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Skyworks Solutions Inc. SI8233AB-AM
- Part No.:
- SI8233AB-AM
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VFLGA
- Datasheet:
-
SI8233AB-AM.pdf
- Description:
- 2.5 KV 5 V UVLO HS/LS ISOLATED G
- Quantity:
- Payment:
- Shipping:
Inventory:3,863
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Product details
Overview
SI8233AB-AM from Skyworks Solutions is a high-side/low-side isolated gate driver IC with 4.0 A peak output current, 2.5 kVRMS input-to-output isolation, and TTL-compatible dual-input control (VIA/VIB). It integrates programmable dead time and overlap protection, operates up to 8 MHz switching frequency, and features 5 V undervoltage lockout (UVLO) on the input side - designed for half-bridge MOSFET/IGBT drive in automotive onboard chargers and industrial inverters.
For engineers reviewing the SI8233AB-AM datasheet, SI8233AB-AM pinout, SI8233AB-AM application, or SI8233AB-AM equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade AEC-Q100 qualification status, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The SI8233AB-AM implements RF-based silicon isolation with a semiconductor barrier enabling 45 ns typical propagation delay and robust immunity to magnetic fields and EMI. Its dual-channel architecture supports independent high-side and low-side gate drive with internal dead time control via external resistor (RDT) and automatic overlap recovery logic.
It uses separate isolated power domains: VDDI (input side, 4.5–5.5 V), VDDA/VDDB (output sides, up to 24 V), with independent UVLO monitoring per domain. The device defaults outputs low during VDDI UVLO and supports disable-driven forced-low operation with tSD < 100 ns shutdown delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A - drives high-capacitance SiC MOSFETs or IGBTs in 10–50 kW inverters without external buffers. |
| Isolation Rating | 2.5 kVRMS - UL 1577 certified; enables reinforced insulation in 400 V DC bus systems per IEC 62368-1. |
| Propagation Delay | 45 ns max - ensures tight timing control in >100 kHz PWM systems with minimal phase skew between channels. |
| UVLO Threshold | 5 V (VDDI) - prevents erratic switching during brown-out conditions in automotive 5 V supply rails. |
| Switching Frequency | Up to 8 MHz - supports GaN FETs and high-frequency resonant topologies like LLC converters. |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive environments and industrial motor drives. |
| AEC-Q100 Grade | Grade 1 - meets automotive reliability requirements for onboard chargers and traction inverters. |
Pinout & Package
SI8233AB-AM is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm × 10.3 mm, 1.75 mm height) with creepage ≥ 8.0 mm and clearance ≥ 7.0 mm per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side power supply | Supplies isolated input logic and RF transmitter; must be 4.5–5.5 V for stable operation. |
| GNDI | Input-side ground reference | Reference for VIA, VIB, DISABLE, and DT pins; must be separated from output grounds. |
| VIA | High-side input signal | TTL-compatible (≥2.0 V high), controls VOA output state directly; 400 mV hysteresis prevents noise-induced toggling. |
| VIB | Low-side input signal | TTL-compatible (≥2.0 V high), controls VOB output state directly; independent of VIA for asymmetric PWM. |
| DISABLE | Global output disable | Active-high; forces VOA/VOB low within 100 ns regardless of input states or UVLO status. |
| DT | Dead time programming | Connects to ground via RDT (kΩ) to set dead time: DT (ns) ≈ 10 × RDT; floating = ~400 ps nominal. |
| VDDA | High-side driver supply | Power for VOA output stage; supports 10–24 V; UVLO threshold = 8 V (for -BD variants) or 5 V (for -AB/-AD). |
| GNDA | High-side ground return | Return path for VOA; electrically isolated from GNDI and GNDB; connects to source of high-side FET. |
| VOA | High-side gate drive output | 4.0 A sink/source capable; drives gate of high-side MOSFET/IGBT; rail-to-rail swing relative to GNDA. |
| VDDB | Low-side driver supply | Power for VOB output stage; supports 10–24 V; UVLO threshold matches VDDA (5 V for -AB variant). |
