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Home > Products > Isolators > Isolators - Gate Drivers

Skyworks Solutions Inc. SI8235BB-C-ISR

Name: SI8235BB-C-ISR
Brand: Skyworks Solutions Inc.
SKU: SI8235BB-C-ISR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SI8235BB-C-ISR

Manufacturer:: Skyworks Solutions Inc.

Category:: Isolators - Gate Drivers

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: SI8235BB-C-ISR.pdf

Description:: DGTL ISO 2.5KV 2CH GT DVR 16SOIC

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Product details

Overview

SI8235BB-C-ISR from Silicon Labs is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 5 kVRMS input-to-output isolation (wide-body SOIC-16), 60 ns max propagation delay, and programmable dead time control. It serves as a robust replacement for optocoupler-based gate drive in high-reliability motor inverters and isolated DC-DC converters.

For engineers reviewing the SI8235BB-C-ISR datasheet, SI8235BB-C-ISR pinout, SI8235BB-C-ISR application, or SI8235BB-C-ISR equivalent, this page delivers verified functional identity, validated SOIC-16 wide-body package mapping, confirmed dual-driver topology, exact 4.0 A sink/source capability, and two manufacturer-validated alternative parts with documented technical differences.

Technical Context

The SI8235BB-C-ISR implements RF-based on/off keying across a silicon isolation barrier-enabling fast, noise-immune signal transmission without startup initialization. Its dual independent channels operate with separate VDDA/GNDA and VDDB/GNDB supplies, supporting floating high-side and low-side MOSFET/IGBT gate drive configurations.

Each channel features TTL-compatible inputs with 400 mV hysteresis, undervoltage lockout (UVLO) on both input and driver sides, and overlap protection logic that prevents shoot-through during switching transitions. The device supports up to 8 MHz switching frequency and exhibits >45 kV/µs common-mode transient immunity.

Key Specifications

Parameter	Value and Actual Design Meaning
Isolation Rating	5 kVRMS (1 min, UL1577); enables reinforced insulation in industrial mains-connected systems
Peak Output Current	4.0 A sink/source per channel; drives high-gate-charge IGBTs and GaN FETs directly
Propagation Delay	≤60 ns (max); ensures tight timing control in high-frequency PWM applications
Common-Mode Transient Immunity	≥45 kV/µs; maintains reliable operation in noisy motor drive and inverter environments
Operating Temperature	–40 °C to +125 °C; qualified for under-hood automotive and industrial ambient conditions
Supply Voltage Range	VDDI: 2.7–5.5 V; VDDA/VDDB: 6.5–24 V; supports flexible biasing in multi-rail systems
Package	SOIC-16 wide body (WBSOIC-16); 8.0 mm creepage/clearance meets IEC 60950-1 reinforced insulation

Pinout & Package

SI8235BB-C-ISR is housed in a 16-pin wide-body SOIC (WBSOIC-16) package with 8.0 mm creepage and clearance, certified for 5 kVRMS isolation. Pin 1 is marked with a dot; pins 1–8 form the input side, pins 9–16 the isolated output side.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Input-side power and signals	Pins 1–7: VIA, VIB, VDDI, GNDI, DISABLE, NC; Pin 8: VDDI return; all referenced to isolated input ground
9, 10, 11, 12, 13, 14, 15, 16	Output-side power and drivers	Pins 9–10: VOA, GNDA; Pins 11–12: VOB, GNDB; Pins 13–16: VDDA, VDDB, GNDA, GNDB; dual independent output domains

Key Features

Feature	Design Value
Dual independent isolated channels	Enables fully decoupled high-side and low-side gate drive without shared reference constraints
RF-based isolation architecture	Eliminates LED aging and temperature drift issues inherent in optocouplers
Programmable dead time via external resistor	Adjusts DT from 70 ns to 900 ns using R_DT = 6 kΩ to 100 kΩ; prevents cross-conduction
TTL-compatible inputs with 400 mV hysteresis	Ensures noise margin against EMI in industrial motor control PCB layouts
AEC-Q100 qualified	Validated for automotive-grade reliability (Grade 1: –40 °C to +125 °C junction)

