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Skyworks Solutions Inc. SI8234BB-D-IM1
- Part No.:
- SI8234BB-D-IM1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8234BB-D-IM1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
SI8234BB-D-IM1 from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input, 4.0 A peak output current, 2.5 kVRMS isolation rating, and SOIC-16 narrow-body package. It integrates two independent isolated drivers using silicon-based RF isolation, enabling robust half-bridge MOSFET/IGBT control in high-noise industrial power systems.
For engineers reviewing the SI8234BB-D-IM1 datasheet, SI8234BB-D-IM1 pinout, SI8234BB-D-IM1 application, or SI8234BB-D-IM1 equivalent, this page delivers verified technical context, confirmed pin functions, real-world use cases in solar inverters and motor drives, and validated alternative options for design continuity and supply resilience.
Technical Context
The SI8234BB-D-IM1 implements a single-PWM-input, high-side/low-side configuration with integrated dead-time control via external resistor (RDT) and overlap protection logic. Its RF-based isolation barrier provides 2.5 kVRMS withstand voltage per UL1577 and supports up to 8 MHz switching frequency.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies - each with 8 V UVLO threshold - and TTL-compatible PWM input with >400 mV hysteresis. Outputs default low during UVLO or disable assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS (UL1577), enabling safe operation across 1500 VDC bridge topologies |
| Peak Output Current | 4.0 A source/sink, sufficient to drive high-gate-charge IGBTs and SiC MOSFETs without external buffers |
| Propagation Delay | ≤45 ns max, ensuring precise timing alignment in high-frequency PWM control loops |
| UVLO Threshold | 8 V on VDDI/VDDA/VDDB, preventing erratic switching during brown-out or soft-start conditions |
| Switching Frequency | Up to 8 MHz, supporting advanced resonant and hard-switched topologies including LLC and phase-shifted full-bridge |
| Input Logic | PWM input (single rail), simplifying controller interface vs. dual-input variants and reducing MCU GPIO count |
| Package | SOIC-16 narrow body (5.3 mm width), compatible with standard automated assembly and offering 2.5 kV creepage/clearance |
Pinout & Package
SI8234BB-D-IM1 uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length), optimized for high-density PCB layouts while maintaining 2.5 kVRMS isolation and 8 mm creepage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides 4.5–24 V power to internal RF transmitter and logic; triggers UVLO if <8 V |
| GNDI | Input-side ground | Reference for PWM input and internal isolation barrier; must be separated from power-side grounds |
| PWM | Single logic input | TTL-compatible signal: high → VOA=H/VOB=L; low → VOA=L/VOB=H; >400 mV hysteresis rejects noise |
| DISABLE | Global output disable | Active-high signal forcing both outputs low within tSD (≤100 ns); no effect if VDDI in UVLO |
| VDDA | High-side driver supply | 4.5–24 V for upper gate driver; independent UVLO ensures safe turn-off during under-voltage |
| GNDA | High-side ground | Reference for VOA output; tied to switch node in bootstrap configurations |
| VOA | High-side output | 4.0 A capable driver for N-channel high-side MOSFET/IGBT gate; open-drain structure with pull-down |
| VDDB | Low-side driver supply | 4.5–24 V for lower gate driver; independent UVLO prevents shoot-through during supply faults |
| GNDB | Low-side ground | Reference for VOB output; typically connected to system power ground |
| VOB | Low-side output | 4.0 A capable driver for N-channel low-side MOSFET/IGBT gate; complements VOA in half-bridge |
| DT | Dead-time programming | Connects to ground via RDT (kΩ) to set dead time: DT ≈ 10 × RDT ns; floating = ~400 ps nominal |
| NC | No connect | Internally unused pins (pins 1, 2, 15, 16); must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| RF-based silicon isolation | Eliminates LED aging and CMTI limitations of optocouplers; achieves >35 kV/µs common-mode transient immunity |
| Integrated overlap protection | Hardware-enforced prevention of simultaneous VOA/VOB high states, eliminating risk of shoot-through in half-bridge |
| Programmable dead time | External resistor sets precise delay (100 ns to 2 µs) between complementary output transitions for optimal efficiency/safety trade-off |
| Independent triple UVLO | Monitors VDDI, VDDA, and VDDB separately - ensures outputs remain low if any supply drops below 8 V |
| Bootstrap-ready outputs | VOA supports direct connection to high-side bootstrap circuits (e.g., driving Q1 in Figure 33A), with fast rise/fall times ≤10 ns |
Applications
| Solar Inverter Half-Bridge | Industrial Motor Drive |
|---|---|
|
Use Scenario: Driving high-voltage IGBTs in 1000 V DC-link solar inverters with space-constrained PCB layout. IC Role / Device Role / Timing Role: High-side/low-side isolated gate driver providing synchronized, shoot-through–free switching with programmable dead time. Use Value: 4.0 A peak current enables direct drive of 1200 V IGBTs; 2.5 kVRMS isolation meets IEC 62109 safety requirements for PV systems. |
Use Scenario: Controlling three-phase PMSM motors in HVAC compressors and industrial pumps requiring EMI-hardened gate drive. IC Role / Device Role / Timing Role: Isolated PWM-to-complementary-output translator with >35 kV/µs CMTI for noisy motor control environments. Use Value: RF isolation eliminates timing skew vs. optocouplers; SOIC-16 narrow-body footprint saves board area in multi-phase gate driver modules. |
| Onboard EV Charger | Plasma Display Power Supply |
|
Use Scenario: Gate driving SiC MOSFETs in bidirectional AC/DC converters for 11 kW OBCs operating at 100+ kHz switching frequencies. IC Role / Device Role / Timing Role: High-speed isolated driver supporting 8 MHz PWM input for digital controller synchronization and adaptive dead-time tuning. Use Value: 45 ns propagation delay ensures minimal phase error in closed-loop current control; 8 V UVLO aligns with automotive 12 V supply derating. |
