FAN7392MX - 600V 3A Half-Bridge Gate Driver | onsemi
MPN: FAN7392MX ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.47 | $147.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.16 | $1,160.00 |
FAN7392MX Overview
A half-bridge gate driver is a specialized power-management IC that converts low-power PWM control signals from a microcontroller into the high-current, high-voltage drive signals needed to switch the high-side and low-side MOSFETs/IGBTs of a half-bridge or full-bridge power stage. It belongs to the broader gate-driver family, which sits hierarchically under power management ICs, motor drivers, and switching-converter support circuitry. By floating the high-side channel up to 625V and using level-shifting techniques, the FAN7392MX allows a low-voltage controller to command the high-side switch safely above the bus rail.
Key features include 3A/3A source/sink drive current, 600V high-side floating supply range, built-in bootstrap diode for the high-side supply, SD (shutdown) input for fault protection, 3.3V/5V logic-compatible inputs (VIH=9.5V max, VIL=4.5V min are the VDD-referenced thresholds), matched propagation delays between the two channels to minimize duty-cycle distortion, and under-voltage lockout (UVLO) for both VDD and VB rails. The buffered all-NMOS output stage minimizes cross-conduction and provides clean gate edges even at high dV/dt. Common-mode noise cancellation from onsemi's high-voltage process keeps the high-side channel stable in noisy switching environments, with a typical dV/dt immunity of 50 V/ns.
Typical applications include motor-drive inverters (BLDC/PMSM), switching-mode power supplies (SMPS) using half- or full-bridge topologies, high-power DC-DC converters, uninterruptible power supplies (UPS), induction-heating converters, and lighting ballasts. The wide logic-input range also makes it a drop-in driver for 3.3V MCUs where many older half-bridge drivers required 5V or 12V logic. Compared with discrete bootstrapped gate-drive circuits, the FAN7392MX reduces BOM count, PCB area, and design risk.
When designing with the FAN7392MX, observe the bootstrap-capacitor sizing rule of thumb (CBoot ≥ 10× CGE of the driven MOSFET), place VDD bypass capacitors as close to the IC as possible, and respect the minimum pulse-width spec to avoid bootstrap-cap droop. Verify that the chosen switching frequency and high-side duty cycle do not exceed the bootstrap refresh interval.
Drop-in alternatives for FAN7392MX — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with FAN7392MX (same form factor and footprint) — differing in Mounting Type, Operating Temperature Range, Package, Propagation Delay (typ).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
FAN73912MX
✅ Drop-In📋 Reference alternative (not in catalog)
FAN7382M1X
✅ Drop-In📋 Reference alternative (not in catalog)
FAN7392
✅ Drop-In✓ In Stock
$0.88 / Unit
View Datasheet →FAN7392MX Maximum Ratings & Electrical Characteristics
| Driver Type | Half-Bridge (high-side + low-side) |
| Number of Drivers | 2 |
| Channel Type | Independent |
| Driven Configuration | Half-Bridge |
| Gate Type | IGBT, N-Channel MOSFET |
| Input Type | Non-Inverting |
| High-Side Floating Supply Voltage | up to 625 V (600V operating) |
| Logic Voltage VIL / VIH | 4.5 V / 9.5 V (relative to VDD) |
| Logic Compatibility | 3.3V / 5V input |
| Supply Voltage VDD | 10 V to 20 V |
| Peak Output Current (Source / Sink) | 3 A / 3 A |
| Bootstrap Diode | Integrated |
| SD (Shutdown) Pin | Yes |
| UVLO | VDD and VBS under-voltage lockout |
| Operating Temperature | -40C to +125C |
| Package | 16-SOIC (M1X suffix, wide-body) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
FAN7392MX Pin Configuration
| Pin 1 | VDD — Logic supply input (10V to 20V) |
| Pin 2 | HIN — High-side logic input (non-inverting) |
| Pin 3 | LIN — Low-side logic input (non-inverting) |
| Pin 4 | SD — Shutdown input (active) |
| Pin 5 | GND — Logic and low-side gate-drive ground |
| Pin 6 | LO — Low-side gate-drive output |
| Pin 7 | VS — High-side floating supply return (switch node) |
| Pin 8 | HO — High-side gate-drive output |
| Pin 9 | VB — High-side floating supply |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Typical Applications
FAN7392MX is suitable for 6 applications: 3-Phase BLDC / PMSM Motor Drives, Switching-Mode Power Supplies (Half / Full-Bridge), Uninterruptible Power Supplies (UPS), Induction Heating Cooktops, Solar Inverters and PFC Stages, HID and Industrial Lighting Ballasts.
