Dual-Channel Isolated Gate Drivers from Diodes Incorporated Enable Flexible, Reliable Half-Bridge and Independent Gate-Drive Topologies for Switching Applications

Automotive-compliant API21550Q/API21552Q versions are also available for automotive applications.

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PLANO, Texas--(BUSINESS WIRE)-- Diodes Incorporated (Diodes) (Nasdaq: DIOD) today announces the release of the API21550/API21552 series within its RobustISO™ family of isolation products. These dual-channel isolated gate drivers are designed for system engineers who require robust, high-voltage isolation and reliable signal transmission for power-switch driving. Applications include motor drives, solar inverters, battery management systems (BMS), servers, IT and industrial infrastructures, and high-voltage DC-DC converters.

The API21550/API21552 series features a silica-based capacitive isolation barrier that can withstand a breakdown voltage of up to 13kV_RMS and provides a predicted isolation barrier lifetime exceeding 40 years*. The devices achieve a minimum common mode transient immunity (CMTI) of 150V/ns, which helps maintain signal integrity in the presence of fast voltage transients typical of high-voltage switching environments. The API21550/API21552 series provides up to 4A source and 6A sink peak current capability, with supply voltage support up to 30V on the output side and 3V to 5.5V on the input side. Both devices deliver short propagation delays (40ns typ.) with minimal pulse-width distortion (7ns max.) and external disable functions. Depending on the package, the devices provide reinforced isolation with a withstand isolation voltage (V_ISO) of up to 5.7kV_RMS and surge isolation voltage up to 12.8kVpk.

The API21550 device has separate high- and low-side driving outputs with adjustable deadtime, providing shoot-through protection and optimizing the device for isolated half-bridge driving applications. The API21552 has dual independent driving outputs, supporting dual low-side, dual high-side, and half-bridge gate driving applications.

The integrated features of the RobustISO API21550/API21552 series include a 5ns de-glitch filter for improved noise immunity, active pulldown for output safety, and undervoltage lockout (UVLO) on both the input and the output power rails. These enable the devices to support a wide range of switch-driving application scenarios, including silicon-based MOSFETs and IGBTs, as well as silicon carbide (SiC) and gallium nitride (GaN) wide-bandgap power devices.

The API21550/API21552 series is supplied in the SO-16W (Type CJ), SO-14W (Type CJ), and SO-16 (Type CJ) packages and is available at $0.99 in 1,000-piece quantities.

The devices are being demonstrated at electronica 2026 as part of Diodes’ HV-to-48V power conversion demonstration, which visitors can explore at Booth 211 in Hall C6.

Automotive-compliant** versions, API21550Q/API21552Q, are available and suitable for automotive applications.

More information about the RobustISO family can be found at: https://www.diodes.com/products/isolation.

About Diodes Incorporated

Diodes Incorporated (Nasdaq: DIOD) delivers high-quality semiconductor products to the world’s leading companies in the automotive, industrial, computing, consumer electronics, and communications markets. We leverage our expanded product portfolio of analog and power solutions combined with a flexible hybrid manufacturing model to meet customers’ needs. Our broad range of application-specific products, delivered through a total solutions sales approach and supported by global operations including engineering, testing, manufacturing, and customer service, enable us to be a premier provider for high-growth markets. For more information, visit www.diodes.com.

*According to Diodes Incorporated's isolation reliability calculations.

**Automotive-compliant - AEC qualified, manufactured in facilities certified to IATF 16949, supporting PPAP documents.

RobustISO™ is a trademark of Diodes Incorporated.

The Diodes logo is a registered trademark of Diodes Incorporated in the United States and other countries.

All other trademarks are the property of their respective owners.

© 2026 Diodes Incorporated. All Rights Reserved.

View source version on businesswire.com: https://www.businesswire.com/news/home/20261105885888/en/

Company Contact:
Gurmeet Dhaliwal
Vice President, Corporate Marketing & Investor Relations
Diodes Incorporated
+1 408-232-9003
Contact Us

Source: Diodes Incorporated (P)

Key Terms

common mode transient immunity technical

The ability of an electronic device or system to withstand brief, sudden voltage or electrical disturbances that appear equally on multiple conductors relative to ground. Think of it like a car’s suspension absorbing a pothole that hits both wheels at once; strong immunity means fewer malfunctions, lower recall and repair costs, and smoother regulatory approval—factors that directly affect a product’s reliability, marketability, and a company’s financial risk.

undervoltage lockout technical

Undervoltage lockout is a safety feature in electronic systems that automatically shuts down or disables equipment when the voltage drops below a certain level. This prevents damage or malfunction caused by insufficient power. For investors, it highlights how a company's technology or infrastructure manages power risks, which can affect reliability and operational stability.

silicon carbide technical

Silicon carbide is a hard, durable material made from silicon and carbon, often used in industrial applications like cutting tools and electronics. Its ability to withstand high temperatures and conduct electricity efficiently makes it valuable in manufacturing advanced electronic devices. For investors, companies working with silicon carbide are seen as key players in the growing market for high-performance electronics and energy-efficient technologies.

gallium nitride technical

Gallium nitride is a durable semiconductor material used to make electronic components that switch faster, handle higher voltages, and waste less energy than older silicon parts. Think of it as a lighter, more efficient motor in an appliance: it lets devices shrink, run cooler and save power, which can lower manufacturing costs, enable new products and boost sales or margins for companies that adopt it—key factors investors watch.