Skyworks Solutions Inc. SI8230AB-ASR

Overview

SI8230AB-ASR from Skyworks Solutions is an automotive-grade, high-side/low-side isolated gate driver IC with 0.5 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, operates up to 8 MHz, and supports VDDI = 5 V UVLO threshold - designed for half-bridge MOSFET/IGBT drive in onboard chargers and battery management systems.

For engineers reviewing the SI8230AB-ASR datasheet, SI8230AB-ASR pinout, SI8230AB-ASR application, or SI8230AB-ASR equivalent, this page delivers verified technical context, real-world timing behavior, isolation compliance details (UL1577, VDE 60747-17), and validated alternative options for automotive power stage design.

Technical Context

The SI8230AB-ASR implements RF-based silicon isolation with a semiconductor barrier, enabling 45 ns typical propagation delay and robust immunity to magnetic fields and EMI. Its two independent isolated channels support high-side and low-side gate drive with shared input-side logic and separate output-side supplies (VDDA/VDDB).

It features integrated undervoltage lockout on all three power domains (VDDI, VDDA, VDDB), programmable dead time via external resistor (DT pin), and overlap protection that forces both outputs low during simultaneous high inputs - critical for preventing shoot-through in half-bridge topologies.

Key Specifications

Pinout & Package

SI8230AB-ASR uses a 16-pin SOIC narrow-body package (JEDEC MS-012) with 1.27 mm pitch, 10.3 mm × 7.5 mm footprint, and creepage/clearance optimized for 2.5 kVRMS isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side/low-side isolated gate drive applications.

Compared with SI8230AB-ASR, Si8230AD-ASR provides higher isolation for safety-critical systems but requires PCB redesign, while UCC21520QDWQ1 offers greater drive strength and protection features at the cost of higher complexity and price - making SI8230AB-ASR optimal for cost-sensitive, thermally constrained auxiliary power stages.

Availability

SI8230AB-ASR is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and charging station power stages requiring stable component supply, AEC-Q100 compliance, and 2.5 kVRMS isolation assurance.

Supply support for SI8230AB-ASR 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 infrastructure markets.

The Si823x family was engineered specifically for high-reliability isolated gate drive in electrified vehicle power systems - combining RF isolation, programmable timing, and AEC-Q100 qualification into compact SOIC packages.

FAQ

What is the isolation voltage rating of the SI8230AB-ASR?

The SI8230AB-ASR has a certified 2.5 kVRMS input-to-output isolation rating per UL 1577, validated for one-minute withstand. This rating applies to the entire device and supports reinforced insulation in 400 V DC bus applications. It does not meet 5.0 kVRMS requirements - for those, SI8230AD-ASR is the direct automotive-grade alternative.

Does the SI8230AB-ASR support PWM input mode?

No, the SI8230AB-ASR uses dual independent logic inputs (VIA and VIB) for high-side and low-side control. PWM input mode is exclusive to the Si8231xx and Si8234xx variants (e.g., SI8231AB-ASR). Using SI8230AB-ASR with a single PWM signal requires external logic to generate complementary signals with dead time.

What is the purpose of the DT pin on the SI8230AB-ASR?

The DT pin on the SI8230AB-ASR allows external resistor programming of dead time between VOA and VOB transitions. With DT = 10 × RDT (ns), a 10 kΩ resistor sets ~100 ns dead time. This prevents shoot-through in half-bridge configurations and replaces the need for external timing circuits or MCU-based delays.

How does the DISABLE function behave during UVLO conditions on SI8230AB-ASR?

When VDDI falls below its UVLO threshold (~4.5 V), the SI8230AB-ASR disables all outputs regardless of the DISABLE pin state. The DISABLE input only takes effect once VDDI is above UVLO - ensuring predictable low-state defaults during power-up, brownout, or shutdown sequences without unintended activation.

Is the SI8230AB-ASR pin-compatible with other Si823x variants?

Yes, all Si823x devices in SOIC-16 narrow-body packages - including SI8230AB-ASR, SI8230BB-ASR, and SI8230CB-ASR - share identical pinouts and footprints. However, electrical differences (isolation rating, UVLO threshold, peak current) require schematic and layout validation before substitution.