UCC21520DWR Alternatives, Datasheet & Cross Reference | Texas Instruments

Find pin-compatible and functional alternatives for the Texas Instruments UCC21520DWR, a 5.7kVrms reinforced isolated dual-channel gate driver. This guide compares key electrical parameters to help you select a suitable replacement.

AI replacement insight

Electrical riskmedium

Slower propagation delay and different UVLO thresholds require circuit timing and startup analysis.

Package risklow

Pin-compatible SOIC-16 packages are available, minimizing layout changes.

Sourcing risklow

Alternatives exist from both the original manufacturer (TI) and other vendors (NOVOSENSE), improving supply chain resilience.

Can it be replaced directly?

Direct replacement for UCC21520DWR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

UCC21540ADWR or NSi6602B-DSWR

Main risk

The primary risk is timing mismatch due to the substitutes having slower propagation delays than the original UCC21520DWR.

Recommended alternatives

Pin-compatible dual-channel isolated driver with same isolation and current, but slower propagation delay.

View details

Alternative comparison matrix

Feature / factor	UCC21520DWR	UCC21540ADWR	NSi6602B-DSWR	UCC21222DR	Compatibility / risk
Package	SOIC-16 (DW)	SOIC-16	SOIC-16 (300mil)	SOIC-16	SOIC-16 / SOIC-16 (300mil) — Pinout is identical.; NSi6602B-DSWR: Pinout is identical.; UCC21222DR: Package matches.
Voltage	5700 VRMS	5700 VRMS	5.7 kVrms	3000 VRMS	5700 VRMS / 5.7 kVrms / 3000 VRMS — Reinforced isolation matches.; NSi6602B-DSWR: Reinforced isolation matches.; UCC21222DR: Basic isolation is much lower than target's reinforced isolation.
Current	4A / 6A	4A / 6A	4 A / 6 A	4A / 6A	4A / 6A / 4 A / 6 A — Peak source/sink current matches.; NSi6602B-DSWR: Peak source/sink current matches.; UCC21222DR: Peak source/sink current matches.
Propagation Delay	19 ns	40 ns	25 ns	28ns	40 ns / 25 ns / 28ns — Significantly slower, may affect high-frequency operation.; NSi6602B-DSWR: Slower, requires timing verification.; UCC21222DR: Slower, requires timing verification.
Uvlo	Multiple options	5.0 V	8 V	-	5.0 V / 8 V — Fixed 5V UVLO vs target's multiple options.; NSi6602B-DSWR: Fixed 8V UVLO vs target's multiple options.

Application & sourcing insights

Questions & answers

Verified drop-in options for UCC21520DWR are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.

When replacing UCC21520DWR, check three main risks: 1) Timing: Ensure the substitute's propagation delay (e.g., 25ns or 40ns) is acceptable for your switching frequency, as the target is faster (19ns). 2) Voltage Levels: Verify the substitute's UVLO threshold is compatible with your design. 3) Isolation: If considering a part like UCC21222DR, confirm its lower 3kVrms basic isolation meets your system's safety and regulatory requirements, as the original has 5.7kVrms reinforced isolation.