Overview
The UCC21521DWR from Texas Instruments is an isolated dual-channel gate driver designed to drive power MOSFETs, IGBTs, and SiC MOSFETs with high efficiency and robustness. This device features a 5.7-kVrms reinforced isolation barrier, ensuring high voltage isolation and common-mode transient immunity (CMTI) greater than 100 V/ns. It operates within a wide temperature range of –40°C to +125°C and supports various configurations such as dual low-side, dual high-side, or half-bridge drivers. The UCC21521DWR is optimized for high power density applications, including offline AC-to-DC power supplies, server and telecom infrastructure, motor drives, and solar inverters.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Source Current | 4 A | |
| Peak Sink Current | 6 A | |
| Propagation Delay | 19 ns (typical) | |
| Minimum Pulse Width | 10 ns | |
| Maximum Delay Matching | 5 ns | |
| Maximum Pulse-Width Distortion | 6 ns | |
| Common-Mode Transient Immunity (CMTI) | >100 V/ns | |
| Surge Immunity | Up to 12.8 kV | |
| Isolation Barrier Life | >40 years | |
| Input VCCI Range | 3 V to 18 V | |
| Output VDD Supply Range | Up to 25 V | |
| UVLO Options | 5 V, 8 V, 12 V | |
| Operating Temperature Range | –40°C to +125°C | |
| Package Type | Wide body SOIC-16 (DW) |
Key Features
- Universal configuration: dual low-side, dual high-side, or half-bridge driver
- Programmable overlap and dead time
- Fast enable for power sequencing
- TTL and CMOS compatible inputs
- Rejects input pulses and noise transients shorter than 5 ns
- Fail-safe measure: primary-side logic failures force both outputs low
- Safety-related certifications: 8000-V PPK reinforced isolation, CSA, CQC, and UL 1577 compliance
- Internal functional isolation between the two secondary-side drivers up to 1500 V DC
Applications
- Isolated converters in offline AC-to-DC power supplies
- Server, telecom, IT, and industrial infrastructures
- Motor drive and DC-to-AC solar inverters
- LED lighting
- Inductive heating
- Uninterruptible power supply (UPS)
Q & A
- What is the peak current rating of the UCC21521DWR?
The UCC21521DWR has a peak source current of 4 A and a peak sink current of 6 A. - What is the typical propagation delay of the UCC21521DWR?
The typical propagation delay is 19 ns. - What is the common-mode transient immunity (CMTI) of the UCC21521DWR?
The CMTI is greater than 100 V/ns. - What are the UVLO options for the UCC21521DWR?
The UVLO options are 5 V, 8 V, and 12 V. - What is the operating temperature range of the UCC21521DWR?
The operating temperature range is –40°C to +125°C. - What types of configurations can the UCC21521DWR be used in?
The UCC21521DWR can be configured as dual low-side, dual high-side, or a half-bridge driver. - Does the UCC21521DWR have safety-related certifications?
Yes, it has certifications such as 8000-V PPK reinforced isolation, CSA, CQC, and UL 1577 compliance. - What is the maximum output drive supply voltage for the UCC21521DWR?
The maximum output drive supply voltage is up to 25 V. - What is the input VCCI range for the UCC21521DWR?
The input VCCI range is from 3 V to 18 V. - What is the package type of the UCC21521DWR?
The package type is a wide body SOIC-16 (DW).
