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Vishay Semiconductor Opto Division VOFD343A-X018T
- Part No.:
- VOFD343A-X018T
- Manufacturer:
- Vishay Semiconductor Opto Division
- Category:
- Isolators - Gate Drivers
- Package:
- 6-SOIC (0.268", 6.80mm Width)
- Datasheet:
-
VOFD343A-X018T.pdf
- Description:
- SMD-6 IGBT MOSFET DRIVER 4A
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
VOFD343A-X018T from Vishay Semiconductors is a 4 A output current IGBT and MOSFET gate driver optocoupler with rail-to-rail output stage, 35 kV/μs common mode rejection, and -40 °C to +125 °C operating range. It directly drives IGBTs up to 1200 V / 100 A in motor control inverters and industrial UPS systems.
For engineers reviewing the VOFD343A-X018T datasheet, VOFD343A-X018T pinout, VOFD343A-X018T application, or VOFD343A-X018T equivalent, key selection criteria include peak output current (4.0 A), propagation delay (≤200 ns), UVLO thresholds (11.0–13.5 V), and stretched SO-6 package with VDE certification.
Technical Context
The VOFD343A-X018T integrates an AlGaAs LED optically coupled to a high-voltage IC output stage capable of 15 V to 30 V supply operation. Its rail-to-rail output delivers ±4.0 A peak current with <70 ns pulse width distortion and ≤100 ns propagation delay difference between channels.
It features dual UVLO (11.2 V turn-on / 11.2 V turn-off typical) and achieves 35 kV/μs CMR at both high- and low-level output states under 1500 V common-mode transients. The device meets DIN EN 60747-5-5 (VDE 0884-5) with option 1 certification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A - sufficient to directly drive 1200 V / 100 A IGBT gates without external buffer |
| Propagation Delay | ≤200 ns - enables high-frequency switching up to 75 kHz in inverter applications |
| Common Mode Rejection | 35 kV/μs - maintains signal integrity in noisy high-dv/dt motor drive environments |
| Supply Voltage Range | 15 V to 30 V - supports wide-range isolated power supplies for gate driver biasing |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| UVLO Threshold | 11.0–13.5 V (rising), 9.5–12.0 V (falling) - prevents erroneous gate turn-on during brown-out |
| Isolation Voltage | 6000 VPEAK (VDE option 1) - meets reinforced insulation requirements for industrial safety standards |
Pinout & Package
VOFD343A-X018T uses a stretched SO-6 (option 8) surface-mount package with 8 mm creepage and clearance distances, 0.4 mm minimum insulation thickness, and VDE-certified isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | LED input anode | Accepts 8–16 mA forward current to trigger output stage |
| 2 (Cathode) | LED input cathode | Completes LED circuit; referenced to VEE for logic-level compatibility |
| 3 (VEE) | Negative output supply | Serves as low-side reference; supports negative gate drive capability |
| 4 (Shield) | Internal isolation shield | Connected to VEE externally to suppress capacitive coupling and improve CMR |
| 5 (VO) | Power output terminal | Delivers rail-to-rail gate drive voltage (VCC to VEE) with ±4 A peak sourcing/sinking |
| 6 (VCC) | Positive output supply | Provides high-side bias; must be ≥15 V for reliable UVLO operation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Enables full utilization of gate drive voltage swing (VCC to VEE), minimizing conduction losses in IGBT/MOSFET switches |
| Dual UVLO with hysteresis | 1.5 V hysteresis prevents oscillation during supply ramp-up/down; ensures clean gate turn-on only above safe threshold |
| 35 kV/μs CMR at both logic states | Maintains output stability during fast dv/dt transients across isolation barrier in inverter bridge legs |
| Stretched SO-6 with VDE certification | Meets DIN EN 60747-5-5 for reinforced insulation, enabling use in safety-critical industrial and grid-connected equipment |
| Extended temperature operation | Guaranteed performance from -40 °C to +125 °C junction temperature, supporting compact heatsink-less designs |
Applications
| AC Motor Drives | Induction Cooktops |
|---|---|
Use Scenario: Driving IGBT half-bridge in variable-frequency AC motor inverters for HVAC and industrial pumps. IC Role / Device Role / Timing Role: Isolated gate driver providing timing-controlled high- and low-side switching with precise dead-time margin. Use Value: 200 ns max propagation delay ensures tight timing control; 35 kV/μs CMR prevents false triggering during bus voltage transitions. | Use Scenario: Controlling resonant IGBTs in induction heating circuits with rapid on/off cycling. IC Role / Device Role / Timing Role: High-current gate driver delivering 4 A peak to charge/discharge IGBT gates within nanosecond timing windows. Use Value: 4.0 A peak output current enables direct drive of high-Ciss IGBTs; rail-to-rail VO supports efficient zero-voltage switching. |
| Industrial UPS Systems | Brushless DC Motor Controllers |
Use Scenario: Gate driving in bidirectional DC-AC inverter stages of online UPS units handling 3–10 kVA loads. IC Role / Device Role / Timing Role: Reinforced-isolation driver ensuring functional safety during mains failure and battery backup transitions. Use Value: 6000 VPEAK VDE-rated isolation meets IEC 62040-1 for UPS safety; -40 °C to +125 °C rating supports wide ambient operation. | Use Scenario: Six-step commutation control in servo-grade BLDC motors used in robotics and CNC spindles. IC Role / Device Role / Timing Role: Synchronized gate driver delivering matched propagation delays (<100 ns skew) across three half-bridges. Use Value: ≤100 ns propagation delay difference minimizes phase current imbalance; 75 kHz max frequency supports high-speed commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar IGBT/MOSFET gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si827x series (Silicon Labs) | Digital isolator-based driver; 4 A peak, but requires external gate resistor network for slew rate control | Lacks integrated UVLO; needs external monitoring circuitry for supply fault detection | Preferred where digital control interface and programmable delay are required; not drop-in for analog opto-driven layouts |
| HCPL-316J (Broadcom) | Optocoupler-based; 2.5 A peak output, 500 ns max propagation delay, no VDE certification | Lower CMR (15 kV/μs); rated only to 125 °C ambient, not junction | Suitable for cost-sensitive, lower-power (<5 kW) inverters where VDE compliance is not mandated |
Compared with Si827x and HCPL-316J, the VOFD343A-X018T provides higher peak current, tighter propagation delay matching, integrated VDE-certified isolation, and built-in UVLO-making it optimal for high-reliability 1200 V IGBT systems requiring minimal external components.
