My Inquiry
My Account
Skyworks Solutions Inc. SI8238BB-AS1R
- Part No.:
- SI8238BB-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8238BB-AS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,627
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8238BB-AS1R from Skyworks Solutions is an automotive-grade dual isolated gate driver IC with 4.0 A peak output current, 2.5 kVRMS input-to-output isolation, and SOIC-16 narrow-body package. It features independent TTL-compatible inputs (VIA/VIB), operates up to 24 V supply, and delivers fast 45 ns propagation delay for high-frequency half-bridge and inverter control in traction inverters and onboard chargers.
For engineers reviewing the SI8238BB-AS1R datasheet, SI8238BB-AS1R pinout, SI8238BB-AS1R application, or SI8238BB-AS1R equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, automotive-qualified alternatives, and supply-chain support details specific to this AEC-Q100-compliant dual-driver variant.
Technical Context
The SI8238BB-AS1R implements two fully isolated driver channels using Skyworks' proprietary silicon RF isolation barrier, enabling independent operation with up to 1500 VDC driver-to-driver differential voltage. Each channel supports TTL-level inputs with >400 mV hysteresis and drives MOSFET/IGBT gates without external level-shifting.
Unlike high-side/low-side variants, this dual-driver configuration lacks programmable dead time or overlap protection - outputs respond immediately to input transitions (no internal DT delay). UVLO thresholds are fixed at 8 V on all supplies (VDDI, VDDA, VDDB), ensuring robust startup behavior in automotive 12 V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation across 400 Vdc bus systems with reinforced insulation compliance to IEC 62368-1. |
| Peak Output Current | 4.0 A - sufficient to drive 1200 V SiC MOSFETs with <100 ns switching transitions in high-efficiency inverters. |
| Propagation Delay | 45 ns - ensures precise timing alignment between dual gate signals, critical for minimizing shoot-through in synchronous rectifiers. |
| Supply Voltage Range | 4.5–24 V on all rails - supports direct connection to automotive 12 V battery rail without LDO pre-regulation. |
| UVLO Threshold | 8 V (VDDI/VDDA/VDDB) - prevents erratic gate drive during cold-crank conditions down to 6.5 V battery voltage. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive environments per AEC-Q100 Grade 1. |
| Switching Frequency | Up to 8 MHz - supports high-frequency GaN-based power stages in compact OBC and DC-DC converters. |
Pinout & Package
SI8238BB-AS1R uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length) with creepage ≥5.5 mm and clearance ≥5.0 mm per IEC 60664-1 for 2.5 kVRMS isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side ground and power | GNDI (pins 1, 8), VDDI (pin 2) powers isolated input logic; pins 3–7 unused or NC per datasheet Figure 3. |
| 9, 10 | Independent logic inputs | VIA (pin 9), VIB (pin 10) - TTL-compatible, high-true inputs controlling VOA and VOB independently. |
| 11, 12, 13, 14, 15, 16 | Output-side power, ground, and drivers | VDDA (pin 11), GNDA (pin 12), VOA (pin 13), VDDB (pin 14), GNDB (pin 15), VOB (pin 16) - fully isolated dual output stage with separate supplies/grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated channels | Two independent 4.0 A drivers with 2.5 kVRMS isolation barrier - eliminates need for two discrete isolators in dual-switch topologies like H-bridge motor control. |
| TTL-compatible inputs | VIA/VIB accept 0.8–5.5 V logic levels with >400 mV hysteresis - interfaces directly with MCU GPIOs or PWM controllers without external biasing. |
| Automotive qualification | AEC-Q100 Grade 1, AIAG-compliant PPAP, IMDS/CAMDS listed - meets OEM requirements for safety-critical EV powertrain subsystems. |
| High EMI immunity | RF modulation architecture rejects >30 V/m radiated noise - maintains reliable operation near high-dv/dt switching nodes in traction inverters. |
| Fast propagation | 45 ns max delay with <5 ns skew between channels - enables tight timing margins in 100+ kHz SiC inverter designs. |
Applications
| Onboard Charger (OBC) | Traction Inverter |
|---|---|
Use Scenario: Controls bidirectional SiC MOSFETs in AC/DC and DC/DC stages of 11 kW EV onboard chargers. IC Role / Device Role / Timing Role: Dual gate driver providing isolated, synchronized turn-on/off for high-side and low-side switches in interleaved totem-pole PFC and CLLC resonant converters. Use Value: 4.0 A drive strength reduces external gate resistor count; 45 ns propagation enables >200 kHz switching with minimal dead-time overhead. |
Use Scenario: Drives phase-leg IGBTs or SiC modules in 400 V/800 V electric vehicle traction inverters. IC Role / Device Role / Timing Role: Isolated dual driver delivering independent gate signals to upper/lower switches in each inverter leg, with full galvanic separation between control and power domains. Use Value: 2.5 kVRMS isolation meets ISO 6469-3 functional safety requirements for high-voltage battery systems; AEC-Q100 qualification supports ASIL-B system integration. |
| Battery Management System (BMS) | Industrial Solar Inverter |
Use Scenario: Enables active cell balancing and contactor control in high-voltage EV battery packs (up to 900 V). IC Role / Device Role / Timing Role: Dual-channel driver actuating high-side N-channel MOSFETs for precision balancing current injection and main pack disconnect switches. Use Value: Independent VIA/VIB control allows asymmetric timing for balancing vs. safety cutoff; 8 V UVLO prevents false triggering during battery voltage sag. |
Use Scenario: Controls MOSFETs in string-level optimizers and central inverters for utility-scale photovoltaic plants. IC Role / Device Role / Timing Role: Dual isolated gate driver managing half-bridge switches in MPPT boost stages and grid-tie H-bridges operating at 1000 Vdc bus. Use Value: SOIC-16 narrow-body footprint saves PCB area in space-constrained outdoor enclosures; 125 °C rating sustains reliability in desert ambient conditions. |
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 |
|---|---|---|---|
| SI8238BD-AS | 5.0 kVRMS isolation, SOIC-16 wide-body package, same 4.0 A output and dual-driver function. | Required where reinforced insulation per UL62368-1 or IEC60601-1 (2 MOPP) is mandated for medical or industrial safety standards. | Select SI8238BD-AS when higher isolation voltage is needed; SI8238BB-AS1R remains optimal for cost-sensitive automotive OBCs with 2.5 kVRMS compliance. |
| UCC5390SCD | TI part with 5.7 kVRMS isolation, integrated Miller clamp, and 10 A peak output; requires external VDD regulation. | Preferred in high-power traction inverters needing active Miller clamping to prevent spurious turn-on during high dv/dt events. | Choose UCC5390SCD only if Miller clamping is required; SI8238BB-AS1R offers simpler layout and lower BOM count for standard dual-drive use cases. |
Compared with SI8238BD-AS, SI8238BB-AS1R trades 2.5 kVRMS isolation for smaller SOIC-16 narrow-body footprint and lower cost - ideal for space-constrained automotive modules. Versus UCC5390SCD, it omits Miller clamping but simplifies power delivery with native 4.5–24 V operation and no external LDO needed.
