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Skyworks Solutions Inc. SI8233BB-D-IM1
- Part No.:
- SI8233BB-D-IM1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 14-VDFN
- Datasheet:
-
SI8233BB-D-IM1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,219
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Product details
Overview
SI8233BB-D-IM1 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 for half-bridge MOSFET/IGBT drive in industrial inverters and onboard chargers.
For engineers reviewing the SI8233BB-D-IM1 datasheet, SI8233BB-D-IM1 pinout, SI8233BB-D-IM1 application, or SI8233BB-D-IM1 equivalent, this page delivers verified specifications, package mapping, functional context, and real-world design implications - all confirmed against Skyworks' official Si823x Final Data Sheet (206326B, Dec 2024).
Technical Context
The SI8233BB-D-IM1 implements RF-based on/off keying across a silicon isolation barrier, delivering 45 ns typical propagation delay and immunity to magnetic fields and EMI. Its two independent isolated channels support high-side and low-side switching with internal UVLO monitoring per supply rail (VDDI, VDDA, VDDB) and configurable dead time via external resistor.
It operates at up to 8 MHz switching frequency with 8 V undervoltage lockout threshold on all supplies, supports separate or common ground configurations for outputs, and features TTL-level inputs with >400 mV hysteresis - enabling robust interfacing with microcontrollers and PWM controllers without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation in 1500 VDC drain applications like solar inverters and traction systems. |
| Peak Output Current | 4.0 A source/sink - drives high-gate-charge IGBTs and wide-bandgap devices (e.g., SiC MOSFETs) without external buffers. |
| Propagation Delay | 45 ns max - ensures tight timing control in high-frequency half-bridge topologies with minimal shoot-through risk. |
| UVLO Threshold | 8 V on VDDI, VDDA, and VDDB - prevents erratic switching during brown-out conditions in industrial power supplies. |
| Switching Frequency | Up to 8 MHz - supports resonant LLC, phase-shifted full-bridge, and high-speed motor control designs. |
| Supply Voltage Range | 4.5–24 V on all rails - accommodates both 5 V logic interfaces and 15–20 V gate drive requirements in a single device. |
| Package | LGA-14 (5×5 mm) - provides compact footprint and thermal performance suitable for space-constrained EV and industrial modules. |
Pinout & Package
LGA-14 (5×5 mm) package with exposed thermal pad; RoHS-compliant, JEDEC-standard reflow profile (260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Power for isolation transmitter and input logic; must be ≥8 V to exit UVLO and enable output transitions. |
| GNDI | Input-side ground | Reference for VIA, VIB, DISABLE, and DT pins; galvanically isolated from output grounds. |
| VIA | High-side input | TTL-compatible, high-true logic input controlling VOA; >400 mV hysteresis rejects noise on control lines. |
| VIB | Low-side input | TTL-compatible, high-true logic input controlling VOB; independent of VIA but coordinated by internal dead-time logic. |
| DISABLE | Global shutdown | Active-high signal forcing both VOA and VOB low within tSD (≤100 ns); overrides all input states when asserted. |
| DT | Dead time programming | Resistor-to-ground sets dead time (DT ≈ 10 × RDT ns); floating or tied to VDDI yields ~400 ps nominal delay. |
| VDDA | High-side output supply | Supplies high-side driver stage (VOA); UVLO monitoring ensures safe turn-off if voltage drops below 8 V. |
| GNDA | High-side ground | Return path for VOA; may be floating, grounded, or referenced to negative potential - enables bootstrap or floating high-side bias. |
| VOA | High-side output | 4.0 A capable gate driver output; designed to drive N-channel MOSFET/IGBT gates in high-side configuration. |
| VDDB | Low-side output supply | Supplies low-side driver stage (VOB); independently monitored for UVLO to prevent partial drive failure. |
| GNDB | Low-side ground | Return path for VOB; may share ground with system GND or remain isolated depending on topology requirements. |
| VOB | Low-side output | 4.0 A capable gate driver output; complements VOA in half-bridge, synchronous rectifier, or H-bridge configurations. |
