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Skyworks Solutions Inc. SI82391AB-IS1
- Part No.:
- SI82391AB-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI82391AB-IS1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,426
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Product details
Overview
SI82391AB-IS1 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, operates with 2.5 V–5.5 V input supply (VDDI), supports up to 5 kVRMS isolation, and features enhanced output UVLO with no UVLO status pin. It is used in industrial inverters, motor drives, and isolated DC-DC supplies requiring robust noise immunity and fail-safe operation.
For engineers reviewing the SI82391AB-IS1 datasheet, SI82391AB-IS1 pinout, SI82391AB-IS1 application, or SI82391AB-IS1 equivalent, key selection criteria include its SOIC-16 narrow-body package, 6 V output UVLO threshold, absence of UVLO status feedback pin, programmable dead time capability, and compatibility with 10–200 ns dead-time settings in PWM configurations.
Technical Context
The SI82391AB-IS1 implements RF-based silicon isolation with a proprietary on/off-keyed carrier, enabling high CMTI (100 kV/µs) and low propagation delay (30 ns). Its dual independent inputs (VIA/VIB) drive isolated outputs (VOA/VOB) with fail-safe default-low behavior during VDDI power-down.
It integrates EN (active-high) enable control, 1 ms safe delayed startup, and enhanced UVLO monitoring per output stage - but omits the UVLO status (RDY) pin found in Si82390-series variants. Output UVLO thresholds are fixed at 6 V (VDDA/VDDB), and driver-side supply range is 10–24 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS withstand voltage - enables reinforced insulation per IEC62368-1 and UL 1577 for safety-critical power systems. |
| Peak Output Current | 4.0 A - sufficient to directly drive high-gate-charge IGBTs and GaN FETs without external buffers in 10–350 kHz switching applications. |
| Input Supply Range | VDDI = 2.5 V–5.5 V - supports direct interface with 3.3 V or 5 V microcontrollers and logic controllers without level-shifting. |
| Output UVLO Threshold | 6 V - ensures gate drivers disable cleanly when driver-side supply drops below safe MOSFET turn-on voltage, preventing partial conduction. |
| Propagation Delay | 30 ns - enables precise timing control in high-frequency topologies like LLC resonant converters and SiC-based inverters. |
| Common-Mode Transient Immunity | 100 kV/µs - maintains signal integrity in noisy high-dv/dt environments such as motor drives and traction inverters. |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and automotive under-hood applications including on-board chargers and battery management systems. |
Pinout & Package
SI82391AB-IS1 is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width), optimized for space-constrained PCB layouts while maintaining creepage/clearance for reinforced isolation.
| 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 shutdown: forces both VOA and VOB low regardless of input states when pulled low. |
| VDDI | Input-side supply | 2.5 V–5.5 V power for input logic and isolation barrier; UVLO triggers at 2.3 V (typical). |
| GNDI | Input-side ground | Reference for VIA, VIB, EN, and VDDI; galvanically isolated from power-side grounds. |
| VDDA | Driver A supply | 10–24 V supply for high-side or low-side output stage A; monitored for 6 V UVLO. |
| VOA | Output A | 4.0 A capable push-pull output; defaults low if VDDI unpowered or VDDA < 6 V. |
| GND1 | Driver A ground | Power-side ground reference for VDDA and VOA; isolated from GNDI and GND2. |
| VDDB | Driver B supply | 10–24 V supply for output stage B; independently monitored for 6 V UVLO. |
| VOB | Output B | 4.0 A capable push-pull output; defaults low if VDDI unpowered or VDDB < 6 V. |
| GND2 | Driver B ground | Power-side ground reference for VDDB and VOB; isolated from GNDI and GND1. |
| NC | No connect | Pins 1, 2, 15, 16 are internally unused and must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated drivers in one SOIC-16 NB package | Reduces board area by ~40% vs. two discrete optocoupler-based drivers; eliminates inter-channel skew in half-bridge timing. |
| Enhanced output UVLO with 6 V threshold | Prevents shoot-through in bridge circuits by forcing both outputs low when either VDDA or VDDB falls below 6 V - critical for IGBT reliability. |
| Fail-safe default-low outputs | Ensures MOSFETs/IGBTs remain off during power-up, brown-out, or isolation barrier fault - eliminating need for external pull-down resistors. |
| 1 ms delayed startup time | Guarantees monotonic output behavior during system initialization, avoiding transient glitches that could trigger overcurrent protection. |
| Programmable dead time (10–200 ns) | Configurable via external RC network to prevent cross-conduction in synchronous rectifiers and half-bridge topologies without MCU intervention. |
| Skyworks silicon isolation technology | Delivers 100 kV/µs CMTI and 30 ns propagation delay - outperforming optocouplers in EMI-heavy motor control and solar inverter applications. |
Applications
| Industrial Inverters | Motor Control Systems |
|---|---|
|
Use Scenario: Three-phase solar or UPS inverters operating at 16–20 kHz with IGBT modules. IC Role / Device Role / Timing Role: High-side/low-side gate driver providing isolated, synchronized turn-on/turn-off control for each phase leg. Use Value: 4.0 A peak drive current ensures fast IGBT switching with minimal Miller plateau time; 5 kVRMS isolation meets IEC62109 safety requirements. |
Use Scenario: Field-oriented control (FOC) of PMSM motors in HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Dual-channel isolated driver delivering precise timing between high-side and low-side switches in inverter legs. Use Value: 30 ns propagation delay matching and <1 ns skew enable sub-microsecond dead-time accuracy - essential for torque ripple reduction. |
| Isolated DC-DC Power Supplies | Battery Management Systems |
