Dual-Channel Isolated Gate Drivers from Diodes Incorporated Enable Flexible

Diodes Incorporated has announced the API21550/API21552 series, part of its RobustISO™ family of isolation products. These dual-channel isolated gate drivers are engineered for system engineers who require robust, high-voltage isolation and reliable signal transmission in power-switch driving applications.

The series incorporates a silica-based capacitive isolation barrier designed to withstand a breakdown voltage of up to 13kV RMS. Based on Diodes Incorporated's reliability calculations, this barrier offers a predicted isolation barrier lifetime exceeding 40 years. Furthermore, a minimum common-mode transient immunity (CMTI) of 150V/ns ensures signal integrity even in the presence of rapid voltage transients common in high-voltage switching environments.

The API21550 and API21552 devices deliver up to 4A source and 6A sink peak current capabilities. They support output-side supply voltages up to 30V and input-side supply voltages ranging from 3V to 5.5V. Both devices feature typical propagation delays of 40ns, a maximum pulse-width distortion of 7ns, and include external disable functions. Depending on the package, reinforced isolation is provided with a withstand isolation voltage of up to 5.7kV RMS and surge isolation voltage of up to 12.8kV peak.

These drivers offer distinct gate-driving configurations: the API21550 provides separate high-side and low-side driving outputs with adjustable deadtime for shoot-through protection, supporting isolated half-bridge driving. The API21552 features dual independent driving outputs, enabling dual low-side, dual high-side, and half-bridge gate-driving configurations. The series also integrates protection and noise-immunity features such as a 5ns de-glitch filter, active pulldown, and undervoltage lockout (UVLO) on both input and output power rails. The devices support switch-driving applications for silicon-based MOSFETs and IGBTs, as well as silicon carbide (SiC) and gallium nitride (GaN) wide-bandgap power devices, with automotive-compliant versions (API21550Q and API21552Q) also available.

Source Link: Press Release

Specifications

Key Features

• Dual-channel isolated gate-driver architecture within Diodes Incorporated's RobustISO™ family.
• Silica-based capacitive isolation barrier with breakdown voltage capability of up to 13kV RMS.
• Predicted isolation barrier lifetime exceeding 40 years, based on Diodes Incorporated's isolation reliability calculations.
• Minimum common-mode transient immunity (CMTI) of 150V/ns.
• Peak output current capability of up to 4A source and 6A sink.
• Output-side supply voltage support up to 30V and input-side supply voltage support from 3V to 5.5V.
• Typical propagation delay of 40ns and maximum pulse-width distortion of 7ns.
• External disable functions provided on both devices.
• API21550 features separate high-side and low-side driving outputs with adjustable deadtime and shoot-through protection.
• API21552 provides dual independent driving outputs supporting dual low-side, dual high-side, and half-bridge configurations.
• Integrated 5ns de-glitch filter, active pulldown for output safety, and UVLO on both input and output power rails.
• Available in SO-16W (Type CJ), SO-14W (Type CJ), and SO-16 (Type CJ) packages, with automotive-compliant API21550Q and API21552Q versions also available.

Applications

• Motor drives.
• Solar inverters.
• Battery management systems (BMS).
• Servers.
• IT infrastructure.
• Industrial infrastructure.
• High-voltage DC-DC converters.
• Power-switch driving applications involving silicon MOSFETs, IGBTs, silicon carbide (SiC), and gallium nitride (GaN) power devices.

Availability

Diodes Incorporated’s API21550 and API21552 dual-channel isolated gate drivers are supplied in three package options: SO-16W (Type CJ), SO-14W (Type CJ), and SO-16 (Type CJ). The devices are available at a published price of US$0.99 per unit in 1,000-piece quantities. In addition to the standard versions, automotive-compliant variants, API21550Q and API21552Q, are also available and are suitable for automotive applications.