3-Phase BLDC / PMSM Motor Drives
The FAN7392MX is widely used as the half-bridge gate driver in 3-phase brushless DC and permanent-magnet synchronous motor drives for industrial servo, e-bike, and appliance applications. Its 600V high-side floating supply comfortably covers 220V AC rectified (~310V DC) and 380V AC rectified (~540V DC) bus voltages, and the 3A/3A drive current switches most TO-220/TO-247 IGBTs and 600V MOSFETs without an external gate-drive buffer. The integrated bootstrap diode cuts BOM count per phase to one ceramic capacitor, while SD protection lets the MCU shut the inverter down within microseconds on a fault. Three FAN7392MX devices drive a full 6-switch inverter from a single 3.3V MCU such as the STM32F4 or TI C2000.
Recommended
Switching-Mode Power Supplies (Half / Full-Bridge)
In half-bridge and full-bridge SMPS topologies, the FAN7392MX drives the primary-side MOSFETs of telecom, server, and industrial 48V-input power converters. Its 600V rating handles 380V PFC output rails directly, and 3A peak current switches high-Qg planar MOSFETs at 100–300 kHz without an external buffer. The SD input can be tied to the PFC controller's fault output for synchronous shutdown, while UVLO on both VDD and VBS ensures safe startup sequencing. Two FAN7392MX parts drive a full-bridge primary stage, or a single part drives the primary half-bridge of a 1–2 kW LLC converter.
Recommended
Uninterruptible Power Supplies (UPS)
UPS systems rely on the FAN7392MX to drive the inverter stage that converts DC battery voltage back into clean AC mains for critical loads. The driver's 600V floating rail accommodates the 400V DC link from a battery stack, while the 3.3V logic interface connects directly to the UPS digital controller (often a dsPIC or TI C2000). The SD pin allows fast inverter shutdown on output over-current or short-circuit, protecting downstream batteries and transformers. Its -40C to +125C operating range meets the environmental demands of industrial UPS installations.
Recommended
Induction Heating Cooktops
Residential and commercial induction-heating cooktops use the FAN7392MX to drive the resonant half-bridge that excites the induction coil at 20–50 kHz. The driver's 3A/3A peak output easily switches the high-current IGBTs or MOSFETs used in induction-heating tank circuits, while the integrated bootstrap diode reduces BOM count — important in the cost-sensitive appliance market. The wide-body 16-SOIC package handles the thermal load of continuous resonant switching, and SD protection allows immediate shutdown if pan-presence detection or over-temperature sensors trip. The 3.3V logic input works seamlessly with modern cooktop MCUs.
Recommended
Solar Inverters and PFC Stages
In string solar inverters and active-PFC front ends, the FAN7392MX drives the boost-PFC MOSFETs or the half-bridge of the inverter stage at up to 600V bus. Its 3.3V logic compatibility simplifies direct interface to Microchip dsPIC and TI C2000 MPPT controllers, while 3A peak drive handles 600V-class SiC or super-junction MOSFETs used in next-generation solar converters. The SD input enables rapid inverter shutdown on grid-fault or over-current conditions required by grid-tie codes, and the wide -40 to +125°C operating range supports outdoor enclosure installations.
