2.5kV 4A Dual Channel Isolated

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The Si8239x combines two isolated drivers with either an independent input control or a single input into a single package for high power applications. All drivers operate with a 2.5 V input VDD and a maximum drive supply voltage of 24 V.

The Si8239x isolators are ideal for driving power MOSFETs and IGBTs used in a wide variety of switched power and motor control applications. These drivers utilize Silicon Laboratories' proprietary silicon isolation technology, supporting up to 5 kVRMS withstand voltage. This technology enables high CMTI (100 kV/µs), lower prop delays and skew, reduced variation with temperature and age and tighter part-to-part matching.

It also offers some unique features such as an output UVLO fault detection and feedback, and automatic shutdown for both drivers, an EN (active high) pin, a safe delayed start-up time of 1 ms, fail-safe drivers with default low in case of VDDI power-down, and dead time programmability. The Si8239x family offers longer service life and dramatically higher reliability compared to opto-coupled gate drivers.

Symmetry Electronics is an authorized Silicon Labs distributor.


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Two isolated drivers in one package
Up to 5 kVRMS isolation
Up to 1500 VDC peak driver-to-driver differential voltage
Enhanced output UVLO safety
Status feedback to controller
Both outputs drive low on UVLO
EN pin for enhanced safety
Extended VDDI: 2.5 V 5.5 V
PWM and dual driver versions
4.0 A peak output
High electromagnetic immunity
Extended start-up time (1ms) for safe initialization sequence
30 ns propagation delay
Transient immunity: 100 kV/s
Programmable dead time
10200 ns
40600 ns
Deglitch option for filtering noise
Wide operating range
40 to +125 C
RoHS-compliant packages
SOIC-16 wide body
SOIC-16 narrow body
AEC-Q100 qualified

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