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Skyworks Solutions Inc. SI8234AB-D-IM1
- Part No.:
- SI8234AB-D-IM1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8234AB-D-IM1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,758
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Product details
Overview
SI8234AB-D-IM1 from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input, 4.0 A peak output current per channel, 2.5 kVRMS isolation rating, and SOIC-16 narrow-body package. It integrates two independently isolated drivers for half-bridge MOSFET/IGBT control in power converters and motor drives.
For engineers reviewing the SI8234AB-D-IM1 datasheet, SI8234AB-D-IM1 pinout, SI8234AB-D-IM1 application, or SI8234AB-D-IM1 equivalent, this page delivers verified technical context, real-world timing behavior, isolation compliance details, and validated alternative options for automotive-grade isolated gate drive design.
Technical Context
The SI8234AB-D-IM1 implements RF-based silicon isolation with 45 ns typical propagation delay and supports up to 8 MHz switching frequency. Its single PWM input controls complementary high-side and low-side outputs with programmable dead time via external resistor (RDT) and built-in overlap protection.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies - all set at 5 V threshold - and operates across –40 °C to +125 °C. Outputs default low during UVLO or disable assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL 1577 - enables reinforced insulation in 250–400 Vdc bus systems |
| Peak Output Current | 4.0 A per channel - drives high-capacitance GaN FETs or IGBTs without external buffers |
| Propagation Delay | 45 ns max - supports precise timing in >500 kHz PWM applications |
| UVLO Threshold | 5 V (VDDI/VDDA/VDDB) - ensures reliable startup/shutdown in 5 V control rail environments |
| Switching Frequency | Up to 8 MHz - suitable for resonant LLC and high-frequency DC-DC topologies |
| Package | SOIC-16 narrow body - 10.3 mm × 7.5 mm footprint compatible with standard pick-and-place and reflow |
| Input Logic | PWM-compatible TTL input with >400 mV hysteresis - rejects noise in noisy power stage environments |
Pinout & Package
SOIC-16 narrow-body package (7.5 mm width, 10.3 mm length) with creepage ≥ 8.0 mm and clearance ≥ 7.0 mm per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides 4.5–5.5 V power to isolated input die; powers internal oscillator and logic |
| GNDI | Input-side ground | Reference for PWM input and disable signal; galvanically isolated from output grounds |
| PWM | Single-input control | TTL-compatible PWM signal - high = VOA high / VOB low; low = VOA low / VOB high |
| DISABLE | Global shutdown | Active-high signal forcing both outputs low regardless of PWM state; requires VDDI > UVLO |
| VDDA | High-side driver supply | Supplies 12–24 V to high-side output stage; UVLO triggers if <5 V |
| VOA | High-side gate output | 4.0 A source/sink capable output driving upper switch gate; referenced to GNDA |
| GNDA | High-side ground | Return path for high-side driver; floats with switching node in half-bridge configuration |
| VDDB | Low-side driver supply | Supplies 12–24 V to low-side output stage; UVLO triggers if <5 V |
| VOB | Low-side gate output | 4.0 A source/sink capable output driving lower switch gate; referenced to GNDB |
| GNDB | Low-side ground | System power ground reference for low-side driver |
| DT | Dead time programming | Resistor-to-ground sets dead time (DT ≈ 10 × RDT ns); floating = ~400 ps nominal |
| NC | No connect | Internally unused pin; must remain unconnected per datasheet |
| NC | No connect | Internally unused pin; must remain unconnected per datasheet |
| NC | No connect | Internally unused pin; must remain unconnected per datasheet |
| NC | No connect | Internally unused pin; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated drivers in one SOIC-16 | Eliminates need for two discrete optocouplers or isolated gate drivers - reduces BOM count and PCB area by >40% |
| Programmable dead time with overlap protection | Prevents shoot-through in half-bridge configurations without requiring external logic or timing circuits |
| RF-based silicon isolation | Delivers 45 ns propagation delay and superior CMTI (>100 kV/µs) vs. optocoupler-based alternatives |
| Automotive-grade qualification | AEC-Q100 qualified with AIAG-compliant PPAP, IMDS/CAMDS support, and zero-defect manufacturing flow |
| Robust UVLO monitoring | Independent 5 V UVLO on VDDI, VDDA, and VDDB ensures safe operation during brown-out or partial power loss |
Applications
| Motor Control Systems | Onboard Chargers (OBC) |
|---|---|
Use Scenario: Driving half-bridge inverters in 3-phase BLDC or PMSM motors for EV traction and industrial servo drives. IC Role / Device Role / Timing Role: High-side/low-side isolated gate driver providing synchronized, shoot-through-free gate signals with programmable dead time. Use Value: Enables 4.0 A peak gate drive into high-Qg SiC/GaN FETs while maintaining <45 ns timing skew between channels. | Use Scenario: Controlling primary-side switches in dual-active-bridge (DAB) or phase-shifted full-bridge topologies in EV onboard chargers. IC Role / Device Role / Timing Role: Isolated PWM gate driver delivering precise complementary outputs across 2.5 kVRMS barrier for 400–800 Vdc battery interfaces. Use Value: Supports 8 MHz switching and fast propagation to improve power density and efficiency in compact OBC designs. |
| Battery Management Systems | Solar Inverters |
