Silicon Labs introduced what it claims is the industry’s first digital CMOS-based drop-in replacement solution for optocoupler-isolated gate drivers (opto-drivers).
Supporting up to 5 kV isolation ratings and up to 10 kV surge protection, the Si826x isolated gate drivers provide the ideal configuration, package and footprint fit for a wide range of opto-drivers used in high-power motor control, industrial drives, solar power and EV/HEV inverters, and switched mode and uninterruptible power supplies.
Based on Silicon Labs’ digital isolation technology, the Si826x family is a pin- and footprint-compatible functional upgrade solution for commonly used opto-driver products. Si826x isolated gate drivers emulate the behavior of opto-drivers by modulating a high-frequency carrier instead of light from an LED. This simpler digital architecture provides a robust isolated data path that requires no special considerations or initialization at start-up. While the input circuit mimics the characteristics of an LED, the Si826x devices require less drive current, resulting in higher efficiency. The propagation delay time of Si826x devices is independent of the input drive current, resulting in consistently short propagation times (25 ns), smaller unit-to-unit variation and greater input circuit design flexibility.
The propagation delay and skew of Si826x isolated gate drivers is ten times lower than opto-drivers, which improves response time for feedback loops and enhances system efficiency, according to Silicon Labs. The Si826x devices also provide high noise immunity, enabling robust, glitch-free long-term performance in harsh, noisy environments such as industrial motor control.
Pricing and Availability
Samples and production quantities of the Si826x isolated gate drivers are available now in four package options: SOIC-8 (3.75 kV isolation rating), GW DIP-8 (3.75 kV isolation rating), SO-6 (5 kV isolation rating) and LGA-8 (5 kV isolation rating).
Si826x family pricing in 10,000-unit quantities begins at $0.71 (USD).
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