Skyworks Solutions Inc. SI8230BB-D-ISR

Overview

SI8230BB-D-ISR from Skyworks Solutions is a 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 for half-bridge MOSFET/IGBT drive in isolated power converters and motor control systems.

For engineers reviewing the SI8230BB-D-ISR datasheet, SI8230BB-D-ISR pinout, SI8230BB-D-ISR application, or SI8230BB-D-ISR equivalent, this device supports robust gate drive in space-constrained industrial inverters, onboard chargers, and isolated DC-DC supplies where 2.5 kVRMS reinforcement and <45 ns propagation delay are critical.

Technical Context

The SI8230BB-D-ISR implements RF-based silicon isolation with a semiconductor barrier, delivering fast 45 ns typical propagation delay and >400 mV input hysteresis for noise immunity. Its two independent isolated channels support high-side and low-side switching with integrated dead time control via external resistor (R_DT) and automatic overlap recovery.

It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) rails - each with 8 V turn-on threshold - ensuring safe startup/shutdown sequencing. Outputs default low during UVLO, and DISABLE input forces both outputs low unconditionally when asserted.

Key Specifications

Pinout & Package

SOIC-16 wide-body package (10.3 mm × 10.3 mm, 2.65 mm height) with enhanced creepage for 2.5 kVRMS isolation. Pin 1 marked by dot; pins 1–8 on left side, 9–16 on right side.

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 SI8230BD-D-IS, SI8230BB-D-ISR offers lower isolation rating but identical timing, drive strength, and footprint - ideal for cost-sensitive 250–400 VAC systems. Versus UCC21520DWR, it delivers comparable noise immunity with silicon RF isolation but at lower peak current, making it optimal for medium-power industrial converters where 0.5 A suffices.

Availability

SI8230BB-D-ISR is available at Aetrix Electronics and suitable for industrial inverters, onboard chargers, and isolated DC-DC supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for SI8230BB-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 leader in analog and mixed-signal semiconductors, specializing in RF, isolation, timing, and power management ICs for high-reliability applications.

The Si823x family was designed specifically for isolated gate driving in power conversion systems - emphasizing robustness, timing precision, and safety certification across automotive, industrial, and computing markets.

FAQ

What is the maximum recommended switching frequency for SI8230BB-D-ISR?

The SI8230BB-D-ISR supports up to 8 MHz switching frequency, validated by its 45 ns maximum propagation delay and fast 10–90% rise/fall times (<20 ns typical at 12 V with 100 pF load). This makes it suitable for high-frequency resonant converters and digital power controllers where tight timing margins are essential. SI8230BB-D-ISR maintains consistent performance across temperature and supply voltage variations per Figure 7 and Figure 19 in the datasheet.

Does SI8230BB-D-ISR require external components for basic operation?

Yes - SI8230BB-D-ISR requires external 0.1 µF ceramic decoupling capacitors on VDDI, VDDA, and VDDB pins, plus a pull-down resistor on DISABLE if unused. For programmable dead time, a resistor (R_DT) must connect DT to ground; a 0.1 µF capacitor in parallel improves noise immunity. No external level shifters or optocoupler biasing networks are needed due to integrated isolation and TTL compatibility.

How does the UVLO function across the three supply rails of SI8230BB-D-ISR?

SI8230BB-D-ISR implements independent UVLO monitors on VDDI (input), VDDA (high-side), and VDDB (low-side), each with 8 V turn-on and ~7.5 V turn-off thresholds. If any rail falls below UVLO, its associated outputs are forced low - e.g., low VDDA holds VOA low while VOB remains functional if VDDB is valid. This prevents partial drive conditions that could damage power switches. SI8230BB-D-ISR exits UVLO only after all three rails stabilize above threshold.

Can SI8230BB-D-ISR drive SiC or GaN MOSFETs directly?

SI8230BB-D-ISR can drive low-to-medium gate charge SiC MOSFETs (Qg ≤ 25 nC) and GaN HEMTs (Qg ≤ 15 nC) directly at 12–15 V supply, given its 0.5 A peak source/sink capability and fast edge rates. For higher-Qg devices or layouts with significant gate loop inductance, an external buffer stage is recommended. SI8230BB-D-ISR's 45 ns propagation delay and low jitter ensure precise timing alignment critical for wide-bandgap devices.

Is SI8230BB-D-ISR pin-compatible with other Si823x variants?

Yes - SI8230BB-D-ISR shares identical SOIC-16 wide-body pinout and logic behavior with all Si8230x variants (e.g., SI8230BD-D-IS, SI8230AD-D-IS), differing only in isolation rating (2.5 vs. 5.0 vs. 3.75 kVRMS) and UVLO threshold (8 V vs. 5 V). This allows drop-in replacement within the same package footprint when safety or operating voltage requirements change, provided system isolation testing is repeated for the new rating.