Isolated gate drivers serve power-switching needs
Diodes’ API21550 and API21552 dual-channel isolated gate drivers provide high-voltage isolation for power-switching applications such as motor drives and solar inverters. They use a silica-based capacitive isolation barrier rated for breakdown voltages up to 13 kV. According to the company’s isolation reliability calculations, the barrier has a predicted lifetime exceeding 40 years.
The API21550 has separate high- and low-side outputs with adjustable deadtime for shoot-through protection in isolated half-bridge applications. The API21552 has dual independent outputs for dual low-side, dual high-side, or half-bridge configurations. Both achieve a minimum CMTI of 150 V/ns to help maintain signal integrity in the presence of fast voltage transients.
Peak source and sink currents reach 4 A and 6 A, respectively, with output-side supply voltage up to 30 V and input-side voltage of 3 V to 5.5 V. Both devices feature 40-ns typical propagation delays, 7-ns maximum pulse-width distortion, and external disable functions. Depending on package type, reinforced isolation provides up to 5.7 kV withstand voltage and 12.8 kV surge voltage.
The API21550 and API21552 are available in small-outline (SO) packages for $0.99 each in 1,000-piece quantities.
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