Skyworks Solutions Inc. SI8234AB-ASR

Overview

SI8234AB-ASR from Skyworks Solutions is an automotive-grade, isolated high-side/low-side gate driver IC with PWM input configuration, 4.0 A peak output current, 2.5 kVRMS isolation rating, and SOIC-16 narrow-body package - designed for half-bridge MOSFET/IGBT control in traction inverters and onboard chargers.

For engineers reviewing the SI8234AB-ASR datasheet, SI8234AB-ASR pinout, SI8234AB-ASR application, or SI8234AB-ASR equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive qualification (AEC-Q100), isolation safety certifications (UL, VDE, CSA), and real-world design implications for high-reliability power conversion systems.

Technical Context

The SI8234AB-ASR implements RF-based silicon isolation with a proprietary semiconductor barrier, enabling 45 ns propagation delay and robust immunity to magnetic fields and EMI. Its single PWM input drives complementary high-side and low-side outputs with integrated programmable dead time and overlap protection logic.

This device operates across –40°C to +125°C with independent UVLO monitoring on input (VDDI) and output (VDDA/VDDB) supplies, and supports disable-controlled forced-low output states. It uses TTL-compatible inputs with >400 mV hysteresis and requires no startup initialization.

Key Specifications

Pinout & Package

SI8234AB-ASR is housed in a 16-pin SOIC narrow-body package (7.5 mm × 10.3 mm, 1.27 mm pitch) with creepage ≥5.5 mm and clearance ≥5.0 mm per IEC 60664-1 for 2.5 kVRMS working voltage.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated gate driver applications.

Compared with SI8234AB-ASR, Si8234AD-ASR offers higher isolation margin at the cost of larger package footprint, while UCC5390SCDR trades integrated dead time for broader voltage tolerance and MCU co-design flexibility - making SI8234AB-ASR optimal for compact, automotive-certified half-bridge control where analog dead time tuning is preferred.

Availability

SI8234AB-ASR is available at Aetrix Electronics and suitable for traction inverters, onboard chargers, and battery management systems requiring stable component supply with full automotive traceability and long-term lifecycle support.

Supply support for SI8234AB-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, isolation, and precision timing technologies.

The Si823x family was engineered specifically for high-reliability isolated gate driving in automotive electrification and industrial power conversion - delivering silicon-isolation performance with AEC-Q100 compliance and safety certification out-of-the-box.

FAQ

What is the isolation voltage rating of the SI8234AB-ASR and which safety standards does it meet?

The SI8234AB-ASR has a 2.5 kVRMS input-to-output isolation rating per UL 1577. It is certified to CSA 62368-1 (reinforced insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1. These approvals validate its use in automotive and industrial systems requiring reinforced insulation barriers, including onboard chargers and traction inverters where galvanic separation between control and power domains is mandatory.

Does the SI8234AB-ASR support programmable dead time, and how is it configured?

Yes, the SI8234AB-ASR supports programmable dead time via the DT pin. A resistor (RDT) connected from DT to ground sets the delay using DT ≈ 10 × RDT (ns). For example, a 10 kΩ resistor yields ~100 ns dead time. The pin defaults to ~400 ps if left floating or tied to VDDI. A 0.1 µF ceramic capacitor placed near the DT pin improves noise immunity - a key requirement in high-dv/dt motor drive environments.

What is the operating temperature range for the SI8234AB-ASR, and is it qualified for automotive use?

The SI8234AB-ASR is rated for –40°C to +125°C ambient operation and is fully AEC-Q100 Grade 1 qualified. It undergoes automotive-specific manufacturing flows, including AIAG-compliant PPAP documentation, IMDS/CAMDS material reporting, and zero-defect methodology throughout design and production - confirming its suitability for EV traction inverters, onboard chargers, and other powertrain-critical applications.

How does the PWM input functionality work on the SI8234AB-ASR?

The SI8234AB-ASR accepts a single TTL-compatible PWM signal: when PWM = high, VOA goes high and VOB goes low; when PWM = low, VOA goes low and VOB goes high. This eliminates timing skew between high-side and low-side control signals and simplifies integration with microcontrollers lacking dual complementary PWM outputs - a critical advantage in space-constrained automotive ECUs.

Can the SI8234AB-ASR drive both SiC MOSFETs and IGBTs effectively?

Yes, the SI8234AB-ASR delivers 4.0 A peak source/sink current with <45 ns propagation delay and fast rise/fall times (<10 ns typical), enabling direct drive of high-gate-charge SiC MOSFETs (e.g., 1200 V/100 mΩ) and IGBTs (e.g., 1700 V/100 A) without external buffers. Its 24 V max VDDA/VDDB supports gate drive voltages up to 20 V, meeting recommended gate bias requirements for both device types.