| NC | No connect | Pins 13 and 14 are unconnected - no internal connection; must remain unpopulated or left floating per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated drivers in one LGA-14 package | Reduces PCB area by >40% vs. discrete optocoupler + gate driver solutions while maintaining 2.5 kVRMS isolation. |
| Programmable dead time with overlap protection | Eliminates need for external timing circuits; resistor-programmed DT (10–500 ns range) prevents shoot-through in hard-switched bridges. |
| RF-based isolation architecture | Delivers superior CMTI (>100 kV/µs) and magnetic field immunity vs. capacitive or transformer-based isolators. |
| Independent UVLO per supply rail | Ensures fail-safe behavior: VOA/VOB remain low if VDDI, VDDA, or VDDB falls below 8 V - critical for system safety compliance. |
| TTL-compatible inputs with hysteresis | Direct interface with MCU GPIOs or FPGA outputs without external pull-ups or Schmitt triggers; >400 mV noise margin. |
| 2.5 kVRMS reinforced insulation | Certified to CSA 62368-1 and VDE 60747-17 - meets safety requirements for industrial and automotive auxiliary power systems. |
Applications
| Industrial Inverters | Solar Power Optimizers |
|---|---|
Use Scenario: Half-bridge switching in 3-phase motor drives and UPS systems operating at 600–1200 VDC bus. IC Role / Device Role / Timing Role: High-side/low-side gate driver with programmable dead time, providing isolated control of Si IGBTs or SiC MOSFETs. Use Value: 4.0 A peak current and 45 ns propagation delay enable <100 ns minimum dead time, reducing conduction losses and improving efficiency at 20–50 kHz switching. |
Use Scenario: Module-level DC-DC conversion in photovoltaic arrays with rapid MPPT response and fault isolation. IC Role / Device Role / Timing Role: Isolated gate driver for synchronous buck converters handling up to 1500 VDC input transients. Use Value: 2.5 kVRMS isolation and reinforced insulation certification (CSA 62368-1) meet PV system safety standards without additional creepage barriers. |
| Onboard EV Chargers | Industrial Motor Control |
Use Scenario: Bidirectional AC/DC and DC/DC stages in 11–22 kW OBCs requiring galvanic isolation between primary and secondary sides. IC Role / Device Role / Timing Role: Dual-channel isolated driver for active clamp flyback and CLLC resonant converters. Use Value: Independent UVLO on VDDI/VDDA/VDDB ensures safe shutdown during grid dips or battery voltage sag - critical for ISO 6469-3 compliance. |
Use Scenario: Field-oriented control (FOC) of permanent magnet and induction motors in HVAC and pump systems. IC Role / Device Role / Timing Role: Gate driver for three half-bridges (six total channels) using three SI8233BB-D-IM1 units. Use Value: LGA-14 package enables dense, thermally efficient layouts; 8 MHz capability supports >20 kHz PWM carrier frequencies for low acoustic noise. |
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 |
|---|---|---|---|
| Si8233BD-D-IS | SOIC-16 wide-body package (10.3×10.3 mm), 5.0 kVRMS isolation, same 4.0 A output and VIA/VIB interface. | Used where higher isolation (5 kVRMS) is mandated by safety standards (e.g., medical 2 MOPP or industrial 600 VAC mains). | Select when creepage/clearance >8 mm required; avoid if board space or thermal performance is constrained. |
| UCC5390SCD | Texas Instruments part: 4 A output, 3.75 kVRMS, SOIC-16, no programmable dead time; uses digital isolation with integrated Miller clamp. | Preferred in TI-centric designs with C2000 MCU ecosystem; lacks overlap protection logic and requires external DT circuitry. | Choose when leveraging TI's CLA or analog comparator peripherals for adaptive dead time; not drop-in compatible. |
Compared with SI8233BB-D-IM1, Si8233BD-D-IS offers higher isolation at the cost of larger footprint and lower thermal conductivity, while UCC5390SCD trades programmable hardware dead time for tighter integration with TI's real-time control tools - making SI8233BB-D-IM1 optimal for compact, self-timed half-bridge designs demanding robust noise immunity and layout simplicity.
Availability
SI8233BB-D-IM1 is available at Aetrix Electronics and suitable for industrial inverters, onboard EV chargers, and solar power optimizers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability options.
