Overview
The UCC27321DGNR from Texas Instruments is a high-speed, low-side gate driver designed to enhance the performance of power MOSFETs and IGBTs in various applications. This device is part of the UCC2732x/UCC3732x family, known for delivering 9 A of peak drive current in an industry-standard pinout. It is engineered to drive the largest of MOSFETs, particularly in systems requiring extreme Miller current due to high dV/dt transitions. This capability eliminates the need for additional external circuits, reducing space, design complexity, and assembly costs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Output Current | ±9 A | A |
| Supply Voltage Range | 4 V to 15 V | V |
| Rise and Fall Times | 20 ns typical | ns |
| Propagation Delay Times | 25 ns (falling), 35 ns (rising) | ns |
| Operating Temperature Range | –40°C to +105°C | °C |
| Package Type | MSOP PowerPAD, SOIC, PDIP | |
| Pins | 8 | |
| Thermal Resistance (θjc) | 4.7°C/W | °C/W |
Key Features
- High-peak current drive capability of ±9 A at the Miller plateau region using TrueDrive technology.
- Efficient constant current sourcing using a unique bipolar and CMOS output stage.
- TTL/CMOS compatible inputs independent of supply voltage.
- Fast rise and fall times of 20 ns typical with a 10-nF load.
- Low propagation delay times of 25 ns (falling) and 35 ns (rising).
- Internal pull-down resistor to ensure the gate remains low until the driver is enabled.
- High noise immunity for reliable operation in noisy environments.
- Thermal shutdown protection to prevent damage under thermal stress.
- Industry-standard pin-out with an additional enable function.
Applications
- DC-DC Converters
- Motor Drives
- Switching Power Supplies
- Power Factor Correction (PFC) Controllers
- Class D Audio Amplifiers
- Inverters for Renewable Energy Systems
- Battery Management Systems
- LED Drivers
Q & A
- What is the operating voltage range for the UCC27321DGNR?
The UCC27321DGNR operates within a voltage range of 4 V to 15 V.
- What is the maximum output current of the UCC27321DGNR?
The device can provide a peak output current of ±9 A.
- Can the UCC27321DGNR be used for switching high-side MOSFETs?
No, this model is specifically designed for low-side driving applications.
- How does the thermal shutdown feature work?
If the internal temperature exceeds a predetermined limit, the device automatically shuts down to prevent damage.
- Are there any specific layout recommendations for PCB design?
Yes, it is essential to minimize trace lengths between the driver and the MOSFET to reduce inductance for optimal performance.
- What is the significance of the TrueDrive technology in the UCC27321DGNR?
TrueDrive technology allows for efficient current delivery at low supply voltages by paralleling bipolar and MOSFET transistors, ensuring high gate drive current where it is most needed.
- What are the benefits of the industry-standard pin-out with an enable function?
The industry-standard pin-out with an enable function provides better control of the operation of the driver applications and simplifies design by maintaining compatibility with existing layouts.
- How does the UCC27321DGNR handle noise immunity?
The device features high noise immunity to ensure reliable operation in noisy environments.
- What is the thermal resistance of the MSOP PowerPAD package?
The thermal resistance (θjc) of the MSOP PowerPAD package is 4.7°C/W.
- Is the UCC27321DGNR RoHS compliant?
Yes, the UCC27321DGNR is RoHS compliant and has a Pb-Free finish.