Recommended
HID and Industrial Lighting Ballasts
High-intensity-discharge (HID) and high-bay industrial-lighting ballasts use the FAN7392MX to drive the half-bridge resonant inverter that strikes and sustains the arc lamp. The driver's 600V rating covers PFC-output voltage in electronic ballasts, and 3A drive current switches the IGBTs used at typical 30–100 kHz operating frequencies. The integrated bootstrap diode and SD pin shrink the ballast PCB footprint while supporting safety shutdown when the lamp fails or is removed. Automotive-grade lighting applications can use the AEC-Q100-qualified FAN7392 derivative.
Recommended
Recommended Products Summary
Engineering reference data for FAN7392MX — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | FAN73912MX | FAN7382M1X | FAN7392 |
|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi |
| Package | 16-SOIC (wide-body, M1X) | 16-SOIC (wide-body, M1X) - same | 16-SOIC (wide-body, M1X) - same | 16-SOIC (wide-body) - same |
| High-Side Floating Supply | 600V (625V max) | 600V-class | 200V-class (lower) | 600V (same) |
| Peak Source / Sink Current | 3A / 3A | 3A / 3A | 350mA / 650mA (lower) | 3A / 3A |
| Logic Compatibility | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V | 3.3V / 5V |
| Integrated Bootstrap Diode | Yes | Yes | Yes | Yes |
| SD (Shutdown) Pin | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Lifecycle Status | Last Time Buy | Active (modern replacement) | Active | Last Time Buy |
Key Differentiators
- Integrated bootstrap diode (vs FAN7382M1X)
- 3A/3A peak gate-drive current (vs FAN7382M1X)
- 600V high-side floating supply rating (vs FAN7382M1X)
- Last-time-buy lifecycle (vs FAN73912MX)
Design Notes
Bootstrap-capacitor sizing is critical when using the FAN7392MX. The general rule of thumb is CBOOT ≥ 10× CGE of the driven MOSFET, where CGE is the gate-to-emitter (or gate-to-source) capacitance. Insufficient capacitance causes VBS droop and high-side UVLO tripping at high duty cycles. Estimated: for a typical 600V/40A IGBT with CGE ≈ 2 nF, choose a 22 nF–47 nF ceramic X7R bootstrap capacitor. Add a small series resistor (3–10 Ω) between HO and the gate if ringing is observed on the gate-source waveform.
Place a 0.1 µF ceramic bypass capacitor directly across the FAN7392MX's VDD-to-GND pins, plus a larger 1–10 µF bulk capacitor on the same rail within 5 mm. Keep the high-side floating traces (VB, VS, HO) short and isolated from the low-side logic traces (HIN, LIN, SD) to avoid coupling. Connect the IC's GND pin directly to the analog/control ground plane before the power ground returns to the source of the low-side MOSFET; this prevents ground bounce from corrupting the SD and logic thresholds.
Although the FAN7392MX delivers 3A peak drive current, the average power dissipation is set by Qg × VDD × fSW (gate charge × supply voltage × switching frequency). Estimated: driving a 100 nC total-charge MOSFET at VDD=15V and 100 kHz consumes P = 100 nC × 15V × 100 kHz = 0.15 W per channel, easily handled by the 16-SOIC wide-body package at room temperature. For continuous operation above 200 kHz with Qg > 200 nC, verify that the PCB copper-pour area keeps junction temperature below 125C by measuring theta-JA on the actual board.
Do not leave the SD (shutdown) pin floating on the FAN7392MX; per the onsemi datasheet the SD pin must be tied high (VDD) for normal operation, or controlled by the MCU for fault shutdown. A floating SD pin can drift into the indeterminate region and randomly disable the driver. Also, do not exceed the absolute maximum VBS-VS rating of 25V (bootstrap voltage); size the bootstrap supply resistor or use the integrated diode's forward drop to stay below this limit at all temperatures. Finally, avoid routing the high-side switching node (VS) under the IC body — use a wide copper pour with proper creepage per IPC-2221 for 600V-class designs.
Compliance Information
RoHS compliant per onsemi product page. Automotive-grade variants may carry the -Q1 suffix; the FAN7392MX base part is industrial-grade. Last-time-buy status confirmed via DigiKey listing on 2026-10-08.
