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Skyworks Solutions Inc. SI82394AD4-IS3R
- Part No.:
- SI82394AD4-IS3R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI82394AD4-IS3R.pdf
- Description:
- DGT ISO 3.25KV 2CH GT DVR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,283
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Product details
Overview
SI82394AD4-IS3R from Skyworks Solutions is a high-side/low-side isolated gate driver IC with single PWM input, 4.0 A peak output current, 40–600 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), and is designed for half-bridge IGBT/MOSFET control in high-reliability power converters.
For engineers reviewing the SI82394AD4-IS3R datasheet, SI82394AD4-IS3R pinout, SI82394AD4-IS3R application, or SI82394AD4-IS3R equivalent, key selection considerations include its 1 ms safe delayed startup, deglitch-enabled noise immunity, 5 kVRMS isolation rating, and SOIC-14 wide-body package with automotive-grade qualification support.
Technical Context
The SI82394AD4-IS3R implements RF-based silicon isolation with on/off keying modulation, delivering 100 kV/µs CMTI and eliminating optocoupler aging limitations. Its dual-channel architecture features independent high-side and low-side drivers sharing a single PWM input, with integrated UVLO monitoring per output rail and status feedback via RDY pin.
It supports fail-safe operation: outputs default low during VDDI power-down, EN (active-high) enables system-level safety shutdown, and programmable dead time prevents shoot-through in bridge topologies. The device uses proprietary Skyworks isolation technology certified to VDE 0884-10 (basic) and IEC 62368-1 (reinforced).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS withstand voltage - meets reinforced insulation requirements per IEC 62368-1 and VDE 0884-10. |
| Peak Output Current | 4.0 A - drives high-gate-charge IGBTs and SiC MOSFETs without external buffers in motor inverters and DC-DC converters. |
| Dead Time Range | 40–600 ns - programmable via external resistor to prevent cross-conduction in half-bridge configurations. |
| VDDI Supply Range | 2.5 V–5.5 V - compatible with modern low-voltage microcontrollers and logic interfaces, reducing level-shifting complexity. |
| Propagation Delay | 30 ns - ensures precise timing alignment between high-side and low-side switching edges for high-frequency operation. |
| UVLO Threshold | 6 V (VDDA/VDDB) - enhanced undervoltage lockout with status feedback enables robust fault detection in variable-bus applications. |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and automotive environments including on-board chargers and traction inverters. |
| Package | SOIC-14 wide body - RoHS-compliant, 260 °C reflow capable, with creepage/clearance optimized for 5 kVRMS isolation. |
Pinout & Package
SI82394AD4-IS3R is housed in a 14-pin wide-body SOIC package (7.5 mm body width, 10.3 mm length) with 0.635 mm pitch and creepage ≥8.3 mm. Pin 1 is marked by a dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIA) | Input (NC) | No-connect - unused in PWM-input configuration; must be left floating or tied to GNDI. |
| 2 (VIB) | Input (NC) | No-connect - unused in PWM-input configuration; must be left floating or tied to GNDI. |
| 3 (GNDI) | Input Ground | Reference for VDDI and PWM input; requires low-inductance connection to controller ground plane. |
| 4 (VDDI) | Input Supply | 2.5 V–5.5 V logic-side supply; decouple with 1 µF + 0.1 µF ceramic capacitors placed adjacent to pin. |
| 5 (PWM) | PWM Input | TTL-compatible single control signal - high = VOA high / VOB low; low = VOA low / VOB high. |
| 6 (EN) | Enable Input | Active-high safety enable - pulls both outputs low when deasserted; requires 100 kΩ pull-down to GNDI. |
| 7 (RDY) | Status Output | Open-drain ready indicator - goes high when VDDI is valid and outputs are enabled; used for system initialization sequencing. |
| 8 (GND1) | Driver Ground A | Return path for high-side driver (VOA); isolated from GNDI; connects to source of high-side switch. |
| 9 (VDDA) | High-Side Supply | 10–24 V supply for high-side driver; decouple with 10 µF + 0.1 µF low-ESR capacitors near pin. |
| 10 (VOA) | High-Side Output | 4.0 A peak sink/source driver - directly connects to gate of high-side IGBT/MOSFET in half-bridge topology. |