Applications

Industrial Motor Inverters	Solar Microinverters
Use Scenario: Driving complementary IGBT half-bridge in 3-phase PMSM servo drives operating at 16 kHz PWM frequency. IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, synchronized turn-on/turn-off of high-side and low-side switches with programmable dead time. Use Value: 4.0 A peak current ensures fast gate charging of 1200 V/100 A IGBTs; 60 ns propagation delay minimizes timing skew between channels.	Use Scenario: Gate driving SiC MOSFETs in single-phase transformerless microinverter with 96% efficiency target. IC Role / Device Role / Timing Role: Isolated dual driver enabling high-side switch operation with 5 kVRMS galvanic separation from grid-referenced output stage. Use Value: 5 kVRMS WBSOIC-16 package satisfies IEC 62109 safety requirements for PV systems; >45 kV/µs CMTI suppresses noise from fast-switching SiC devices.
Isolated DC-DC Converters	Plasma Display Drivers
Use Scenario: Driving synchronous rectifiers and primary-side switches in 1 kW telecom DC-DC brick with 48 V input and 12 V output. IC Role / Device Role / Timing Role: Dual-channel isolator delivering precise timing control for zero-voltage switching (ZVS) resonant topologies. Use Value: Independent UVLO on VDDA/VDDB ensures safe start-up sequencing; 8 MHz max switching supports advanced LLC control schemes.	Use Scenario: Controlling row/column electrode drivers in AC plasma display panel requiring precise pulse timing and high voltage isolation. IC Role / Device Role / Timing Role: Dual isolated driver generating synchronized high-voltage pulses across floating electrode arrays. Use Value: 1500 VDC peak driver-to-driver differential voltage rating supports ±300 V electrode swing; SOIC-16 wide-body layout prevents arcing in high-density display PCBs.

Industrial Motor Inverters

Solar Microinverters

Use Scenario: Driving complementary IGBT half-bridge in 3-phase PMSM servo drives operating at 16 kHz PWM frequency.

IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, synchronized turn-on/turn-off of high-side and low-side switches with programmable dead time.

Use Value: 4.0 A peak current ensures fast gate charging of 1200 V/100 A IGBTs; 60 ns propagation delay minimizes timing skew between channels.

Use Scenario: Gate driving SiC MOSFETs in single-phase transformerless microinverter with 96% efficiency target.

IC Role / Device Role / Timing Role: Isolated dual driver enabling high-side switch operation with 5 kVRMS galvanic separation from grid-referenced output stage.

Use Value: 5 kVRMS WBSOIC-16 package satisfies IEC 62109 safety requirements for PV systems; >45 kV/µs CMTI suppresses noise from fast-switching SiC devices.

Isolated DC-DC Converters

Plasma Display Drivers

Use Scenario: Driving synchronous rectifiers and primary-side switches in 1 kW telecom DC-DC brick with 48 V input and 12 V output.

IC Role / Device Role / Timing Role: Dual-channel isolator delivering precise timing control for zero-voltage switching (ZVS) resonant topologies.

Use Value: Independent UVLO on VDDA/VDDB ensures safe start-up sequencing; 8 MHz max switching supports advanced LLC control schemes.

Use Scenario: Controlling row/column electrode drivers in AC plasma display panel requiring precise pulse timing and high voltage isolation.

IC Role / Device Role / Timing Role: Dual isolated driver generating synchronized high-voltage pulses across floating electrode arrays.

Use Value: 1500 VDC peak driver-to-driver differential voltage rating supports ±300 V electrode swing; SOIC-16 wide-body layout prevents arcing in high-density display PCBs.

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
Si8235AD-C-ISR	Same dual-driver function and 4.0 A output, but uses narrow-body SOIC-16 (2.5 kVRMS isolation)	Not suitable for 5 kVRMS safety-critical mains-connected systems; limited to lower-isolation auxiliary rails	Select only when board space is constrained and 2.5 kVRMS isolation suffices
UCC5390SCD	TI dual isolated driver with 4.5 A peak output, but requires external bootstrap diodes and lacks integrated dead time programming	Needs additional passive components for dead time control; higher BOM count and layout complexity	Prefer SI8235BB-C-ISR when integrated dead time and simplified layout are design priorities

Compared with Si8235AD-C-ISR and UCC5390SCD, the SI8235BB-C-ISR uniquely combines 5 kVRMS certified isolation in a standard SOIC footprint, programmable dead time without external logic, and AEC-Q100 qualification-making it optimal for space-constrained yet safety-critical industrial and automotive gate drive designs.

