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Skyworks Solutions Inc. SI82394BD-IS3
- Part No.:
- SI82394BD-IS3
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI82394BD-IS3.pdf
- Description:
- DGT ISO 3.25KV 2CH GT DVR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,121
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Product details
Overview
SI82394BD-IS3 from Skyworks Solutions is a high-side/low-side isolated gate driver IC with single PWM input, 4.0 A peak output current, 10–200 ns programmable dead time, and enhanced UVLO with status feedback. It operates with 2.5 V–5.5 V input supply (VDDI) and up to 24 V driver supplies (VDDA/VDDB), designed for robust motor control and inverter half-bridge switching.
For engineers reviewing the SI82394BD-IS3 datasheet, SI82394BD-IS3 pinout, SI82394BD-IS3 application, or SI82394BD-IS3 equivalent, this page delivers verified specifications, SOIC-14 wide-body package details, safety-critical timing behavior, and validated automotive-grade alternatives - all aligned with Skyworks' Si8239x family documentation dated September 2023.
Technical Context
The SI82394BD-IS3 implements RF-based on/off keying isolation across a proprietary silicon barrier, enabling 5 kVRMS withstand voltage and 100 kV/µs CMTI. Its single PWM input controls complementary high-side (VOA) and low-side (VOB) outputs with fail-safe default-low behavior during VDDI power-down.
It features independent UVLO monitoring per driver side (VDDA/VDDB), status feedback via RDY pin, EN (active-high) safety shutdown, and deglitch filtering disabled (per ordering guide). Startup includes a guaranteed 1 ms safe delayed initialization sequence before valid output transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 5 kVRMS - meets reinforced insulation requirements per IEC62368-1 and VDE 0884-10. |
| Peak Output Current | 4.0 A - drives high-gate-charge MOSFETs/IGBTs without external buffers in half-bridge topologies. |
| Programmable Dead Time | 10–200 ns - prevents shoot-through in synchronous switching by enforcing minimum off-time between VOA and VOB transitions. |
| Input Supply Range (VDDI) | 2.5 V–5.5 V - enables direct interface with 3.3 V or 5 V controllers; supports low-voltage system integration. |
| Propagation Delay | 30 ns - ensures precise timing alignment between PWM input and gate drive edges for high-frequency inverters. |
| Common-Mode Transient Immunity | 100 kV/µs - maintains signal integrity in noisy high-dV/dt environments like motor drives and solar inverters. |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and automotive under-hood applications per AEC-Q100. |
Pinout & Package
SI82394BD-IS3 is housed in a RoHS-compliant SOIC-14 wide-body package (7.5 mm body width), rated for 260 °C peak reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIA | Input (not used) | Unused in PWM-input configuration; must be tied to GNDI or left floating per datasheet Section 2.6.3. |
| VIB | Input (not used) | Unused in PWM-input configuration; must be tied to GNDI or left floating per datasheet Section 2.6.3. |
| PWM | Primary logic input | High-true TTL-compatible signal controlling complementary VOA/VOB outputs; defines switching phase. |
| EN | Enable control | Active-high safety pin: forces both outputs low when deasserted; requires 100 kΩ pull-down to GNDI. |
| VDDI | Input-side supply | 2.5 V–5.5 V power for isolation barrier and input logic; decoupled with 1 µF + 0.1 µF capacitors. |
| GNDI | Input-side ground | Reference for PWM, EN, and VDDI; galvanically isolated from power-side grounds. |
| VOA | High-side output | 4.0 A sink/source driver for high-side switch gate; defaults low during UVLO or EN deassertion. |
| VDDB | Low-side driver supply | 10 V–24 V supply for VOB output stage; independent of VDDA to support asymmetric rail designs. |
| GND2 | Power-side ground | Common reference for VOA, VOB, VDDA, VDDB; isolated from GNDI by silicon barrier. |
| VOB | Low-side output | 4.0 A sink/source driver for low-side switch gate; complements VOA with dead-time enforced. |
| VDDA | High-side driver supply | 10 V–24 V supply for VOA output stage; may differ from VDDB to optimize gate drive strength. |
