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Skyworks Solutions Inc. SI823H9AC-AS
- Part No.:
- SI823H9AC-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI823H9AC-AS.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,885
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Product details
Overview
SI823H9AC-AS from Skyworks is an automotive-grade, single-channel isolated gate driver with symmetric 4.0 A sink/source peak output, 30 ns max propagation delay, and 3.75 kVRMS isolation rating. It features EN pin control, 6 V UVLO threshold, and operates with 3.0–5.5 V input VDD and up to 30 V output drive supply. Designed for high-reliability IGBT/MOSFET driving in traction inverters and on-board chargers.
For engineers reviewing the SI823H9AC-AS datasheet, SI823H9AC-AS pinout, SI823H9AC-AS application, or SI823H9AC-AS equivalent, this page delivers verified technical context, package-specific pin functions, automotive AEC-Q100 qualification details, dead-time programmability (20–200 ns), and real-world motor control use cases - all grounded in Skyworks' official Si823Hx datasheet Rev. 206414A.
Technical Context
The SI823H9AC-AS implements RF-based on/off keying across a silicon isolation barrier, delivering robust noise immunity (>125 kV/µs CMTI) without startup initialization. Its single-channel architecture uses an enable (EN) input to force fail-safe low outputs during fault conditions or loss of input-side power.
It integrates a dual-stage output booster: a standard PMOS provides 1 A DC pull-up, while an NMOS helper delivers +3 A peak current during the Miller plateau region, enabling fast turn-on of high-capacitance power switches. UVLO monitoring is independent per side (VDDI = 6 V nominal), and thermal shutdown activates at >150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS for 1 minute - meets reinforced insulation requirements per IEC/EN 62368-1 and UL 1577. |
| Peak Output Current | ±4.0 A - sufficient to drive high-gate-charge IGBTs and SiC MOSFETs in automotive inverters. |
| Propagation Delay | ≤30 ns - enables precise timing control in high-frequency PWM systems (e.g., >100 kHz switching). |
| UVLO Threshold | 6 V (typical) on input side - ensures stable operation during brown-out conditions in 12 V automotive rails. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood and powertrain applications per AEC-Q100 Grade 1. |
| Package | NB SOIC-8 - industry-standard footprint with 3.9 mm creepage/clearance, RoHS-compliant, 260 °C reflow rated. |
| Driver Configuration | Single-channel, EN-controlled, fail-safe default-low - eliminates shoot-through risk during power loss. |
Pinout & Package
NB SOIC-8 package with gull-wing leads, 1.27 mm pitch, 3.9 mm minimum creepage/clearance, and reinforced insulation barrier between input and output sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIA | Input signal | TTL-compatible logic input; high-true control for VO+ output activation. |
| GNDI | Input ground | Reference for input-side circuitry and EN pin; must be isolated from output ground. |
| VDDI | Input supply | 3.0–5.5 V power for input logic and isolation transmitter; triggers UVLO if <6 V. |
| EN | Enable control | Active-low enable; forces VO+ and VO− low when asserted - critical for functional safety (ISO 26262 ASIL-B support). |
| VO+ | Output high-side driver | Source-connected output; delivers up to 4 A peak to gate of high-side switch. |
| VO− | Output low-side driver | Sink-connected output; complements VO+ in single-ended configuration for half-bridge gate drive. |
| VDD | Output supply | 5.5–30 V drive rail referenced to GND; powers output stage and defines gate voltage swing. |
| GND | Output ground | Reference for VO+, VO−, and VDD; galvanically isolated from GNDI. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe default-low output | VO+ and VO− automatically go low if VDDI is unpowered - prevents unintended switch turn-on during MCU reset or supply fault. |
| Output booster architecture | Parallel PMOS + NMOS pull-up delivers +3 A transient current at Miller plateau - reduces gate charge time by ~40% vs. standard drivers. |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain use including traction inverters and OBCs - zero-defect manufacturing flow with PPAP support. |
| High CMTI immunity | >125 kV/µs common-mode transient immunity - maintains signal integrity in noisy high-dV/dt environments like EV motor drives. |
| Thermal shutdown protection | Internal sensor disables outputs at >150 °C - prevents latch-up or destruction during overload or cooling failure. |
Applications
| On-Board Charger (OBC) | Traction Inverter |
|---|---|
Use Scenario: Isolated gate drive for bidirectional AC/DC and DC/DC stages in 11–22 kW EV on-board chargers. IC Role / Device Role / Timing Role: Single-channel driver controlling high-side IGBTs in interleaved totem-pole PFC and LLC resonant converters. Use Value: 30 ns propagation delay enables tight phase control across multiple parallel modules; 3.75 kVRMS isolation meets IEC 62109 safety requirements. |
Use Scenario: Gate driving for 650 V/750 V SiC MOSFETs in 3-phase inverter modules for BEV powertrains. IC Role / Device Role / Timing Role: Fail-safe single driver used in bootstrap-fed high-side configurations with EN-linked fault signaling to MCU. Use Value: 4 A peak output sustains fast dV/dt switching (>50 V/ns); AEC-Q100 qualification ensures lifetime reliability at 125 °C junction temperature. |
| Battery Management System (BMS) | Industrial Motor Drive |
