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Skyworks Solutions Inc. SI82391AB-IS1R
- Part No.:
- SI82391AB-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI82391AB-IS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
SI82391AB-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC designed for high-side/low-side MOSFET and IGBT control in power converters. It delivers 4.0 A peak output current per channel, operates with 2.5 V–5.5 V input supply (VDDI), supports up to 5 kVRMS isolation, and features enhanced UVLO with no status pin - confirmed for SOIC-16 narrow-body package. It is used in solar inverters and motor drives requiring robust noise immunity and fail-safe shutdown.
For engineers reviewing the SI82391AB-IS1R datasheet, SI82391AB-IS1R pinout, SI82391AB-IS1R application, or SI82391AB-IS1R equivalent, key selection criteria include its 6 V output UVLO threshold, absence of UVLO status feedback, 1 ms safe startup delay, programmable dead time (10–200 ns), and compatibility with independent VIA/VIB inputs in industrial-grade operation.
Technical Context
The SI82391AB-IS1R implements RF-based on/off keying across a silicon isolation barrier, enabling high CMTI (100 kV/µs) and low propagation delay (30 ns). Its dual-channel architecture supports independent high-side and low-side gate drive with separate VIA and VIB logic inputs, and includes EN (active-high) for system-level safety control.
It integrates enhanced output UVLO monitoring per channel, automatic low-default behavior during VDDI power-down, and deglitch filtering. Unlike Si82390/1/3 variants with UVLO status feedback, SI82391AB-IS1R omits the RDY pin - confirmed by ordering guide Table 1.1 and truth table 2.1 - making it suitable for applications where status reporting is unnecessary but deterministic fail-safe behavior is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS withstand voltage - enables reinforced insulation per IEC62368-1 and UL 1577 for mains-connected power systems. |
| Peak Output Current | 4.0 A per channel - sufficient to rapidly charge/discharge high-Qg MOSFETs and IGBTs in <100 kHz switching applications. |
| Input Supply Range | VDDI = 2.5 V–5.5 V - compatible with modern low-voltage microcontrollers and FPGA I/O without level-shifting. |
| Propagation Delay | 30 ns - ensures tight timing control in high-frequency PWM schemes and reduces dead-time uncertainty. |
| Output UVLO Threshold | 6 V - triggers automatic low-state output when either VDDA or VDDB falls below 6 V, preventing partial turn-on of power switches. |
| Startup Delay | 1 ms typical - guarantees monotonic, glitch-free output initialization after VDDI stabilization, critical for transformer-coupled topologies. |
| Operating Temperature | –40 °C to +125 °C - validated for under-hood automotive and industrial ambient conditions without derating. |
Pinout & Package
SI82391AB-IS1R is housed in a RoHS-compliant SOIC-16 narrow-body package (7.5 mm width), with creepage/clearance optimized for reinforced insulation. Pin functions are defined per datasheet Section 6 and Figure 6.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIA | Channel A input | TTL-compatible high-true logic input controlling VOA; referenced to GNDI. |
| VIB | Channel B input | TTL-compatible high-true logic input controlling VOB; referenced to GNDI. |
| EN | Enable control | Active-high global enable: forces both outputs low when deasserted; requires 100 kΩ pull-down to GNDI. |
| VDDI | Input-side supply | Powers internal logic and isolator transmitter; 2.5 V–5.5 V range with UVLO at 2.3 V (VDDIUV–). |
| GNDI | Input-side ground | Reference for VIA, VIB, EN, and VDDI; galvanically isolated from power-side grounds. |
| VDDA | Channel A driver supply | Powers high-side or low-side output stage A; 10–24 V range with 6 V UVLO threshold. |
| VOA | Channel A output | 4.0 A capable push-pull driver output; defaults low if VDDI unpowered or VDDA < 6 V. |
| GND1 | Channel A ground | Return path for VDDA and VOA; isolated from GNDI and GND2. |
| VDDB | Channel B driver supply | Powers high-side or low-side output stage B; 10–24 V range with 6 V UVLO threshold. |
| VOB | Channel B output | 4.0 A capable push-pull driver output; defaults low if VDDI unpowered or VDDB < 6 V. |