Availability
SI8238BB-AS1R is available at Aetrix Electronics and suitable for onboard chargers, traction inverters, and battery management systems requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8238BB-AS1R 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 for automotive, industrial, and wireless markets.
The Si823x family was designed specifically for high-reliability isolated gate driving in EV power electronics, emphasizing AEC-Q100 qualification, RF-based noise immunity, and flexible dual/high-side-low-side configurations.
FAQ
What is the isolation voltage rating of the SI8238BB-AS1R?
The SI8238BB-AS1R has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, validated for one-minute withstand testing. This rating supports safe operation in 400 Vdc automotive systems and meets reinforced insulation requirements under IEC 62368-1. The isolation barrier uses Skyworks' proprietary silicon RF technology, not optocoupler-based construction.
Does the SI8238BB-AS1R include programmable dead time?
No, the SI8238BB-AS1R does not include programmable dead time or overlap protection. As a dual-driver variant (not high-side/low-side), it responds immediately to input transitions - VOA follows VIA and VOB follows VIB with no internal delay. Dead time must be implemented externally in the controller logic or gate-resistor network.
What are the UVLO thresholds for SI8238BB-AS1R?
The SI8238BB-AS1R has fixed undervoltage lockout thresholds of 8 V (rising) and 7 V (falling) on all three supply rails: VDDI, VDDA, and VDDB. This ensures consistent behavior during automotive cold-crank events and prevents erroneous output states when any supply drops below operational range.
Can SI8238BB-AS1R drive SiC MOSFETs directly?
Yes, the SI8238BB-AS1R's 4.0 A peak source/sink current and 45 ns propagation delay enable direct gate driving of common 1200 V SiC MOSFETs (e.g., C3M0065090D, SCT3040KL) in hard-switched topologies up to 200 kHz. No external gate boosters are required for typical gate charges ≤50 nC.
Is SI8238BB-AS1R pin-compatible with other Si823x variants?
SI8238BB-AS1R shares the same SOIC-16 narrow-body pinout with all Si823x "BB" and "AB" dual-driver variants (e.g., SI8238AB-AS1, SI8237BB-AS1). However, it is not pin-compatible with high-side/low-side variants (e.g., SI8233BB-AS1) due to different internal routing of DT and PWM pins - always verify against Skyworks' official pinout diagrams before board reuse.
SI8238BB-AS1R 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):
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8238BB-AS1R FAQ
1.How can I place an order for SI8238BB-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8238BB-AS1R 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 SI8238BB-AS1R reliable?
The price and inventory of SI8238BB-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8238BB-AS1R is usually 5 days.
3.What payment methods are accepted for SI8238BB-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8238BB-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8238BB-AS1R?
SI8238BB-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8238BB-AS1R 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 SI8238BB-AS1R?
For technical support, including SI8238BB-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8238BB-AS1R requirements.
6.How does Aetrix verify that SI8238BB-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8238BB-AS1R 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 SI8238BB-AS1R meets industry standards.
7.What is the process for return or replacement of SI8238BB-AS1R?
All SI8238BB-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8238BB-AS1R, 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 SI8238BB-AS1R part is unused and in its original packaging.
Return procedure for SI8238BB-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8238BB-AS1R Tags
.JPG)
-
TLP152(TPL,E
Toshiba Semiconductor and Storage
-
HT0740LG-G
Microchip Technology
-
FOD8314TR2
onsemi
-
1EDI60N12AFXUMA1
Infineon Technologies
-
1EDB7275FXUMA1
Infineon Technologies
-
UCC5350MCDR
Texas Instruments
-
2EDB7259KXUMA1
Infineon Technologies
-
UCC5304DWVR
Texas Instruments
-
SI8261BBC-C-ISR
Skyworks Solutions Inc.
-
HT0440LG-G
Microchip Technology
-
HCPL-0302-500E
Broadcom Limited
-
STGAP2HSCMTR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