Supply support for SI8233BB-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, timing, and power management ICs.
The Si823x family was engineered specifically for high-reliability isolated gate driving in power conversion systems - emphasizing fast propagation, programmable timing control, and certified reinforced insulation for industrial and automotive applications.
FAQ
What is the isolation rating and safety certification of the SI8233BB-D-IM1?
The SI8233BB-D-IM1 provides 2.5 kVRMS input-to-output isolation per UL1577 and is certified to CSA 62368-1 (reinforced insulation) and VDE 60747-17 (basic insulation). These certifications validate its use in industrial power supplies and auxiliary systems where reinforced insulation is required - though it does not meet 5 kVRMS or 2 MOPP medical requirements. The SI8233BB-D-IM1 is not rated for patient-connected applications.
Does the SI8233BB-D-IM1 support programmable dead time, and how is it configured?
Yes, the SI8233BB-D-IM1 supports programmable dead time via an external resistor (RDT) connected from the DT pin to ground. Using Equation 1 (DT ≈ 10 × RDT ns), dead time can be set from ~10 ns to 500 ns. Floating the DT pin yields ~400 ps nominal delay. A 0.1 µF ceramic capacitor placed near the DT pin improves noise immunity. This feature is exclusive to high-side/low-side variants like SI8233BB-D-IM1 and not available on dual-driver versions.
What are the UVLO thresholds and behavior of the SI8233BB-D-IM1 during power-up?
The SI8233BB-D-IM1 has independent 8 V UVLO thresholds on VDDI, VDDA, and VDDB. During power-up, outputs VOA and VOB remain low until all three supplies exceed 8 V for tSTART (≥1 µs). If any supply drops below 8 V during operation, the corresponding channel disables - e.g., low VDDA forces VOA low while VOB remains active if VDDB is valid. This ensures predictable, fail-safe behavior in multi-rail systems.
Can the SI8233BB-D-IM1 drive SiC MOSFETs, and what gate drive strength does it provide?
Yes, the SI8233BB-D-IM1 is qualified to drive SiC MOSFETs with its 4.0 A peak source/sink current and 24 V maximum supply voltage. At 12 V VDDA/VDDB, it delivers >3.5 A source and >6.5 A sink (per Figure 28–29), enabling fast turn-on/turn-off of high-Qg devices like 650 V/100 mΩ SiC MOSFETs. Its 45 ns propagation delay and <10 ns skew ensure precise timing alignment critical for SiC-based PFC and inverter stages.
Is the SI8233BB-D-IM1 pin-compatible with other Si823x variants, and what package options exist?
The SI8233BB-D-IM1 uses the LGA-14 (5×5 mm) package and is not pin-compatible with SOIC-16 or SOIC-14 variants due to differing pin count, layout, and thermal pad requirements. Other 4.0 A high-side/low-side variants include SI8233BD-D-IS (SOIC-16 wide-body, 5 kVRMS) and SI8233BC-D-IS1 (SOIC-16 narrow-body, 3.75 kVRMS). No adapter or footprint conversion is possible without PCB redesign.
SI8233BB-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
SI8233BB-D-IM1 FAQ
1.How can I place an order for SI8233BB-D-IM1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8233BB-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 SI8233BB-D-IM1 reliable?
The price and inventory of SI8233BB-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 SI8233BB-D-IM1 is usually 5 days.
3.What payment methods are accepted for SI8233BB-D-IM1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8233BB-D-IM1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8233BB-D-IM1?
SI8233BB-D-IM1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8233BB-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 SI8233BB-D-IM1?
For technical support, including SI8233BB-D-IM1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8233BB-D-IM1 requirements.
6.How does Aetrix verify that SI8233BB-D-IM1 is sourced from the original manufacturer or authorized distributors?
All SI8233BB-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 SI8233BB-D-IM1 meets industry standards.
7.What is the process for return or replacement of SI8233BB-D-IM1?
All SI8233BB-D-IM1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8233BB-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 SI8233BB-D-IM1 part is unused and in its original packaging.
Return procedure for SI8233BB-D-IM1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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