Availability
VOFD343A-X018T is available at Aetrix Electronics and suitable for industrial inverters, uninterruptible power supplies (UPS), and induction cooking systems requiring stable component supply and long-term lifecycle support.
Supply support for VOFD343A-X018T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, optoelectronics, and passive devices with emphasis on reliability and high-performance specifications.
The VOFD343A product line is designed specifically for high-voltage, high-noise industrial gate driving applications-delivering robust optical isolation, high peak current, and extended temperature operation in compact stretched SO-6 packages.
FAQ
What is the isolation rating of the VOFD343A-X018T?
The VOFD343A-X018T carries VDE certification per DIN EN 60747-5-5 (option 1), with 6000 VPEAK transient isolation voltage and 891 VPEAK repetitive peak isolation voltage. Its 8 mm creepage and clearance distances and 0.4 mm minimum insulation thickness meet reinforced insulation requirements for industrial safety standards.
Does the VOFD343A-X018T support negative gate drive?
Yes, the VOFD343A-X018T supports negative gate drive via its dedicated VEE pin (Pin 3), which serves as the negative output supply reference. When VEE is biased below ground (e.g., -5 V), the rail-to-rail output stage can deliver negative gate voltage to enhance IGBT/MOSFET turn-off immunity against Miller-induced false turn-on.
What is the purpose of the Shield pin (Pin 4) on the VOFD343A-X018T?
The Shield pin (Pin 4) connects internally to the isolation barrier's guard structure and must be externally tied to VEE. This connection suppresses capacitive coupling across the isolation barrier, improving common-mode transient immunity to 35 kV/μs and reducing noise-induced output glitches during high-dv/dt switching events.
Can the VOFD343A-X018T drive 1700 V IGBTs directly?
No, the VOFD343A-X018T is specified for direct drive of IGBTs rated up to 1200 V / 100 A. For 1700 V IGBTs, Vishay documentation explicitly states that the VOFD343A-X018T should drive an external discrete power stage (e.g., complementary MOSFET pair) which then interfaces with the higher-voltage IGBT gate.
What are the UVLO thresholds for the VOFD343A-X018T?
The VOFD343A-X018T features under-voltage lockout with rising threshold VUVLO+ = 11.0–13.5 V (typ. 12.7 V) and falling threshold VUVLO− = 9.5–12.0 V (typ. 11.2 V), yielding 1.5 V hysteresis. This prevents partial gate drive during supply brown-out and ensures reliable turn-on only when VCC–VEE exceeds safe operating margins.
VOFD343A-X018T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Semiconductor Opto Division
- Series:
- -
- Package/Case:
- 6-SOIC (0.268", 6.80mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Optical Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 200ns, 200ns
- Pulse Width Distortion (Max):
- 70ns
- Rise / Fall Time (Typ):
- 35ns, 35ns
- Current - Output High, Low:
- 3A, 3A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- 1.37V
- Current - DC Forward (If) (Max):
- 25 mA
- Voltage - Output Supply:
- 15V ~ 30V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-SO Stretched
- Approval Agency:
- cUL, UL, VDE
VOFD343A-X018T FAQ
1.How can I place an order for VOFD343A-X018T through Aetrix?
Please submit a Request for Quotation (RFQ) for VOFD343A-X018T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VOFD343A-X018T reliable?
The price and inventory of VOFD343A-X018T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VOFD343A-X018T is usually 5 days.
3.What payment methods are accepted for VOFD343A-X018T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VOFD343A-X018T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VOFD343A-X018T?
VOFD343A-X018T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VOFD343A-X018T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VOFD343A-X018T?
For technical support, including VOFD343A-X018T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VOFD343A-X018T requirements.
6.How does Aetrix verify that VOFD343A-X018T is sourced from the original manufacturer or authorized distributors?
All VOFD343A-X018T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VOFD343A-X018T meets industry standards.
7.What is the process for return or replacement of VOFD343A-X018T?
All VOFD343A-X018T units undergo pre-shipment inspection (PSI). If there is an issue with VOFD343A-X018T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VOFD343A-X018T part is unused and in its original packaging.
Return procedure for VOFD343A-X018T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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