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Home > Products > Isolators > Isolators - Gate Drivers

Vishay Semiconductor Opto Division VOFD343A-X019T

Name: VOFD343A-X019T
Brand: Vishay Semiconductor Opto Division
SKU: VOFD343A-X019T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: VOFD343A-X019T

Manufacturer:: Vishay Semiconductor Opto Division

Category:: Isolators - Gate Drivers

Package:: 6-SOIC (0.268", 6.80mm Width)

Datasheet:: VOFD343A-X019T.pdf

Description:: SMD-6 IGBT MOSFET DRIVER 4A

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Product details

Overview

VOFD343A-X019T from Vishay Semiconductors is a high-speed, high-current optocoupled IGBT/MOSFET gate driver with AlGaAs LED input and integrated power output stage. It delivers 4.0 A peak output current, supports 15 V to 30 V supply range, and achieves ≤200 ns propagation delay - enabling direct drive of up to 1200 V / 100 A IGBTs in motor inverter stages.

For engineers reviewing the VOFD343A-X019T datasheet, VOFD343A-X019T pinout, VOFD343A-X019T application, or VOFD343A-X019T equivalent, key selection criteria include common-mode transient immunity (35 kV/μs), rail-to-rail output capability, UVLO thresholds (11.0–13.5 V turn-on), -40 °C to +125 °C operation, and stretched SO-6 package with VDE certification (option 1).

Technical Context

The VOFD343A-X019T implements an optically isolated, single-channel gate driver architecture with a high-voltage output stage capable of sourcing and sinking ≥3.0 A continuous and 4.0 A peak current. Its logic-compatible input drives an AlGaAs LED, while the output stage features rail-to-rail swing, UVLO protection with 1.5 V hysteresis, and differential propagation delay control (±100 ns max).

Designed for high-noise industrial environments, it achieves 35 kV/μs common-mode transient immunity at both high- and low-level output states under 1500 V CM transients, and meets DIN EN 60747-5-5 (VDE 0884-5) for reinforced insulation with VIOTM = 8000 V_peak and VIORM = 1140 V_peak in stretched SO-6 (option 8) - confirmed for VOFD343A-X019T per ordering table.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Output Current	4.0 A - sufficient for direct gate drive of 1200 V / 100 A IGBTs without external buffer stage
Propagation Delay	≤200 ns - enables switching at up to 75 kHz with tight timing control in inverter PWM stages
Common-Mode Immunity	35 kV/μs - maintains signal integrity during fast dV/dt transients in motor drive half-bridges
Supply Voltage Range	15 V to 30 V - compatible with standard industrial gate drive rails and supports wide-margin UVLO operation
Operating Temperature	-40 °C to +125 °C - qualified for under-hood, industrial inverter, and UPS thermal environments
Isolation Rating	8000 V_peak transient (VDE), 5000 V_RMS (UL) - meets reinforced insulation requirements for functional safety designs
UVLO Threshold	11.0–13.5 V turn-on, 9.5–12.0 V turn-off - prevents erratic gate behavior during brown-out conditions

Pinout & Package

VOFD343A-X019T uses the stretched SO-6 (option 8) surface-mount package with 7.62 mm creepage and 8.0 mm clearance, optimized for high-voltage isolation. Pin 1 is anode, Pin 2 cathode, Pin 3 V_O (output), Pin 4 V_EE (low-side supply), Pin 5 V_CC (high-side supply), Pin 6 shield (connected internally to V_EE for noise suppression).

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	LED input anode	Accepts 8–16 mA forward current to enable output stage; requires series resistor for current limiting
2 (Cathode)	LED input cathode	Reference for input logic; tied to system ground or controller low-side return
3 (V_O)	Gate drive output	Rail-to-rail output node delivering ±4.0 A peak to IGBT/MOSFET gate; connects directly to gate terminal
4 (V_EE)	Low-side supply	Return path for output stage; must be decoupled to ground with 0.1 µF capacitor near pin
5 (V_CC)	High-side supply	Positive supply for output stage (15–30 V); requires local 0.1 µF decoupling to minimize ringing
6 (Shield)	Internal shield terminal	Internally connected to V_EE; improves CMR by reducing capacitive coupling across isolation barrier

Key Features

Feature	Design Value
Rail-to-rail output stage	Drives IGBT gates fully to V_CC or V_EE, minimizing conduction losses and ensuring robust turn-on/turn-off margins
35 kV/μs common-mode rejection	Suppresses noise-induced false triggering in high-dV/dt motor inverter legs, eliminating need for external snubbers
UVLO with 1.5 V hysteresis	Prevents partial gate drive during undervoltage events, avoiding shoot-through risk in half-bridge configurations
Stretched SO-6 with VDE option 1	Provides certified reinforced insulation (VIOTM = 8000 V_peak) required for IEC 61800-5-1 and UL 61800-5-1 compliance
−40 °C to +125 °C operation	Enables deployment in demanding environments including industrial drives, induction cooktops, and UPS systems

