Si827x Isolated Gate Drivers

The Silicon Labs Si827x provides options for either a single driver or a combination of two 4 A isolated drivers in a single package for isolated gate drive applications. The Si827x, with its high performance noise immunity, eliminates the risk posed by faster switching speeds. The high noise transients generated by the faster switching will not affect signal integrity through the driver, thereby eliminating the risk of loss of modulation. The ultra-high latch-up spec of 400 kV/µs makes the Si827x extremely robust and will prevent permanent latch-up damage. 

The Si827x has an EN (active high) instead of the usual DIS (active low) pin, UVLO fault protection, a de-glitch feature for filtering noisy inputs and highly precise dead time (DT pin) programmability. With this feature, users can precisely control the “dead time” between the two drivers switching to optimize system efficiency and safety. The drivers operate with a wide range of 2.5 V - 5.5 V input VDD and a maximum drive supply voltage of 30 V.  

The lower VDDI voltage capability of 2.5 V lets users design with a low voltage power supply consuming less power, increasing system efficiency, and providing compatibility with low power MCUs. The isolation is based on the Silicon Labs proprietary capacitive coupled technology, which offers low EMI emissions, long lifetimes, fast and accurate timing specs, and a wide temperature range of -40°C to +125°C. Devices are offered in a choice of compact packages, including NB SOIC (8 and 16 pin) and a compact 5 x 5 mm LGA. 

Now launching compact QFN packages that are drop-in compatible and improved MSL compared to LGA packages. NEW!


  • High noise immunity of 200 kV/µs and latch-up immunity of 400 kV/µs protects from transients
  • Fast and accurate timing specs, with very low jitter of 200 ps
  • EN pin ensures safe default state
  • DT pin for accurate dead-time programming
  • Low voltage operation down to 2.5 V for controller

Si827x Product Matrix

Devices Data Sheet Evaluation Kit Isolation Rating (kV rms) UVLO Voltage (V) Input Type Output Configuration Max Propagation Delay (ns) Overlap Protection and Dead Time Control Package Type AEC-Q100 Peak Output Current (A) 10 kV Surge
Si8273ISO-KIT 2.5 3, 5, 8, 12 Single Input Single Driver, Separate Pull Up/Down 60, 75 No NB SOIC8 Yes 4 No
Si8273ISO-KIT 2.5 3, 5, 8, 12 VIA, VIB High Side / Low Side 60, 75 Yes NB SOIC16, QFN14 Yes 4 No
Si8274ISO-KIT 2.5 3, 5, 8, 12 PWM High Side / Low Side 105, 60 Yes NB SOIC16, QFN14 Yes 4 No
Si8275ISO-KIT 1, 2.5 3, 5, 8, 12 VIA, VIB Dual Driver 60, 75 Yes NB SOIC16, QFN14 Yes 4 No
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