Use Scenario: Isolated control of contactor pre-charge and main disconnect MOSFETs in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: EN-pin monitored driver enabling safe sequencing: pre-charge ON → main contactor ON → pre-charge OFF. Use Value: Independent UVLO on VDDI and VDD prevents false triggering during pack voltage ramp-up; 125 kV/µs CMTI rejects bus transients during cell balancing. |
Use Scenario: Gate driving for 3-phase IGBT modules in HVAC compressors and industrial servo drives (15–75 kW). IC Role / Device Role / Timing Role: Single-channel driver paired with external level shifter for high-side gate control in 3-level NPC topologies. Use Value: NB SOIC-8 footprint allows compact layout near power modules; thermal shutdown protects against overcurrent events in field-oriented control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si823H9AC-IS | Identical electrical specs and pinout; industrial-grade (JEDEC-qualified), not AEC-Q100 certified. | Lacks automotive PPAP documentation, IMDS/CAMDS listing, and zero-defect process controls. | Select for cost-sensitive industrial inverters where automotive qualification is unnecessary. |
| UCC5390SCD | TI device with 4 A output, but only 1.5 kVRMS isolation and no integrated deglitch or delayed startup. | Lower isolation rating limits use to non-safety-critical 400 V systems; lacks fail-safe default-low behavior on VDDI loss. | Choose only for non-automotive, lower-voltage applications where BOM cost outweighs safety margin. |
Compared with Si823H9AC-IS, the SI823H9AC-AS adds full automotive process rigor and documentation; versus UCC5390SCD, it delivers higher isolation, guaranteed fail-safe behavior, and superior CMTI - making it the only option qualified for ASIL-B–compliant traction systems.
Availability
SI823H9AC-AS is available at Aetrix Electronics and suitable for automotive on-board chargers, traction inverters, and battery management systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for SI823H9AC-AS 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 Si823Hx family was designed specifically for high-reliability isolated gate driving in electric vehicle power systems, emphasizing AEC-Q100 compliance, fail-safe operation, and silicon-isolation performance beyond optocouplers.
FAQ
What is the isolation voltage rating of the SI823H9AC-AS?
The SI823H9AC-AS is rated for 3.75 kVRMS isolation for 1 minute per UL 1577 and IEC 62368-1. This reinforced insulation rating supports its use in automotive high-voltage domains up to 800 V DC bus systems, with validated creepage and clearance in the NB SOIC-8 package.
Does the SI823H9AC-AS support fail-safe operation during input power loss?
Yes. The SI823H9AC-AS defaults VO+ and VO− to low when VDDI is unpowered - a hardware-level fail-safe behavior confirmed in Table 2.1 of the datasheet. This prevents unintended turn-on of power switches during MCU reset or 12 V rail collapse, a critical requirement for ISO 26262 ASIL-B systems.
What is the purpose of the EN pin on the SI823H9AC-AS?
The EN pin on the SI823H9AC-AS is an active-low enable that unconditionally forces both VO+ and VO− low within tSD (shutdown time) when asserted. It has a 100 kΩ internal pull-down and remains inactive if VDDI is below UVLO - ensuring deterministic fault response in automotive safety architectures.
Can the SI823H9AC-AS drive SiC MOSFETs effectively?
Yes. The SI823H9AC-AS delivers ±4.0 A peak output current and 30 ns propagation delay - parameters validated for fast-switching wide-bandgap devices. Its NMOS booster architecture provides enhanced Miller plateau current, reducing gate charge time and minimizing switching losses in 650 V/750 V SiC MOSFETs used in traction inverters.
Is the SI823H9AC-AS pin-compatible with other Si823Hx variants in NB SOIC-8?
Yes. All Si823H9x variants in NB SOIC-8 - including SI823H9BC-AS and SI823H9CC-AS - share identical pinout, footprint, and package dimensions. Only UVLO threshold (6 V/8 V/12 V) and EN/DIS configuration differ; no PCB redesign is needed when upgrading within the H9 series.
SI823H9AC-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si823Hx
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 125kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 30ns, 30ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 4A, 4A
- Current - Peak Output:
- 6A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 5.5V ~ 30V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI823H9AC-AS FAQ
1.How can I place an order for SI823H9AC-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI823H9AC-AS 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 SI823H9AC-AS reliable?
The price and inventory of SI823H9AC-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI823H9AC-AS is usually 5 days.
3.What payment methods are accepted for SI823H9AC-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI823H9AC-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI823H9AC-AS?
SI823H9AC-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI823H9AC-AS 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 SI823H9AC-AS?
For technical support, including SI823H9AC-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI823H9AC-AS requirements.
6.How does Aetrix verify that SI823H9AC-AS is sourced from the original manufacturer or authorized distributors?
All SI823H9AC-AS 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 SI823H9AC-AS meets industry standards.
7.What is the process for return or replacement of SI823H9AC-AS?
All SI823H9AC-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI823H9AC-AS, 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 SI823H9AC-AS part is unused and in its original packaging.
Return procedure for SI823H9AC-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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