|
Use Scenario: 1 kW telecom or server DC-DC converters using active clamp forward or phase-shifted full-bridge topologies. IC Role / Device Role / Timing Role: Gate driver for primary-side synchronous rectifiers and secondary-side high-side switches with reinforced isolation. Use Value: 2.5 V VDDI compatibility allows direct connection to 3.3 V controller ICs; 100 kV/µs CMTI prevents false triggering from transformer leakage spikes. |
Use Scenario: High-voltage battery packs (400–800 V) in EVs requiring isolated gate driving for contactor pre-charge and cell balancing FETs. IC Role / Device Role / Timing Role: Isolated driver for high-side N-channel MOSFETs in bidirectional DC-DC converters interfacing battery and auxiliary systems. Use Value: AEC-Q100 qualified variant available; –40 °C to +125 °C operation supports under-hood thermal cycling; fail-safe low-default prevents unintended contactor closure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si82391AD-IS | SOIC-16 wide-body package (7.5 mm width); identical electrical specs, UVLO, and dead-time capability. | Requires larger PCB footprint but offers improved creepage (>8.0 mm) for higher-altitude or medical-grade isolation compliance. | Select Si82391AD-IS when reinforced insulation spacing >7.5 mm is mandated by end-equipment safety standards. |
| UCC5390SCDR | Texas Instruments part with 4 A drive, 5 kVRMS isolation, but only 3.3/5 V VDDI support (no 2.5 V operation); no programmable dead time. | Lacks 2.5 V logic compatibility and dead-time tuning - limits use with ultra-low-power MCUs and precision timing-critical topologies. | Choose UCC5390SCDR only if existing design uses 3.3 V controllers and dead-time is managed externally via MCU or RC network. |
Compared with Si82391AD-IS, SI82391AB-IS1 saves board space with its narrow-body SOIC-16 footprint while retaining full functional equivalence; versus UCC5390SCDR, SI82391AB-IS1 provides broader VDDI flexibility and integrated dead-time control - reducing component count and timing uncertainty in high-reliability power systems.
Availability
SI82391AB-IS1 is available at Aetrix Electronics and suitable for industrial inverters, motor control systems, and isolated DC-DC power supplies requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for SI82391AB-IS1 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 aging optocoupler-based gate drivers with higher reliability, tighter timing, and enhanced safety features - targeting high-efficiency power conversion in industrial, automotive, and renewable energy systems.
FAQ
What is the UVLO behavior of SI82391AB-IS1 during power-up?
During power-up, SI82391AB-IS1 holds both VOA and VOB low until VDDI exceeds its UVLO threshold (~2.3 V) and remains above it for the 1 ms delayed startup period. Only then do outputs respond to VIA/VIB inputs. This ensures glitch-free initialization in systems where uncontrolled gate drive could cause shoot-through or overcurrent events.
Does SI82391AB-IS1 support bootstrap power for the driver side?
No - SI82391AB-IS1 does not support bootstrap power for VDDA or VDDB. Its enhanced UVLO architecture requires independent, regulated 10–24 V supplies for each driver channel. Using bootstrap circuits may cause erratic UVLO behavior or failure to exit UVLO, as confirmed in Section 2.6.2 of the datasheet.
Can SI82391AB-IS1 be used in automotive applications?
Yes - the automotive-grade variant SI82391AB-AS1 is AEC-Q100 qualified, manufactured with automotive-specific process flows, and supported with AIAG-compliant PPAP documentation. SI82391AB-IS1 itself is industrial-grade but shares identical electrical parameters and packaging; it is commonly used in non-safety-critical automotive subsystems like HVAC and lighting.
What is the purpose of the EN pin on SI82391AB-IS1?
The EN pin on SI82391AB-IS1 is an active-high enable input that unconditionally forces both VOA and VOB low when pulled low - overriding all input signals. It must be pulled down via a 100 kΩ resistor to GNDI when not actively driven. This provides hardware-level fault containment during system faults or emergency shutdown sequences.
How does SI82391AB-IS1 differ from SI82390AB-IS1?
SI82391AB-IS1 lacks the RDY (UVLO status) pin present in SI82390AB-IS1 and uses a 6 V output UVLO threshold without status feedback. SI82390AB-IS1 provides real-time UVLO status indication via RDY, enabling controller-level diagnostics - whereas SI82391AB-IS1 prioritizes simplicity and reduced pin count for cost-sensitive, non-diagnostic applications.
SI82391AB-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-IS1 FAQ
1.How can I place an order for SI82391AB-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI82391AB-IS1 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-IS1 reliable?
The price and inventory of SI82391AB-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI82391AB-IS1 is usually 5 days.
3.What payment methods are accepted for SI82391AB-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI82391AB-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI82391AB-IS1?
SI82391AB-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI82391AB-IS1 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-IS1?
For technical support, including SI82391AB-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI82391AB-IS1 requirements.
6.How does Aetrix verify that SI82391AB-IS1 is sourced from the original manufacturer or authorized distributors?
All SI82391AB-IS1 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-IS1 meets industry standards.
7.What is the process for return or replacement of SI82391AB-IS1?
All SI82391AB-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI82391AB-IS1, 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-IS1 part is unused and in its original packaging.
Return procedure for SI82391AB-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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