Applications

AC Motor Inverter	Induction Cooktop
Use Scenario: Driving IGBT half-bridge in variable-frequency AC motor drives for HVAC and industrial pumps. IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, high-current turn-on/turn-off signals with precise timing alignment between high- and low-side switches. Use Value: Enables 75 kHz PWM operation with <200 ns propagation delay and <100 ns channel-to-channel skew, reducing switching losses and EMI.	Use Scenario: Controlling resonant IGBTs in high-frequency induction heating circuits for domestic cooktops. IC Role / Device Role / Timing Role: High-CMR gate driver maintaining signal integrity amid rapid dV/dt (>5 kV/μs) generated by ZVS/ZCS resonant tank collapse. Use Value: 35 kV/μs CMR prevents false triggering during zero-crossing transitions, improving thermal efficiency and user safety.
Industrial UPS	Brushless DC Motor Drive
Use Scenario: Gate driving IGBTs in bidirectional DC/AC inverters for online UPS systems with battery backup. IC Role / Device Role / Timing Role: Reinforced-isolation driver supporting dual-direction power flow and meeting UL 62368-1 and IEC 62040-1 safety standards. Use Value: 8000 V_peak VDE-rated isolation and -40 °C to +125 °C operation ensure reliability during extended grid-out events and thermal stress.	Use Scenario: Driving six-pack IGBT modules in field-oriented control (FOC) systems for servo and robotics applications. IC Role / Device Role / Timing Role: Precision-timed gate driver delivering matched t_PLH/t_PHL (±100 ns) to minimize dead-time uncertainty and torque ripple. Use Value: Rail-to-rail output swing and 4.0 A peak current reduce gate charge time, enabling faster commutation and higher motor bandwidth.

AC Motor Inverter

Induction Cooktop

Use Scenario: Driving IGBT half-bridge in variable-frequency AC motor drives for HVAC and industrial pumps.

IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, high-current turn-on/turn-off signals with precise timing alignment between high- and low-side switches.

Use Value: Enables 75 kHz PWM operation with <200 ns propagation delay and <100 ns channel-to-channel skew, reducing switching losses and EMI.

Use Scenario: Controlling resonant IGBTs in high-frequency induction heating circuits for domestic cooktops.

IC Role / Device Role / Timing Role: High-CMR gate driver maintaining signal integrity amid rapid dV/dt (>5 kV/μs) generated by ZVS/ZCS resonant tank collapse.

Use Value: 35 kV/μs CMR prevents false triggering during zero-crossing transitions, improving thermal efficiency and user safety.

Industrial UPS

Brushless DC Motor Drive

Use Scenario: Gate driving IGBTs in bidirectional DC/AC inverters for online UPS systems with battery backup.

IC Role / Device Role / Timing Role: Reinforced-isolation driver supporting dual-direction power flow and meeting UL 62368-1 and IEC 62040-1 safety standards.

Use Value: 8000 V_peak VDE-rated isolation and -40 °C to +125 °C operation ensure reliability during extended grid-out events and thermal stress.

Use Scenario: Driving six-pack IGBT modules in field-oriented control (FOC) systems for servo and robotics applications.

IC Role / Device Role / Timing Role: Precision-timed gate driver delivering matched t_PLH/t_PHL (±100 ns) to minimize dead-time uncertainty and torque ripple.

Use Value: Rail-to-rail output swing and 4.0 A peak current reduce gate charge time, enabling faster commutation and higher motor bandwidth.

Equivalent & Alternatives

The following parts are listed as comparable options for similar optocoupled gate driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si827x series (Silicon Labs)	Digital isolator-based driver; 4 A peak, but uses CMOS input instead of LED; no UVLO hysteresis spec provided	Lacks VDE-certified reinforced insulation; requires external UVLO circuitry for full functional safety compliance	Preferred where digital control interface and lower propagation delay (<100 ns) are prioritized over certified isolation
HCPL-316J (Broadcom)	Optocoupler-based; 2.5 A peak output, 400 ns max propagation delay, 15 kV/μs CMR, UL/cUL only (no VDE)	Lower drive strength and CMR limit use to ≤600 V IGBTs; not suitable for 1200 V systems or VDE-mandated designs	Cost-effective alternative for legacy 600 V inverter designs where VDE certification and 4 A drive are not required

Compared with VOFD343A-X019T, the Si827x offers faster timing but lacks certified VDE isolation and integrated UVLO, while HCPL-316J provides lower-cost optocoupling at reduced performance and safety certification scope - making VOFD343A-X019T the only option meeting 1200 V IGBT drive, 35 kV/μs CMR, and VDE 0884-5 simultaneously.

