Skyworks Solutions Inc. SI8237AD-D-ISR

Overview

SI8237AD-D-ISR from Skyworks Solutions is a dual-channel isolated gate driver IC with 5 kVRMS input-to-output isolation, 0.5 A peak output current per channel, and TTL-compatible dual-input (VIA/VIB) logic interface. It operates across –40°C to +125°C, supports up to 8 MHz switching, and is designed for high-reliability isolated MOSFET/IGBT drive in half-bridge and dual-switch topologies.

For engineers reviewing the SI8237AD-D-ISR datasheet, SI8237AD-D-ISR pinout, SI8237AD-D-ISR application, or SI8237AD-D-ISR equivalent, this page delivers verified technical context, real-world design meaning of key specs, package-aware layout guidance, and validated alternative options for industrial and automotive power systems.

Technical Context

The SI8237AD-D-ISR implements two fully independent, galvanically isolated driver channels using Skyworks' proprietary silicon RF isolation barrier-enabling up to 5 kVRMS withstand voltage per UL1577 and 45 ns typical propagation delay. Each channel features TTL-level inputs with >400 mV hysteresis and operates with separate VDDA/VDDB supplies (4.5–24 V).

As a dual-driver variant (not HS/LS), it lacks programmable dead time or overlap protection but provides immediate, independent output transitions per Table 5. Its UVLO threshold is 5 V (VDDIUV+), and outputs default low during undervoltage or disable assertion-ensuring fail-safe gate control in power converters.

Key Specifications

Pinout & Package

SI8237AD-D-ISR is housed in a RoHS-compliant SOIC-16 wide-body package (10.3 mm × 10.3 mm, 2.3 mm height) with creepage ≥8.3 mm and clearance ≥8.3 mm-meeting reinforced insulation requirements for 5 kVRMS rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8232AD-D-IS, SI8237AD-D-ISR adds AEC-Q100 qualification and automotive documentation support; compared with ADUM4223BRIZ, it delivers 15 ns faster propagation, higher CMTI, and wider creepage-making it preferable for high-noise EV power stages and high-efficiency industrial SMPS.

Availability

SI8237AD-D-ISR is available at Aetrix Electronics and suitable for industrial motor control, solar inverters, automotive onboard chargers, and isolated DC-DC converters requiring stable component supply across extended temperature and high-reliability environments.

Supply support for SI8237AD-D-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

Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies for wireless, automotive, and industrial markets.

The Si823x family was engineered specifically for high-efficiency, high-reliability isolated gate driving in power conversion systems-delivering robust RF-based isolation, fast timing, and automotive-grade qualification in compact packages.

FAQ

What is the isolation voltage rating of SI8237AD-D-ISR and which safety standards does it meet?

The SI8237AD-D-ISR provides 5.0 kVRMS input-to-output isolation per UL1577, certified for reinforced insulation under CSA 62368-1 and GB4943.1, and meets VDE 60747-17 basic insulation requirements. This enables its use in 1000 VAC mains-connected equipment and automotive high-voltage systems where double or reinforced insulation is mandated.

Does SI8237AD-D-ISR support programmable dead time like other Si823x variants?

No, SI8237AD-D-ISR does not support programmable dead time or overlap protection because it is a dual-driver configuration (Si8232/7 family), not a high-side/low-side variant. As confirmed in Table 2 and Section 2.5.2, dead time features are exclusive to Si8230/1/3/4 devices. SI8237AD-D-ISR provides independent, simultaneous channel control with no built-in interlock.

What is the recommended PCB layout practice for SI8237AD-D-ISR to maintain 5 kVRMS isolation integrity?

To preserve 5 kVRMS isolation, maintain ≥8.3 mm creepage and clearance between input-side (pins 1–8) and output-side (pins 9–16) copper, use slotting or isolation gaps in inner layers, and avoid routing traces across the isolation barrier. Place 0.1 µF ceramic bypass capacitors within 2 mm of each VDD pin (VDDI, VDDA, VDDB) and connect GNDI/GNDA/GNDB to separate ground planes tied only at a single point.

Can SI8237AD-D-ISR drive SiC MOSFETs directly, and what gate resistance is recommended?

Yes, SI8237AD-D-ISR's 0.5 A peak output current supports direct drive of common 650 V/1200 V SiC MOSFETs (e.g., C3M0065090D, SCT3040KL) at switching frequencies up to 200 kHz. For optimal dV/dt control and ringing suppression, use RG = 5–10 Ω in series with the gate, verified via oscilloscope measurement of gate voltage overshoot and Miller plateau duration in the target application.

Is SI8237AD-D-ISR pin-compatible with other Si823x dual-driver variants such as Si8232AD-D-IS?

Yes, SI8237AD-D-ISR is pin-compatible with Si8232AD-D-IS and all other SOIC-16 wide-body Si823x dual-driver variants (Si8232/7/8). Pin functions, spacing, thermal pad absence, and footprint match exactly-enabling drop-in replacement where UVLO (5 V vs. 8 V) and qualification (AEC-Q100 vs. industrial-only) align with system requirements.