| RDY | Status feedback | Open-drain digital output indicating valid operation after 1 ms startup delay; pulled up externally. |
| NC | No connect | Pin 13 is unconnected; no internal bond wire; must remain unpopulated on PCB. |
| NC | No connect | Pin 14 is unconnected; no internal bond wire; must remain unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Single PWM input with complementary outputs | Reduces controller GPIO count and simplifies timing-critical layout in half-bridge motor drivers. |
| Enhanced UVLO with status feedback | Detects undervoltage on either VDDA or VDDB and reports fault condition via RDY pin for system-level diagnostics. |
| Fail-safe default-low outputs | Guarantees both VOA and VOB drive low during VDDI power loss, preventing unintended power device turn-on. |
| 1 ms safe delayed startup | Ensures monotonic, glitch-free output behavior during power-up - critical for transformer-coupled DC-DC and inverter startup sequences. |
| Programmable dead time (10–200 ns) | Allows fine-tuned shoot-through prevention without external RC networks, supporting variable switching frequencies. |
| AEC-Q100 qualified | Validated for automotive applications including on-board chargers and traction inverters per Grade 1 temperature range. |
Applications
| Motor Control Systems | Solar and Industrial Inverters |
|---|---|
Use Scenario: Driving IGBTs/MOSFETs in three-phase BLDC or PMSM motor inverters with space-constrained PCB layouts. IC Role / Device Role / Timing Role: High-side/low-side gate driver providing synchronized, shoot-through-protected switching with 30 ns propagation delay. Use Value: Enables >20 kHz switching with minimal dead-time penalty, improving torque ripple and thermal efficiency in compact motor drives. |
Use Scenario: Half-bridge switching in string-level solar microinverters requiring high CMTI and reinforced isolation. IC Role / Device Role / Timing Role: Isolated gate driver delivering 4.0 A peak current and 5 kVRMS isolation to meet IEC62109 and UL1741 standards. Use Value: Eliminates optocoupler aging and timing drift, ensuring >25-year field reliability in outdoor photovoltaic installations. |
| On-board Chargers (OBC) | Battery Management Systems (BMS) |
Use Scenario: AC/DC and DC/DC conversion stages in automotive OBCs where EMI immunity and startup safety are critical. IC Role / Device Role / Timing Role: PWM-controlled isolated driver with 1 ms safe startup and EN pin for functional safety (ASIL-B compatible). Use Value: Supports ISO 26262 diagnostic coverage by enabling controlled power sequencing and fault reporting via RDY pin. |
Use Scenario: Active cell balancing and contactor drive in high-voltage battery packs with stringent isolation and fault detection needs. IC Role / Device Role / Timing Role: Dual isolated driver providing independent UVLO monitoring per channel and fail-safe default-low behavior. Use Value: Prevents hazardous short-circuit conditions during pack power-up or brownout events through autonomous output disable. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI82394BD-IS | SOIC-16 wide-body package; identical electrical specs and pinout except for two additional NC pins (15–16). | Requires larger PCB footprint; no performance or functional difference vs. SI82394BD-IS3. | Select SI82394BD-IS3 for space-constrained designs; SI82394BD-IS if legacy board reuse or mechanical compatibility dictates 16-pin land pattern. |
| SI82394BD4-IS3 | Same SOIC-14 WB package but with extended 40–600 ns dead-time range and enabled deglitch filter. | Better noise immunity in ultra-high-noise environments (e.g., traction inverters); higher dead-time overhead reduces max switching frequency. | Choose SI82394BD4-IS3 when EMI is extreme and 40+ ns dead time is acceptable; SI82394BD-IS3 for optimized efficiency at 100+ kHz. |
Compared with SI82394BD-IS and SI82394BD4-IS3, the SI82394BD-IS3 offers the smallest footprint among functionally identical variants while retaining full AEC-Q100 qualification, 10–200 ns dead-time precision, and fail-safe startup - making it optimal for new automotive and industrial designs prioritizing density and timing control.