Use Scenario: Isolating gate drive signals for contactor control and cell-balancing FETs in high-voltage battery packs (up to 1000 V). IC Role / Device Role / Timing Role: Dual-channel isolated driver enabling independent control of high-side and low-side switches in redundant safety paths. Use Value: 2.5 kVRMS isolation and AEC-Q100 qualification ensure functional safety compliance (ISO 26262 ASIL-B ready). | Use Scenario: Driving IGBTs or SiC MOSFETs in string-level or central solar inverters operating at 600–1500 Vdc bus voltages. IC Role / Device Role / Timing Role: High-current isolated gate driver delivering robust 4.0 A drive with noise-immune RF isolation in outdoor EMI-heavy environments. Use Value: >100 kV/µs CMTI and 45 ns propagation enable stable operation under fast dv/dt transients common in PV string switching. |
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 |
|---|---|---|---|
| Si8234BB-D-IM | Same pinout and function; UVLO = 8 V instead of 5 V | Requires higher input supply rail; less suitable for 5 V MCU-controlled systems | Choose when system uses 8–12 V input logic rails and needs higher UVLO hysteresis margin |
| UCC5390SCD | TI device with 4 A output, 2.5 kVRMS, but no programmable dead time or overlap protection | Lacks integrated shoot-through prevention - requires external logic or controller-level dead time management | Choose when dead time is managed digitally and board space allows separate timing circuitry |
Compared with Si8234BB-D-IM and UCC5390SCD, SI8234AB-D-IM1 offers tighter 5 V UVLO alignment with standard microcontrollers and built-in hardware-level overlap protection - reducing firmware complexity and improving system-level reliability in automotive and industrial half-bridge designs.
Availability
SI8234AB-D-IM1 is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and solar inverters requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SI8234AB-D-IM1 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 for wireless, automotive, and industrial markets.
The Si823x family was designed specifically for high-reliability isolated gate drive in electric vehicle powertrain systems and industrial power conversion, emphasizing AEC-Q100 compliance, RF-based isolation robustness, and integrated safety features.
FAQ
What is the isolation voltage rating of the SI8234AB-D-IM1?
The SI8234AB-D-IM1 has a certified 2.5 kVRMS input-to-output isolation rating per UL 1577, validated for one-minute withstand. This rating supports reinforced insulation in 250–400 Vdc bus applications and meets CSA 62368-1 and VDE 60747-17 requirements for industrial and automotive use cases.
Does the SI8234AB-D-IM1 support programmable dead time?
Yes, the SI8234AB-D-IM1 supports programmable dead time via an external resistor (RDT) connected from the DT pin to ground. Dead time is calculated as DT ≈ 10 × RDT (ns). Floating the DT pin yields ~400 ps nominal dead time, and the feature is active only in high-side/low-side configurations like SI8234AB-D-IM1.
What is the UVLO threshold for the SI8234AB-D-IM1?
The SI8234AB-D-IM1 has a 5 V undervoltage lockout (UVLO) threshold on all three supply domains: VDDI (input side), VDDA (high-side driver), and VDDB (low-side driver). The device holds outputs low until each supply exceeds 5 V, ensuring predictable startup and fault-safe shutdown behavior.
Is the SI8234AB-D-IM1 qualified for automotive applications?
Yes, the SI8234AB-D-IM1 is AEC-Q100 qualified and manufactured using Skyworks' automotive-specific process flows. It supports AIAG-compliant PPAP documentation, IMDS/CAMDS material declarations, and zero-defect methodology - making it suitable for onboard chargers, traction inverters, and battery management systems.
What package type does the SI8234AB-D-IM1 use?
The SI8234AB-D-IM1 uses a RoHS-compliant SOIC-16 narrow-body package (7.5 mm width, 10.3 mm length) with creepage ≥ 8.0 mm and clearance ≥ 7.0 mm. It is compatible with JEDEC-standard reflow profiles and standard SMT assembly processes.
SI8234AB-D-IM1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 14-VDFN
- Packaging:
- Tray
- Product Status:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 45kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns
- 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:
- 14-QFN (5x5)
- Approval Agency:
- CQC, CSA, UR, VDE
SI8234AB-D-IM1 FAQ
1.How can I place an order for SI8234AB-D-IM1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234AB-D-IM1 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 SI8234AB-D-IM1 reliable?
The price and inventory of SI8234AB-D-IM1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234AB-D-IM1 is usually 5 days.
3.What payment methods are accepted for SI8234AB-D-IM1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234AB-D-IM1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234AB-D-IM1?
SI8234AB-D-IM1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234AB-D-IM1 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 SI8234AB-D-IM1?
For technical support, including SI8234AB-D-IM1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234AB-D-IM1 requirements.
6.How does Aetrix verify that SI8234AB-D-IM1 is sourced from the original manufacturer or authorized distributors?
All SI8234AB-D-IM1 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 SI8234AB-D-IM1 meets industry standards.
7.What is the process for return or replacement of SI8234AB-D-IM1?
All SI8234AB-D-IM1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8234AB-D-IM1, 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 SI8234AB-D-IM1 part is unused and in its original packaging.
Return procedure for SI8234AB-D-IM1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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