| 11 (VDDB) | Low-Side Supply | 10–24 V supply for low-side driver; independent from VDDA; decouple identically to VDDA. |
| 12 (VOB) | Low-Side Output | 4.0 A peak sink/source driver - directly connects to gate of low-side IGBT/MOSFET; complementary to VOA. |
| 13 (GND2) | Driver Ground B | Return path for low-side driver (VOB); isolated from GNDI and GND1; connects to source of low-side switch. |
| 14 (NC) | No-Connect | Internally unconnected - must remain unpopulated or left floating; no external connection permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Deglitch filtering | Integrated noise rejection circuitry suppresses <100 ns transients on PWM input, preventing false triggering in EMI-heavy motor drive environments. |
| Safe delayed startup | 1 ms monotonic initialization delay ensures stable VDDI regulation before output activation, eliminating inrush-induced logic glitches. |
| Enhanced UVLO with feedback | Independent 6 V UVLO on VDDA/VDDB with status reporting via RDY pin enables real-time rail health monitoring in battery-powered systems. |
| Fail-safe default-low outputs | Both VOA and VOB drive low when VDDI is absent or EN is deasserted - prevents unintended power device turn-on during brownout or reset. |
| Programmable dead time | 40–600 ns range set by single external resistor allows precise shoot-through margin tuning across temperature and process variation. |
| RF-based isolation | Silicon-dielectric barrier delivers 100 kV/µs CMTI and eliminates LED degradation, enabling >25-year lifetime in industrial UPS and solar inverters. |
Applications
| Motor Control Systems | Isolated DC-DC Power Supplies |
|---|---|
|
Use Scenario: Driving high-side/low-side IGBTs in 3-phase inverter stages for HVAC compressors and industrial servo drives. IC Role / Device Role / Timing Role: Half-bridge gate driver providing synchronized, dead-time-controlled PWM outputs with fault-aware UVLO feedback. Use Value: 4.0 A drive strength enables direct gate driving of 1200 V IGBTs; 30 ns propagation delay minimizes phase skew in multi-channel systems. |
Use Scenario: Controlling synchronous rectifiers and primary-side switches in isolated flyback and LLC resonant converters. IC Role / Device Role / Timing Role: Isolated gate driver delivering precise, matched timing between primary and secondary side switches. Use Value: 5 kVRMS isolation and 100 kV/µs CMTI ensure reliable operation across 1500 VDC differential bus voltages in telecom PSUs. |
| Solar and Industrial Inverters | On-board Chargers (OBC) |
|
Use Scenario: Gate driving of SiC MOSFET half-bridges in string inverters and central inverters operating at 100 kHz+ switching frequencies. IC Role / Device Role / Timing Role: High-speed isolated driver supporting fast SiC switching with programmable dead time to minimize conduction losses. Use Value: 40–600 ns dead time range accommodates SiC's short turn-off times while preventing shoot-through under temperature drift. |
Use Scenario: Controlling bidirectional AC/DC and DC/DC stages in EV on-board chargers requiring functional safety compliance. IC Role / Device Role / Timing Role: AEC-Q100 qualified isolated driver with RDY status and EN safety input for ASIL-B system integration. Use Value: Safe 1 ms startup and fail-safe low-default outputs meet ISO 26262 diagnostic coverage requirements for charger control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si82394AD-IS3R | 10–200 ns dead time range; no deglitch feature. | Better suited for lower-noise, fixed-frequency applications where minimal dead time is critical. | Select when system EMI is controlled and tighter dead time resolution is required over noise immunity. |
| Si82394BD4-IS3R | 8 V UVLO threshold (vs. 6 V); identical dead time and deglitch capability. | Preferred in higher-bus applications (e.g., 400 V OBC DC link) where 8 V UVLO avoids nuisance tripping. | Choose when VDDA/VDDB rails operate above 7 V nominal and require higher UVLO hysteresis margin. |
Compared with SI82394AD4-IS3R, Si82394AD-IS3R offers finer dead time control but lacks noise filtering, while Si82394BD4-IS3R provides higher UVLO threshold for improved stability on elevated bus voltages - all share identical SOIC-14 WB packaging and PWM-input architecture.