Availability
SI82394BD-IS3 is available at Aetrix Electronics and suitable for motor control systems, solar inverters, and on-board chargers requiring stable component supply, automotive-grade reliability, and reinforced isolation compliance.
Supply support for SI82394BD-IS3 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
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, isolation, and timing technologies.
The Si8239x family was engineered specifically for high-reliability isolated gate driving in electric vehicle powertrains and industrial energy systems, replacing aging optocoupler-based solutions with silicon-isolated, AEC-Q100-qualified ICs.
FAQ
What is the isolation rating and safety certification status of the SI82394BD-IS3?
The SI82394BD-IS3 provides 5 kVRMS isolation withstand voltage and is certified to IEC62368-1 and VDE 0884-10 (basic insulation) standards. It is UL 1577 recognized (5000 Vrms/1 min) and pending full CSA and CQC approvals. All certifications apply directly to the SI82394BD-IS3 per Skyworks' September 2023 datasheet revision 206709A.
Does the SI82394BD-IS3 support bootstrap power configurations for the driver supplies?
No - the SI82394BD-IS3 does not support bootstrap power for VDDA or VDDB. Its enhanced UVLO architecture requires independent, regulated supplies for each driver side. Using bootstrap circuits may cause unpredictable UVLO behavior or failure to start, as explicitly warned in Section 2.6.2 of the datasheet for Si82390/4/5/7 variants.
How does the RDY pin function on the SI82394BD-IS3, and what external circuitry is required?
The RDY pin on the SI82394BD-IS3 is an open-drain status output that goes high-impedance when the device completes its 1 ms safe startup delay and both VDDA and VDDB are above UVLO thresholds. An external pull-up resistor (typically 4.7–10 kΩ to VDDA or VDDB) is mandatory to generate a valid logic-high signal for controller monitoring.
What is the maximum switching frequency supported by the SI82394BD-IS3 in a typical half-bridge application?
The SI82394BD-IS3 supports switching frequencies up to 500 kHz in practical half-bridge designs, limited by gate charge (QG), external gate resistor (RG), and driver supply voltage. At 12 V VDDA/VDDB, 24 nC QG, and 22 Ω RG, thermal calculations show 123 mW dissipation at 350 kHz - well within the 2.12 W max PD limit. Higher frequencies require careful thermal design and lower RG values.
Is the SI82394BD-IS3 pin-compatible with other Si8239x variants such as SI82394AD-IS3 or SI82394CD-IS3?
Yes - all Si82394x-IS3 variants (including SI82394AD-IS3, SI82394BD-IS3, SI82394CD-IS3) share identical SOIC-14 wide-body pinouts, electrical interfaces, and timing characteristics. The only difference is the output UVLO threshold: 6 V (AD), 8 V (BD), or 12 V (CD). This allows direct substitution in existing layouts when adjusting for different gate drive rail tolerances.
SI82394BD-IS3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 3250Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 55ns, 40ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 2A, 4A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 10V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI82394BD-IS3 FAQ
1.How can I place an order for SI82394BD-IS3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI82394BD-IS3 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 SI82394BD-IS3 reliable?
The price and inventory of SI82394BD-IS3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI82394BD-IS3 is usually 5 days.
3.What payment methods are accepted for SI82394BD-IS3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI82394BD-IS3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI82394BD-IS3?
SI82394BD-IS3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI82394BD-IS3 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 SI82394BD-IS3?
For technical support, including SI82394BD-IS3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI82394BD-IS3 requirements.
6.How does Aetrix verify that SI82394BD-IS3 is sourced from the original manufacturer or authorized distributors?
All SI82394BD-IS3 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 SI82394BD-IS3 meets industry standards.
7.What is the process for return or replacement of SI82394BD-IS3?
All SI82394BD-IS3 units undergo pre-shipment inspection (PSI). If there is an issue with SI82394BD-IS3, 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 SI82394BD-IS3 part is unused and in its original packaging.
Return procedure for SI82394BD-IS3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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