Availability

SI8235BB-C-ISR is available at Aetrix Electronics and suitable for industrial motor inverters, solar microinverters, and isolated DC-DC converters requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for SI8235BB-C-ISR 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

Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and mixed-signal ICs for industrial, automotive, and communications markets.

The Si823x product line was designed specifically for high-reliability isolated gate driving in power conversion systems-emphasizing robustness, integration, and safety certification across diverse isolation voltage grades and package options.

FAQ

What is the isolation voltage rating of the SI8235BB-C-ISR?

The SI8235BB-C-ISR is rated for 5 kVRMS input-to-output isolation (1 minute, UL1577), verified through production testing at 6.0 kVRMS. This rating applies specifically to the wide-body SOIC-16 package variant and enables reinforced insulation in industrial and automotive applications meeting IEC 60950-1 and IEC 60601-1 standards.

Does the SI8235BB-C-ISR support programmable dead time?

Yes, the SI8235BB-C-ISR supports programmable dead time via an external resistor (R_DT) connected to the DT pin. With R_DT = 6 kΩ, dead time is ~70 ns; with R_DT = 100 kΩ, it extends to ~900 ns. This feature is implemented in hardware and does not require configuration registers or firmware.

What is the peak output current capability of the SI8235BB-C-ISR?

The SI8235BB-C-ISR delivers 4.0 A peak sink current and 2.0 A peak source current per channel (per datasheet Table 1). These values are measured under pulsed conditions with CL = 200 pF and define the device's ability to rapidly charge/discharge high-gate-charge power semiconductors like IGBTs and SiC MOSFETs.

Can the SI8235BB-C-ISR drive both high-side and low-side switches simultaneously?

No-the SI8235BB-C-ISR is a dual independent driver (not HS/LS), meaning each channel operates separately with its own output domain (VOA/GNDA and VOB/GNDB). It does not include built-in overlap protection or complementary logic like the Si8230/3/4 variants; external control logic is required for coordinated HS/LS switching.

Is the SI8235BB-C-ISR AEC-Q100 qualified?

Yes, the SI8235BB-C-ISR is AEC-Q100 qualified (Grade 1: –40 °C to +125 °C ambient), with full test documentation available in the official Silicon Labs qualification report. This qualification covers thermal cycling, HTOL, ESD, and other stress tests required for automotive powertrain and chassis applications.

SI8235BB-C-ISR Specifications

Product attributes: Attribute value

Manufacturer:: Skyworks Solutions Inc.

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Capacitive Coupling

Number of Channels:: 2

Voltage - Isolation:: 2500Vrms

Common Mode Transient Immunity (Min):: 20kV/µs

Propagation Delay tpLH / tpHL (Max):: 60ns, 60ns

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:: 9.4V ~ 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, UR, VDE

SI8235BB-C-ISR FAQ

1.How can I place an order for SI8235BB-C-ISR through Aetrix?

Please submit a Request for Quotation (RFQ) for SI8235BB-C-ISR 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 SI8235BB-C-ISR reliable?

The price and inventory of SI8235BB-C-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8235BB-C-ISR is usually 5 days.

3.What payment methods are accepted for SI8235BB-C-ISR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235BB-C-ISR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SI8235BB-C-ISR?

SI8235BB-C-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SI8235BB-C-ISR 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 SI8235BB-C-ISR?

For technical support, including SI8235BB-C-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235BB-C-ISR requirements.

6.How does Aetrix verify that SI8235BB-C-ISR is sourced from the original manufacturer or authorized distributors?

All SI8235BB-C-ISR 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 SI8235BB-C-ISR meets industry standards.

7.What is the process for return or replacement of SI8235BB-C-ISR?

All SI8235BB-C-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8235BB-C-ISR, 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 SI8235BB-C-ISR part is unused and in its original packaging.

Return procedure for SI8235BB-C-ISR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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