Overview
The UCC21521DW is an isolated dual-channel gate driver produced by Texas Instruments. This device is designed to drive power MOSFETs, IGBTs, and SiC MOSFETs with high efficiency and robustness. It features a 5.7-kVRMS reinforced isolation barrier, ensuring high reliability in various power applications. The UCC21521DW operates over a wide temperature range of –40°C to +125°C and supports multiple configurations such as dual low-side, dual high-side, or half-bridge driver setups. It is particularly suited for applications requiring high power density and best-in-class propagation delay and pulse-width distortion.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Output Current | 4 A (source), 6 A (sink) | A |
| Isolation Voltage | 5.7 kVRMS | V |
| Common-Mode Transient Immunity (CMTI) | 100 V/ns | V/ns |
| Operating Temperature Range | –40 to +125°C | °C |
| Input Supply Voltage (VCCI) | 3 to 18 V | V |
| Driver Output Bias Supply (VDDA, VDDB) | 5 to 25 V | V |
| Package Type | SOIC (16-pin) | |
| Package Size | 10.30 mm × 7.50 mm | mm |
| UVLO Thresholds | 5 V, 8 V, 12 V versions available | V |
Key Features
- Universal configuration: dual low-side, dual high-side, or half-bridge driver with programmable dead time (DT)
- High peak output current: 4 A source and 6 A sink
- Reinforced isolation: 5.7 kVRMS with 100 V/ns CMTI
- Wide input VCCI range: 3 V to 18 V
- Driver output bias supply up to 25 V
- Under voltage lock-out (UVLO) protection on all supply voltage pins
- Enable pin for shutdown and normal operation control
- Functional isolation between the two secondary-side drivers
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 output current of the UCC21521DW?
The UCC21521DW has a peak output current of 4 A (source) and 6 A (sink). - What is the isolation voltage of the UCC21521DW?
The isolation voltage is 5.7 kVRMS. - What is the common-mode transient immunity (CMTI) of the UCC21521DW?
The CMTI is 100 V/ns. - What is the operating temperature range of the UCC21521DW?
The operating temperature range is –40°C to +125°C. - What are the input and output supply voltage ranges for the UCC21521DW?
The input supply voltage (VCCI) ranges from 3 V to 18 V, and the driver output bias supply (VDDA, VDDB) ranges from 5 V to 25 V. - What types of configurations are supported by the UCC21521DW?
The UCC21521DW supports dual low-side, dual high-side, or half-bridge driver configurations with programmable dead time (DT). - What is the package type and size of the UCC21521DW?
The package type is SOIC (16-pin), and the package size is 10.30 mm × 7.50 mm. - Does the UCC21521DW have under voltage lock-out (UVLO) protection?
Yes, the UCC21521DW has UVLO protection on all supply voltage pins. - What are some typical applications of the UCC21521DW?
Typical applications include isolated converters in offline AC-to-DC power supplies, server and telecom infrastructure, motor drives, solar inverters, LED lighting, inductive heating, and uninterruptible power supplies (UPS). - How does the enable pin function on the UCC21521DW?
The enable pin (EN) allows for shutdown of both outputs when pulled low and normal operation when left open or pulled high.
