating for all components in this collection.

Additional standalone parts include NCP5901BMNTBG DFN-8 in ten/twenty/fifty-piece choices, SGM48013XN5G/TR SOT23-5 in one-, five- and larger bulk packs, EG3116D SOP-8 in two separate ten-piece listings, EG3112 SOP-8, and 1ED020I12FTA in five/twenty-piece options. Some source titles mention device markings, console-repair use or “compatible” chips: confirm exact marking, manufacturer order code, pin map and operating limits before using any item as a repair replacement. A supplier's “original,” “new,” or certification claim in inherited product text is not independent verification for the lot received.

Assembled switching boards: inspect the actual variant

The optocoupled FR120N/AOD4184/LR7843 module appears twice with differently ordered options. Variant labels state “FR120N - 100V 9.4A,” “AOD4184 - 40V 50A” or “LR7843 - 30V 161A.” These numbers are seller labels for different transistors, not verified continuous current ratings for either assembled PCB, its terminals or cooling. The included description says 3V/5V control and PWM input; nevertheless check how the specific board powers its input and output sides, whether isolation is preserved with your wiring, output polarity, allowable load voltage, connector capacity and heat sinking. “Relay replacement” refers to an application idea, not electrical or safety equivalence to a relay.

An IRF520 module listing has 1, 5, 10 or 20 board options and quotes 0–24V loads, under 5A, and heatsinking above 1A. Its “logic-level” headline is not proof that an IRF520 reaches suitably low on-resistance with a particular 3.3V MCU; check actual gate drive and power loss before selecting for Raspberry Pi or another controller. The six-channel optocoupler board has 5V and 3.3V input variants, with an indicator LED on the 5V version according to its listing. Six independently switched low-side DC channels are not the same as a three-phase bridge, six isolated high-side drivers or a board that powers six motors without additional design checks. PWM support depends on the board and load's actual switching limits.

Isolation and IGBT/SiC selections

Optocoupler-driver options differ substantially in output capability, speed, isolation test rating, common-mode behavior, package and power requirements. The HCPL listing offers A3120, A3140, A3150 and A3180 as separate five-piece selections. Another listing offers FOD3184, FOD3120 or FOD3150 in a 20-piece headline and marks its product condition “Used”; check actual condition before procurement. TLP250H has five-, ten- and twenty-piece DIP-8 packs, while TLP5754 is a ten-piece SOIC-6 listing and ACPL-W340-500E a ten-piece SOIC-6 listing. Even where a supplier description quotes a voltage-isolation figure or CMR value, use the exact manufacturer's datasheet, package creepage/clearance and applicable system design rules; a component rating does not certify the finished equipment.

The 2SD106AI and 2SD106AI-17 are explicit alternative variants on one IGBT module page. Another multi-channel board has only “type 1,” “type 2” and “type 3” selections without enough specification to identify its exact configuration; request the board diagram, channel count, supply requirements and included accessories for the chosen type. The GD2 isolated-power listings select input voltage by full model code; also verify the individual converter's output configuration, isolation and load regulation instead of inferring them from “15 15” in a name. None of these items automatically creates a complete, safety-approved inverter.

Selection checklist for an actual power stage

1. Load and topology: specify MOSFET versus IGBT (or documented SiC compatibility), low-side versus high-side, half-bridge versus three-phase, and the number of independent gates. Never infer topology from a generic “driver” title.
2. Signal and supply domains: check controller logic thresholds, driver VCC and any separate gate-bias supply. Isolation requires proper power-domain separation as well as an isolating signal path; an optocoupler on a board does not guarantee whole-system isolation after installation.
3. Gate-charge and timing: match the switch's total gate charge and recommended gate voltage against driver peak source/sink capability, repetition rate, propagation delay and required dead time. A peak gate-current specification is not load-current capacity.
4. PCB and package: compare DIP-8, SOT23-5, DFN-8, SOP-8, SOIC-6/16, SSOP-24, TSSOP-20 or PLCC-44 footprints, thermal paths and pin-1 orientation. A bare IC, optocoupler, SIP converter and populated board require very different assembly.
5. Board-level operating limits: check terminal/connectors, transistor safe operating area, inductive-load handling, thermal dissipation and wiring against the actual board and load. A headline transistor-current figure is not an assembled-module continuous rating.
6. Selected option and pack: confirm model suffix and quantity, especially multi-model titles, bulk 50–3,000-piece selections and ambiguous board “type” variants. Individual choices are alternatives, not a mixed selection of everything in the title.
7. Safety review: for high-energy, high-voltage or motor-drive work, use the exact datasheets and an appropriately qualified design review of insulation, fault behavior, cooling and protection. This collection overview deliberately does not prescribe one universal hazardous-circuit wiring recipe.

Buy by the selected option and its verified electrical documentation, not by shared search words. This collection preserves a broad selection of chips, assembled switches, isolated components, modules and supporting supplies so you can compare the correct building block for the power architecture you are designing.