| GND2 | Channel B ground | Return path for VDDB and VOB; isolated from GNDI and GND1. |
| VDDI | Input-side supply (redundant pin) | Second VDDI connection for improved decoupling; electrically tied to Pin 4. |
| GNDI | Input-side ground (redundant pin) | Second GNDI connection for improved decoupling; electrically tied to Pin 3. |
| NC | No connect | Internally unused; must be left floating or grounded per layout guidelines. |
| NC | No connect | Internally unused; must be left floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated drivers in single SOIC-16 NB package | Reduces PCB area and interconnect complexity vs. discrete optocoupler + gate driver solutions. |
| Enhanced output UVLO with 6 V threshold | Prevents shoot-through by forcing VOA/VOB low when either driver supply drops below safe operating voltage. |
| No UVLO status pin (RDY omitted) | Eliminates need for controller-side status polling - simplifies firmware and reduces I/O count in resource-constrained systems. |
| 1 ms delayed startup time | Ensures stable internal biasing before output activation, avoiding transient glitches during power-up sequences. |
| Programmable dead time (10–200 ns) | Allows fine-tuning of overlap protection between high-side and low-side switches without external circuitry. |
| 100 kV/µs CMTI rating | Guarantees reliable operation in noisy motor drive and inverter environments with fast dv/dt transients. |
Applications
| Solar Inverters | Motor Control Systems |
|---|---|
|
Use Scenario: Driving complementary IGBT half-bridge in string inverters with transformerless topology. IC Role / Device Role / Timing Role: Isolated high-side/low-side gate driver providing independent VIA/VIB control and 6 V UVLO supervision per leg. Use Value: Prevents flux imbalance via coordinated UVLO-induced low-state outputs, eliminating risk of core saturation during grid fault conditions. |
Use Scenario: Controlling three-phase BLDC inverter in HVAC compressors with space-constrained PCB layout. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering 4.0 A peak current and 30 ns propagation delay for precise PWM edge alignment. Use Value: Enables <100 ns dead-time margin at 20 kHz switching, reducing conduction losses while maintaining shoot-through immunity. |
| Industrial DC-DC Power Supplies | On-Board Chargers (OBC) |
|
Use Scenario: Gate driving synchronous rectifiers and primary-side switches in isolated LLC resonant converters. IC Role / Device Role / Timing Role: Fail-safe isolated driver with 1 ms startup delay ensuring monotonic output behavior during soft-start sequences. Use Value: Eliminates output oscillation during VDDI ramp-up, improving reliability of multi-rail power sequencing in telecom systems. |
Use Scenario: Driving high-side/low-side SiC MOSFETs in bidirectional OBC AC/DC and DC/AC stages. IC Role / Device Role / Timing Role: Industrial-grade isolated driver supporting 125 °C ambient operation and 5 kVRMS reinforced insulation per IEC62368-1. Use Value: Meets automotive functional safety requirements for non-AEC-Q100 OBC auxiliary circuits without additional certification overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI82391AD-IS | SOIC-16 wide-body package (10.3 mm width); identical electrical specs and UVLO configuration. | Requires larger PCB footprint but offers higher creepage (8.0 mm) for enhanced safety in 300–600 VAC systems. | Select SI82391AD-IS when reinforced insulation clearance >7.5 mm is mandated by end-equipment safety standards. |
| SI82391AB-IS1 | Same SOIC-16 narrow-body package and electrical behavior, but supplied in cut-tape (not tape-and-reel). | Identical performance; differs only in packaging format - SI82391AB-IS1R is reel-packaged for automated SMT placement. | Choose SI82391AB-IS1R for high-volume production lines requiring tape-and-reel feeding; SI82391AB-IS1 for prototyping or low-volume hand assembly. |
Compared with SI82391AD-IS, SI82391AB-IS1R saves 2.8 mm board width and reduces thermal resistance by 5 °C/W, while matching all timing, UVLO, and isolation specs - making it optimal for space-constrained industrial inverters. Against SI82391AB-IS1, the "R" suffix confirms verified tape-and-reel integrity for J-STD-033 compliance in moisture-sensitive SMT processes.