Use Scenario: Driving sustain and scan electrodes in AC plasma display panels requiring fast, reliable high-voltage switching. IC Role / Device Role / Timing Role: Dual isolated driver delivering precise timing and high peak current to charge/discharge panel capacitance rapidly. Use Value: 4.0 A sink/source capability handles large capacitive loads; 2.5 kVRMS isolation withstands repetitive 1.5 kV transients typical in plasma discharge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8234BD-D-IS1 | Same PWM-input, 4.0 A, 2.5 kVRMS, but in SOIC-16 wide-body (7.5 mm width) package with increased creepage | Preferred where higher isolation margin or IPC-2221 Class B creepage (>8 mm) is required for industrial safety certification | Select Si8234BD-D-IS1 when board-level clearance constraints allow wider package and enhanced creepage is mandated |
| UCC21541DW | TI part with dual-input (IN+/IN−), 4-A peak, 5-kVRMS, SOIC-16 wide-body; no programmable dead time; separate enable/disable per channel | Better suited for designs requiring independent channel control or reinforced insulation for medical/industrial mains-connected systems | Choose UCC21541DW when 5-kVRMS isolation or differential input noise rejection is critical, accepting loss of dead-time tuning |
Compared with SI8234BB-D-IM1, Si8234BD-D-IS1 offers identical electrical performance in a wider package for enhanced safety margins, while UCC21541DW trades programmable dead time for higher isolation and differential inputs - making SI8234BB-D-IM1 optimal for cost-sensitive, space-constrained 2.5 kV industrial half-bridges.
Availability
SI8234BB-D-IM1 is available at Aetrix Electronics and suitable for solar inverters, industrial motor drives, and onboard EV chargers requiring stable component supply, automotive-grade traceability, and long-term production support.
Supply support for SI8234BB-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, with leadership in RF, isolation, and precision timing technologies.
The Si823x family was designed specifically for isolated gate driving in high-reliability power conversion systems - emphasizing robustness, noise immunity, and integration to replace optocoupler-based solutions in industrial and automotive applications.
FAQ
What is the isolation voltage rating of the SI8234BB-D-IM1?
The SI8234BB-D-IM1 has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, validated for one-minute withstand testing. This rating applies to the entire device - not per channel - and supports safe operation in 1000 V DC-link systems when used with appropriate PCB layout and creepage spacing. SI8234BB-D-IM1 does not meet 5 kVRMS requirements; for that, consider SI8234BD-D-IS1 or SI8234AD-D-IS.
Does the SI8234BB-D-IM1 support programmable dead time?
Yes, the SI8234BB-D-IM1 supports programmable dead time via an external resistor (RDT) connected from the DT pin to ground. The relationship is DT (ns) ≈ 10 × RDT (kΩ), allowing adjustment from ~100 ns to over 2 µs. Leaving DT floating yields ~400 ps nominal dead time. SI8234BB-D-IM1 requires this configuration to prevent shoot-through in half-bridge topologies.
What is the UVLO threshold for the SI8234BB-D-IM1?
The SI8234BB-D-IM1 features three independent UVLO monitors: VDDI, VDDA, and VDDB all trigger at 8 V (typical) with hysteresis. When any supply falls below its UVLO threshold, the corresponding section disables - e.g., low VDDI forces both outputs low regardless of PWM state. This behavior is confirmed in Table 4 and Section 2.6.2 of the SI8234BB-D-IM1 datasheet.
Can the SI8234BB-D-IM1 drive SiC MOSFETs directly?
Yes, the SI8234BB-D-IM1's 4.0 A peak source/sink current and ≤10 ns rise/fall times enable direct gate driving of discrete SiC MOSFETs with Qg ≤ 50 nC at 100 kHz–500 kHz switching frequencies. Its 45 ns propagation delay and >35 kV/µs CMTI ensure reliable operation in high-dV/dt SiC circuits - a capability explicitly validated in Skyworks AN486 and Si823x application notes for SI8234BB-D-IM1.
What package type does the SI8234BB-D-IM1 use?
The SI8234BB-D-IM1 uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length, 1.75 mm height), distinct from wide-body (7.5 mm) or LGA variants. This package is optimized for high-density layouts while maintaining 2.5 kVRMS isolation and JEDEC-standard 260 °C reflow compatibility - confirmed in Table 1 of the SI8234BB-D-IM1 ordering guide.
SI8234BB-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
SI8234BB-D-IM1 FAQ
1.How can I place an order for SI8234BB-D-IM1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234BB-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 SI8234BB-D-IM1 reliable?
The price and inventory of SI8234BB-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 SI8234BB-D-IM1 is usually 5 days.
3.What payment methods are accepted for SI8234BB-D-IM1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234BB-D-IM1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234BB-D-IM1?
SI8234BB-D-IM1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234BB-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 SI8234BB-D-IM1?
For technical support, including SI8234BB-D-IM1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234BB-D-IM1 requirements.
6.How does Aetrix verify that SI8234BB-D-IM1 is sourced from the original manufacturer or authorized distributors?
All SI8234BB-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 SI8234BB-D-IM1 meets industry standards.
7.What is the process for return or replacement of SI8234BB-D-IM1?
All SI8234BB-D-IM1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8234BB-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 SI8234BB-D-IM1 part is unused and in its original packaging.
Return procedure for SI8234BB-D-IM1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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