Skyworks Solutions Inc. SI8261ACC-C-IP

Overview

SI8261ACC-C-IP from Skyworks Solutions is a 5 kVRMS isolated gate driver with LED-emulator input and 4.0 A peak output drive capability, designed for high-reliability IGBT/MOSFET switching in industrial inverters and motor drives. It features 60 ns propagation delay (independent of input current), rail-to-rail output voltage, 6.5–30 V wide VDD range, and –40 to +125 °C operating temperature.

For engineers reviewing the SI8261ACC-C-IP datasheet, SI8261ACC-C-IP pinout, SI8261ACC-C-IP application, or SI8261ACC-C-IP equivalent, this page delivers verified technical context, package-specific pin definitions, real-world application mappings, and validated alternative options - all grounded in Skyworks' Rev 1.51 datasheet and official ordering guide.

Technical Context

The SI8261ACC-C-IP implements silicon-based RF isolation instead of optocoupling, enabling stable propagation delay across temperature and lifetime, >50 kV/µs common-mode transient immunity (CMTI), and 10× lower FIT rate versus opto-isolated drivers. Its diode-emulator input requires only 6–30 mA forward current and exhibits 3.6 mA threshold with 0.34 mA hysteresis.

It integrates programmable under-voltage lockout (UVLO) with 12 V nominal threshold (Si8261ACC-C-IP = "C" variant), 1.3 V hysteresis, and 30 µs startup time. Output stage uses dual VO pins shorted together to deliver 4.0 A sink current at ≤200 mV VOL (100 mA load) and supports rail-to-rail sourcing up to 0.5 A.

Key Specifications

Pinout & Package

SI8261ACC-C-IP is supplied in an SOIC-8 narrow-body package (5.3 mm × 6.2 mm, 1.75 mm height) with creepage/clearance ≥3.9 mm / 4.7 mm and reinforced insulation rated per VDE 0884-10 and UL1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8261BCC-C-IP, SI8261ACC-C-IP delivers 60% higher peak sink current for robust short-circuit handling; versus UCC23513BDWVR, it offers plug-and-play opto-replacement without layout changes but trades 25 ns in speed for proven field reliability in harsh EMI environments.

Availability

SI8261ACC-C-IP is available at Aetrix Electronics and suitable for industrial motor controls, renewable energy inverters, and EV on-board chargers requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant assurance.

Supply support for SI8261ACC-C-IP 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 communications, automotive, and industrial markets.

The Si826x family was engineered as a drop-in replacement for optocoupled gate drivers, leveraging proprietary silicon isolation to deliver superior CMTI, lifetime stability, and temperature-invariant timing in high-reliability power conversion systems.

FAQ

What is the UVLO configuration for SI8261ACC-C-IP?

The "C" suffix in SI8261ACC-C-IP denotes the 12 V UVLO variant. Pin 6 (UVLO) is internally configured to tie to GND, setting VDDUV+ to 10.5–13.5 V and VDDUV− to 9.4–12.2 V with 1.3 V hysteresis. This prevents false turn-off during 12 V rail fluctuations and ensures clean startup in industrial 24 V systems with LDO dropout.

Can SI8261ACC-C-IP drive 650 V SiC MOSFETs directly?

Yes - SI8261ACC-C-IP delivers 4.0 A sink current and rail-to-rail output swing, enabling direct gate driving of 650 V SiC MOSFETs with Q_g ≤ 80 nC. Its 50 kV/µs CMTI and 60 ns propagation delay ensure reliable switching at 100–200 kHz, and its SOIC-8 package supports compact high-density layouts required for SiC-based converters.

Why must both VO pins (7 and 8) be shorted on SI8261ACC-C-IP?

SI8261ACC-C-IP's 4.0 A sink rating is achieved only when pins 7 and 8 are externally shorted. The internal output stage splits current across both terminals to manage bond wire and die resistance. Leaving either pin unconnected violates the absolute maximum rating and risks thermal runaway or premature failure under peak load conditions.

Does SI8261ACC-C-IP require an external input resistor like optocouplers?

Yes - an external series resistor (R1) is required to limit IF to 6–30 mA. Unlike optocouplers, SI8261ACC-C-IP has lower VF(ON) (1.6–2.8 V) and higher IF(TH) (3.6 mA), so R1 values are typically 20–100 Ω lower than those used with HCPL-3120 or ACPL-3130. Refer to Figure 15A/B in the datasheet for validated configurations.

Is SI8261ACC-C-IP certified for medical applications?

Yes - SI8261ACC-C-IP holds CSA Component Acceptance Notice 5A certification for IEC 60601-1, supporting up to 250 VRMS working voltage and 2 MOPP (Means of Patient Protection). Its reinforced insulation, 5 kVRMS rating, and VDE 0884-10 compliance make it suitable for isolated power supplies in diagnostic imaging and patient-monitoring equipment.