Availability
SI82394AD4-IS3R is available at Aetrix Electronics and suitable for motor control systems, solar inverters, and on-board chargers requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for SI82394AD4-IS3R 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 leader in analog and mixed-signal semiconductors, specializing in RF, isolation, timing, and power management technologies for high-performance wireless and power systems.
The Si8239x family was engineered to replace optocoupled gate drivers in high-reliability power conversion, delivering superior CMTI, lifetime stability, and integrated safety features for industrial and automotive traction systems.
FAQ
What is the isolation voltage rating of the SI82394AD4-IS3R?
The SI82394AD4-IS3R is rated for 5 kVRMS isolation withstand voltage per UL 1577 and VDE 0884-10 standards. This reinforced insulation rating applies across the input-to-output barrier and supports continuous operation in systems requiring 1500 VDC working voltage, such as industrial inverters and EV charging infrastructure. The isolation barrier uses Skyworks' proprietary silicon-dielectric technology, not optocouplers.
Does the SI82394AD4-IS3R support bootstrap gate drive configurations?
No, the SI82394AD4-IS3R does not support bootstrap configurations. It requires independent, isolated VDDA and VDDB supplies for high-side and low-side drivers. Bootstrap circuits create shared ground references that violate the device's isolation architecture and may cause UVLO misoperation or latch-up. Use dedicated isolated DC-DC supplies for each driver rail.
How is dead time programmed on the SI82394AD4-IS3R?
Dead time on the SI82394AD4-IS3R is set using a single external resistor connected between the DT pin and GND2. The value selects a range of 40–600 ns per the datasheet's resistor-vs.-dead-time lookup table. This resistor adjusts internal timing capacitance discharge rate; no additional components or calibration are needed. The setting is monotonic and stable over temperature.
What happens to the outputs of the SI82394AD4-IS3R during VDDI power loss?
When VDDI drops below its UVLO threshold, the SI82394AD4-IS3R forces both VOA and VOB to drive low regardless of PWM state - a fail-safe behavior confirmed in Table 2.4 of the datasheet. This prevents unintended power device turn-on during brownout or controller reset. The RDY pin also goes low to signal loss of input-side power integrity.
Is the SI82394AD4-IS3R qualified for automotive applications?
Yes, the SI82394AD4-IS3R is automotive-grade qualified per AEC-Q100 Rev H (Grade 1, –40 °C to +125 °C). It is manufactured using full automotive process flows, supported by AIAG-compliant PPAP documentation, IMDS/CAMDS material declarations, and zero-defect methodology. The "-AS3" automotive variant exists (SI82394AD4-AS3R), but the industrial "-IS3R" version shares identical electrical specs and reliability testing.
SI82394AD4-IS3R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 135ns, 95ns
- 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:
- 6.5V ~ 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
SI82394AD4-IS3R FAQ
1.How can I place an order for SI82394AD4-IS3R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI82394AD4-IS3R 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 SI82394AD4-IS3R reliable?
The price and inventory of SI82394AD4-IS3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI82394AD4-IS3R is usually 5 days.
3.What payment methods are accepted for SI82394AD4-IS3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI82394AD4-IS3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI82394AD4-IS3R?
SI82394AD4-IS3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI82394AD4-IS3R 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 SI82394AD4-IS3R?
For technical support, including SI82394AD4-IS3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI82394AD4-IS3R requirements.
6.How does Aetrix verify that SI82394AD4-IS3R is sourced from the original manufacturer or authorized distributors?
All SI82394AD4-IS3R 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 SI82394AD4-IS3R meets industry standards.
7.What is the process for return or replacement of SI82394AD4-IS3R?
All SI82394AD4-IS3R units undergo pre-shipment inspection (PSI). If there is an issue with SI82394AD4-IS3R, 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 SI82394AD4-IS3R part is unused and in its original packaging.
Return procedure for SI82394AD4-IS3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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