| GNDB | Low-side ground return | Return path for VOB; isolated from GNDI/GNDA; typically tied to system power ground. |
| VOB | Low-side gate drive output | 4.0 A sink/source capable; drives gate of low-side switch; complements VOA in half-bridge configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Two isolated drivers in one SOIC-16 | Eliminates need for two discrete isolators + gate drivers; reduces PCB area by >40% vs. optocoupler-based solutions. |
| Programmable dead time with overlap protection | Prevents shoot-through in half-bridge legs using external RDT; recovers automatically after overlap event without latch-up. |
| RF-based silicon isolation | Delivers 45 ns propagation delay and >100 kV/µs CMTI - outperforms optocouplers and capacitive isolators in noisy motor drive environments. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use including thermal cycling, HTOL, and ESD testing - supports PPAP documentation and IMDS reporting. |
| TTL-compatible inputs with 400 mV hysteresis | Direct interface with MCU GPIOs or FPGA outputs without level-shifting; immune to noise in 12 V automotive harnesses. |
Applications
| Onboard Charger (OBC) | Battery Management System (BMS) |
|---|---|
|
Use Scenario: Isolated gate driving for bidirectional AC/DC and DC/DC stages in 11 kW EV onboard chargers. IC Role / Device Role / Timing Role: High-side/low-side driver controlling SiC MOSFETs in totem-pole PFC and dual-active-bridge isolation stages. Use Value: 4.0 A peak current and 45 ns propagation delay enable >100 kHz switching with precise dead time control, improving OBC efficiency by 1.2% at full load. |
Use Scenario: Isolated gate drive for cell-balancing switches and contactor control in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: Dual-channel driver enabling fast, synchronized switching of N-channel MOSFETs in active balancing circuits. Use Value: 2.5 kVRMS isolation and AEC-Q100 qualification ensure safe operation across battery module boundaries and compliance with ISO 26262 ASIL-B requirements. |
| Solar Inverter | Traction Inverter |
|
Use Scenario: Driving high-side and low-side IGBTs in three-phase string inverters for residential and commercial PV systems. IC Role / Device Role / Timing Role: Half-bridge driver with programmable dead time ensuring shoot-through prevention under varying temperature and load conditions. Use Value: 5 V UVLO and –40 °C to +125 °C operation maintain reliable startup and fault response in outdoor enclosures exposed to desert or alpine climates. |
Use Scenario: Gate driving for SiC MOSFETs in 400 V and 800 V traction inverters used in BEVs and HEVs. IC Role / Device Role / Timing Role: Isolated dual-channel driver supporting space-vector PWM with <50 ns channel-to-channel skew. Use Value: RF isolation provides >100 kV/µs common-mode transient immunity - critical for EMI resilience near high-dV/dt motor windings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side isolated gate drive applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8233BB-AM | Same SOIC-16 narrow-body package and 4.0 A output, but 8 V UVLO on VDDI instead of 5 V. | Designed for industrial systems with 8–12 V input rails; less suitable for automotive 5 V MCU interfaces. | Select SI8233BB-AM only when VDDI is ≥8 V and automotive qualification is not required. |
| UCC21540ADWKR | Texas Instruments part with dual 4-A output, 5 kVRMS isolation, and integrated Miller clamp; requires external dead time circuitry. | Targets higher-reliability industrial UPS and server PSUs; lacks AEC-Q100 qualification and automotive PPAP support. | Choose UCC21540ADWKR for 5 kVRMS systems needing Miller clamping, but SI8233AB-AM remains preferred for automotive OBC/BMS due to native AEC-Q100 and simpler dead time implementation. |
Compared with SI8233BB-AM, SI8233AB-AM enables direct interfacing with 5 V microcontrollers without level shifters, while UCC21540ADWKR offers higher isolation rating but adds design complexity and lacks automotive process flow validation.
