Overview
The UCC21220DR, produced by Texas Instruments, is a dual-channel gate driver designed for driving power MOSFETs and GaNFETs in various high-power applications. This device offers both basic and functional isolation, making it suitable for use in power factor correction (PFC), isolated DC/DC converters, and synchronous rectification. It features fast switching performance and robust ground bounce protection with a common-mode transient immunity (CMTI) greater than 125V/ns. The UCC21220DR can be configured as two low-side drivers, two high-side drivers, or half-bridge drivers, and its outputs can be paralleled to increase drive strength for heavy load conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Output Source Current | -4 A | A |
| Peak Output Sink Current | 6 A | A |
| Input Bias Pin Supply Voltage | -0.3 to 6 V | V |
| Driver Bias Supply Voltage (VDDA/B) | Up to 25 V | V |
| UVLO Rising Threshold (5-V Version) | 5.7 to 6.3 V | V |
| UVLO Falling Threshold (5-V Version) | 5.4 to 6.0 V | V |
| Output Rise Time | 8 ns | ns |
| Output Fall Time | 8 ns | ns |
| Junction-to-Ambient Thermal Resistance (RθJA) | 80.2 °C/W | °C/W |
| Power Dissipation (PD) | 950 mW | mW |
Key Features
- Universal configuration: dual low-side, dual high-side, or half-bridge drivers.
- Supports basic and functional isolation.
- High common-mode transient immunity (CMTI) greater than 125V/ns.
- Fast switching performance.
- Robust ground bounce protection.
- Outputs can be paralleled to double the drive strength for heavy load conditions.
- Protection features include DIS pin shutdown, undervoltage lockout (UVLO), and active pulldown protection.
- Low output resistance at high and low states.
- High efficiency and high power density.
Applications
- Power factor correction (PFC).
- Isolated DC/DC converters.
- Synchronous rectification.
- High-power density applications requiring fast switching and robust protection.
Q & A
- What is the peak output source current of the UCC21220DR?
The peak output source current is -4 A.
- What is the peak output sink current of the UCC21220DR?
The peak output sink current is 6 A.
- What are the possible configurations of the UCC21220DR?
The device can be configured as two low-side drivers, two high-side drivers, or half-bridge drivers.
- What is the common-mode transient immunity (CMTI) of the UCC21220DR?
The CMTI is greater than 125V/ns.
- How can the drive strength be increased for heavy load conditions?
The outputs can be paralleled to double the drive strength.
- What protection features does the UCC21220DR include?
The device includes DIS pin shutdown, undervoltage lockout (UVLO), and active pulldown protection.
- What is the junction-to-ambient thermal resistance (RθJA) of the UCC21220DR?
The RθJA is 80.2 °C/W.
- What are the typical applications of the UCC21220DR?
Typical applications include power factor correction (PFC), isolated DC/DC converters, and synchronous rectification.
- What is the power dissipation (PD) of the UCC21220DR under specified conditions?
The power dissipation is 950 mW under the specified conditions.
- How does the UCC21220DR ensure high efficiency and high power density?
The device ensures high efficiency and high power density through its fast switching performance and robust protection features.