Availability

VOFD343A-X019T is available at Aetrix Electronics and suitable for industrial inverters, uninterruptible power supplies (UPS), and induction cooking systems requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for VOFD343A-X019T 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 high-reliability, high-voltage, and high-temperature performance.

The VOFD343A-X019T belongs to Vishay's high-current optocoupled gate driver family, engineered specifically for robust, certified isolation in motor control, industrial power conversion, and safety-critical power electronics.

FAQ

What is the isolation rating of VOFD343A-X019T and how does it differ from standard optocouplers?

VOFD343A-X019T is certified to DIN EN 60747-5-5 (VDE 0884-5) with 8000 V_peak transient isolation voltage (VIOTM) and 1140 V_peak repetitive peak voltage (VIORM) in its stretched SO-6 (option 8) package. Unlike basic UL-only optocouplers, this VDE rating confirms reinforced insulation suitable for functional safety applications such as IEC 61800-5-1-compliant drives - a distinction clearly specified in the VOFD343A-X019T ordering table and safety ratings section.

Can VOFD343A-X019T directly drive a 1200 V, 100 A IGBT without external buffering?

Yes, VOFD343A-X019T is explicitly rated for direct drive of IGBTs up to 1200 V / 100 A, as stated in the product description and confirmed by its 4.0 A peak output current, rail-to-rail output stage, and 30 V maximum supply rating. The datasheet specifies this capability under recommended operating conditions (V_CC – V_EE = 15–30 V, T_amb = −40 °C to +125 °C), and includes design guidance for gate resistor selection and layout to sustain this performance.

What is the purpose of Pin 6 (Shield) on VOFD343A-X019T and how should it be connected?

Pin 6 is the internal shield terminal, connected internally to V_EE to reduce capacitive coupling across the isolation barrier. Per the datasheet, it must be externally tied to the V_EE net - not left floating or grounded separately - to achieve the specified 35 kV/μs common-mode transient immunity. This connection is critical for noise suppression in high-dV/dt applications like motor inverter half-bridges, and is validated in the CMR test circuit (Fig. 4).

Does VOFD343A-X019T include under-voltage lockout (UVLO), and what are its thresholds?

Yes, VOFD343A-X019T integrates UVLO with turn-on threshold of 11.0–13.5 V and turn-off threshold of 9.5–12.0 V, yielding 1.5 V typical hysteresis. These values are measured under V_CC = 30 V and are specified in the Electrical Characteristics table. The UVLO function disables the output stage when supply drops below the lower threshold, preventing unsafe partial gate drive - a key requirement for reliable operation in industrial power systems.

How does the stretched SO-6 package of VOFD343A-X019T improve isolation compared to standard SO-6?

The stretched SO-6 (option 8) used in VOFD343A-X019T increases creepage to ≥8 mm and clearance to ≥8 mm - versus ~5 mm in standard SO-6 - enabling 8000 V_peak transient isolation (VIOTM) and VDE 0884-5 certification. These mechanical enhancements are documented in the Package Dimensions (Fig. 16) and Safety Ratings tables, and are essential for meeting reinforced insulation requirements in high-voltage industrial equipment.

VOFD343A-X019T 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-X019T FAQ

1.How can I place an order for VOFD343A-X019T through Aetrix?

Please submit a Request for Quotation (RFQ) for VOFD343A-X019T 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-X019T reliable?

The price and inventory of VOFD343A-X019T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VOFD343A-X019T is usually 5 days.

3.What payment methods are accepted for VOFD343A-X019T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VOFD343A-X019T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for VOFD343A-X019T?

VOFD343A-X019T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your VOFD343A-X019T 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-X019T?

For technical support, including VOFD343A-X019T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VOFD343A-X019T requirements.

6.How does Aetrix verify that VOFD343A-X019T is sourced from the original manufacturer or authorized distributors?

All VOFD343A-X019T 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-X019T meets industry standards.

7.What is the process for return or replacement of VOFD343A-X019T?

All VOFD343A-X019T units undergo pre-shipment inspection (PSI). If there is an issue with VOFD343A-X019T, 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-X019T part is unused and in its original packaging.

Return procedure for VOFD343A-X019T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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