Availability
SI82391AB-IS1R is available at Aetrix Electronics and suitable for solar inverters, motor control systems, and isolated DC-DC power supplies requiring stable component supply, long-term lifecycle support, and automotive-qualified alternatives.
Supply support for SI82391AB-IS1R 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, timing, and isolation technologies.
The Si8239x family was engineered to replace optocoupler-based gate drivers in high-reliability power systems, delivering higher CMTI, lower propagation skew, and extended service life - specifically targeting industrial motor drives and renewable energy inverters.
FAQ
What is the UVLO behavior of SI82391AB-IS1R during power-up?
During power-up, SI82391AB-IS1R holds both VOA and VOB low until VDDI exceeds its UVLO threshold (2.3 V) and remains stable for 1 ms. After this safe startup delay, outputs follow VIA/VIB states - ensuring no spurious gate pulses occur before internal biasing stabilizes. This behavior is intrinsic to SI82391AB-IS1R and does not require external RC timing networks.
Does SI82391AB-IS1R support bootstrap power configurations for high-side drivers?
No - SI82391AB-IS1R must not be used with bootstrap power supplies. Its enhanced UVLO logic requires independent VDDA and VDDB rails; bootstrap circuits cause shared supply coupling that prevents proper UVLO detection and may force unintended low outputs. SI82391AB-IS1R requires fully isolated, independently regulated driver supplies for each channel.
How does the absence of an RDY pin affect system design with SI82391AB-IS1R?
The absence of an RDY pin in SI82391AB-IS1R eliminates status feedback to the controller, simplifying firmware and reducing GPIO usage. System designers rely on the guaranteed 1 ms startup delay and deterministic fail-safe outputs instead of polling readiness - making SI82391AB-IS1R ideal for real-time control loops where latency predictability outweighs diagnostic visibility.
What is the maximum recommended switching frequency for SI82391AB-IS1R when driving a 100 nC IGBT?
At 12 V VDDA/VDDB and 22 Ω external gate resistors, SI82391AB-IS1R supports up to 350 kHz switching with a 100 nC IGBT while maintaining junction temperature below 150 °C at 25 °C ambient. This is derived from the datasheet's power dissipation equation and thermal resistance (θja = 59 °C/W), confirming SI82391AB-IS1R's suitability for high-frequency industrial SMPS designs.
Is SI82391AB-IS1R pin-compatible with other Si8239x variants like SI82390AB-IS1?
No - SI82391AB-IS1R is not pin-compatible with SI82390AB-IS1. While both use SOIC-16 narrow-body packages, SI82390AB-IS1 includes an RDY pin (Pin 15) for UVLO status feedback, whereas SI82391AB-IS1 leaves Pin 15 as NC. Swapping them requires PCB layout revision and firmware updates to remove RDY polling logic.
SI82391AB-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 40ns, 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:
- 6.5V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI82391AB-IS1R FAQ
1.How can I place an order for SI82391AB-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI82391AB-IS1R 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 SI82391AB-IS1R reliable?
The price and inventory of SI82391AB-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI82391AB-IS1R is usually 5 days.
3.What payment methods are accepted for SI82391AB-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI82391AB-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI82391AB-IS1R?
SI82391AB-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI82391AB-IS1R 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 SI82391AB-IS1R?
For technical support, including SI82391AB-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI82391AB-IS1R requirements.
6.How does Aetrix verify that SI82391AB-IS1R is sourced from the original manufacturer or authorized distributors?
All SI82391AB-IS1R 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 SI82391AB-IS1R meets industry standards.
7.What is the process for return or replacement of SI82391AB-IS1R?
All SI82391AB-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI82391AB-IS1R, 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 SI82391AB-IS1R part is unused and in its original packaging.
Return procedure for SI82391AB-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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