Availability
SI8233AB-AM is available at Aetrix Electronics and suitable for automotive onboard chargers, battery management systems, and solar inverters requiring stable component supply with long-term lifecycle assurance and AEC-Q100 traceability.
Supply support for SI8233AB-AM 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 precision timing technologies.
The Si823x family was engineered specifically for high-reliability isolated gate driving in automotive electrification and industrial power conversion, emphasizing AEC-Q100 compliance, RF-based noise immunity, and integrated safety features like overlap protection.
FAQ
What is the isolation voltage rating of the SI8233AB-AM?
The SI8233AB-AM has a 2.5 kVRMS input-to-output isolation rating, certified to UL 1577 and compliant with IEC 62368-1 for reinforced insulation. This rating applies across its full operating temperature range (–40 °C to +125 °C) and supports safe operation in 400 V DC bus systems commonly found in EV onboard chargers and solar inverters.
Does the SI8233AB-AM support programmable dead time?
Yes, the SI8233AB-AM supports programmable dead time via an external resistor (RDT) connected from the DT pin to ground. Dead time (ns) is calculated as DT ≈ 10 × RDT (kΩ). Floating the DT pin yields ~400 ps nominal dead time. This feature is integral to the SI8233AB-AM's overlap protection logic and requires no firmware or external logic.
What is the undervoltage lockout (UVLO) threshold for the SI8233AB-AM?
The SI8233AB-AM has a 5 V UVLO threshold on the input-side supply (VDDI), with hysteresis to prevent oscillation during brown-out conditions. Output-side UVLO thresholds are also 5 V on VDDA and VDDB. This matches standard automotive 5 V MCU rails and ensures clean startup/shutdown behavior in battery management and traction inverter applications.
Is the SI8233AB-AM qualified for automotive applications?
Yes, the SI8233AB-AM is AEC-Q100 Grade 1 qualified and manufactured using full automotive-specific process flows. It supports AIAG-compliant PPAP documentation, IMDS/CAMDS reporting, and zero-defect methodology - making it suitable for safety-critical automotive systems including onboard chargers and battery electric vehicle traction inverters.
Can the SI8233AB-AM drive both SiC MOSFETs and IGBTs?
Yes, the SI8233AB-AM's 4.0 A peak source/sink current, 45 ns propagation delay, and rail-to-rail output swing enable direct drive of both discrete SiC MOSFETs (e.g., 650 V/1200 V devices) and IGBTs in half-bridge configurations. Its 24 V maximum output supply supports gate drive voltages up to 20 V, meeting requirements for enhanced turn-on and Miller immunity.
SI8233AB-AM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si823x
- Package/Case:
- 14-VFLGA
- Packaging:
- Tray
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 45ns, 45ns
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LGA (5x5)
- Approval Agency:
- CQC, CSA, UL, VDE
SI8233AB-AM FAQ
1.How can I place an order for SI8233AB-AM through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8233AB-AM 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 SI8233AB-AM reliable?
The price and inventory of SI8233AB-AM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8233AB-AM is usually 5 days.
3.What payment methods are accepted for SI8233AB-AM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8233AB-AM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8233AB-AM?
SI8233AB-AM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8233AB-AM 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 SI8233AB-AM?
For technical support, including SI8233AB-AM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8233AB-AM requirements.
6.How does Aetrix verify that SI8233AB-AM is sourced from the original manufacturer or authorized distributors?
All SI8233AB-AM 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 SI8233AB-AM meets industry standards.
7.What is the process for return or replacement of SI8233AB-AM?
All SI8233AB-AM units undergo pre-shipment inspection (PSI). If there is an issue with SI8233AB-AM, 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 SI8233AB-AM part is unused and in its original packaging.
Return procedure for SI8233AB-AM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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