Skyworks Solutions Inc. SI8232DB-D-ISR

Overview

SI8232DB-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, TTL-compatible inputs with >400 mV hysteresis, and SOIC-16 wide-body RoHS-compliant packaging. It serves as a robust replacement for optocoupler-based gate drive in half-bridge MOSFET/IGBT control circuits for industrial inverters and motor drives.

For engineers reviewing the SI8232DB-D-ISR datasheet, SI8232DB-D-ISR pinout, SI8232DB-D-ISR application, or SI8232DB-D-ISR equivalent, this page delivers verified functional identity, confirmed isolation rating, validated dual-driver architecture, exact UVLO threshold (8 V), and real-world timing behavior including 45 ns propagation delay and absence of internal dead time - all critical for safe high-frequency switching design.

Technical Context

The SI8232DB-D-ISR implements two fully independent isolated channels using Skyworks' proprietary silicon RF isolation barrier, enabling operation with separate or common secondary-side grounds. Each channel features TTL-level inputs (VIA/VIB), independent undervoltage lockout (UVLO) monitoring on VDDA and VDDB, and outputs capable of driving MOSFET/IGBT gates directly at up to 8 MHz switching frequency.

Unlike HS/LS variants (e.g., SI8230/3), the SI8232DB-D-ISR lacks programmable dead time and overlap protection - its truth table confirms immediate, non-overlapping output transitions (VOA/VOB follow VIA/VIB states without delay), making it suitable for synchronous rectification, isolated DC-DC controllers, and dual low-side gate drive where timing independence is required.

Key Specifications

Pinout & Package

SI8232DB-D-ISR uses a 16-pin SOIC wide-body package (10.3 mm × 7.5 mm, 2.65 mm height) with creepage ≥8.3 mm and clearance ≥8.3 mm, rated for 5 kVRMS isolation. Pin functions are validated per Skyworks Si823x datasheet Figure 3 and Table 5.

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, the SI8232DB-D-ISR provides higher system-level safety margin via 5 kVRMS isolation and more robust startup behavior with 8 V UVLO; versus ISO5852SMDR, it offers simpler layout (no Miller clamp routing), lower quiescent current, and deterministic timing without adaptive delay circuits.

Availability

SI8232DB-D-ISR is available at Aetrix Electronics and suitable for industrial inverters, solar MPPT converters, server PSUs, and automotive onboard chargers requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified alternatives.

Supply support for SI8232DB-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 designed specifically for high-reliability isolated gate drive in power conversion systems - emphasizing low propagation delay, high CMTI (>35 kV/µs), and safety-certified reinforcement across industrial and automotive applications.

FAQ

What is the isolation voltage rating of the SI8232DB-D-ISR?

The SI8232DB-D-ISR has a certified 5.0 kVRMS input-to-output isolation rating per UL 1577, validated for one-minute withstand. This enables use in reinforced insulation applications up to 1000 VAC working voltage, including industrial motor drives and solar inverters compliant with IEC 62368-1 and IEC 60601-1 standards. The isolation barrier is based on Skyworks' proprietary silicon-dielectric technology, not optocoupler-based.

Does the SI8232DB-D-ISR include programmable dead time?

No, the SI8232DB-D-ISR does not include programmable dead time or overlap protection logic. As a dual-driver variant (not HS/LS), it implements direct input-to-output mapping: VIA controls VOA and VIB controls VOB with no intentional delay. This is confirmed in Table 5 of the Si823x datasheet and enables precise external timing control in applications like synchronous rectification and multi-phase converters where internal dead time would degrade performance.

What are the UVLO thresholds for the SI8232DB-D-ISR?

The SI8232DB-D-ISR features independent undervoltage lockout on all three supply domains: VDDI (input side), VDDA (output channel A), and VDDB (output channel B). For VDDA and VDDB, the rising UVLO threshold is 8.0 V ±0.3 V and falling threshold is 7.5 V ±0.3 V. On VDDI, UVLO+ is 4.5 V and UVLO− is 4.0 V. These values ensure reliable disablement during brown-out events in industrial 12 V/15 V gate drive rails.

Can the SI8232DB-D-ISR drive both high-side and low-side MOSFETs in a half-bridge?

No - the SI8232DB-D-ISR is a dual-channel *independent* driver, not a high-side/low-side (HS/LS) driver. It cannot inherently prevent shoot-through in half-bridge configurations because it lacks internal dead time or overlap protection. For half-bridge use, HS/LS variants like SI8230BD-D-IS or SI8233BD-D-IS are required. SI8232DB-D-ISR is intended for dual low-side, dual high-side, or synchronous rectifier applications where channels operate independently.

Is the SI8232DB-D-ISR qualified for automotive applications?

The SI8232DB-D-ISR is an industrial-grade part (suffix "-I"). Its automotive-grade counterpart is SI8232DB-AS, which undergoes full AEC-Q100 qualification, AIAG-compliant PPAP documentation, and IMDS/CAMDS material reporting. While SI8232DB-D-ISR shares identical electrical parameters and construction, it is not certified for automotive use - designers requiring automotive qualification must select the "-AS" variant or verify compliance through Skyworks' automotive product roadmap.