Overview
The SM72295MAX/NOPB is a 3-A, 100-V full bridge gate driver designed by Texas Instruments. This component is specifically tailored for driving four discrete N-type MOSFETs in a full bridge configuration, making it highly suitable for applications in renewable energy systems. It features integrated high-speed bootstrap diodes and current sense amplifiers, which enhance its efficiency and reliability in high-power switching applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (DW) - 28 pins |
| Operating Temperature Range | -40°C to 125°C |
| Peak Current | 3A |
| Bootstrap Supply Voltage Range | Up to 115V DC |
| VCC Range | +8V to +14V |
| VDD Range | +3V to 7V |
| Junction Temperature | -40°C to +125°C |
| Thermal Resistance (θJA) | 60 °C/W (2-layer board) |
Key Features
- Renewable Energy Grade
- Dual Half Bridge MOSFET Drivers
- Integrated 100V Bootstrap Diodes
- Independent High and Low Driver Logic Inputs
- Bootstrap Supply Voltage Range up to 115V DC
- Two Current Sense Amplifiers with Externally Programmable Gain and Buffered Outputs
- Programmable Over Voltage Protection
- Supply Rail Under-Voltage Lockouts with Power Good Indicator
Applications
The SM72295MAX/NOPB is primarily used in renewable energy systems, such as solar inverters and wind power converters, due to its robust design and high reliability. It is also suitable for other high-power switching applications, including motor drives, power supplies, and industrial automation systems.
Q & A
- What is the peak current rating of the SM72295MAX/NOPB?
The peak current rating is 3A. - What is the operating temperature range of the SM72295MAX/NOPB?
The operating temperature range is -40°C to 125°C. - What type of package does the SM72295MAX/NOPB come in?
The component comes in a SOIC (DW) package with 28 pins. - Does the SM72295MAX/NOPB have integrated bootstrap diodes?
Yes, it has integrated high-speed bootstrap diodes. - What is the purpose of the current sense amplifiers in the SM72295MAX/NOPB?
The current sense amplifiers provide externally programmable gain and buffered outputs to measure and control the current in the MOSFETs. - Is the SM72295MAX/NOPB protected against over-voltage conditions?
Yes, it includes programmable over-voltage protection. - What is the significance of the Power Good (PGOOD) indicator in the SM72295MAX/NOPB?
The PGOOD indicator signals that the supply rail voltage is within the valid operating range, preventing the drivers from operating if VCC is too low. - How should the bootstrap capacitor be connected in the SM72295MAX/NOPB?
The bootstrap capacitor should be connected between the HBA and HSA pins, and it should be placed as close to the IC as possible. - What are the recommended layout considerations for using the SM72295MAX/NOPB?
Low ESR/ESL capacitors should be connected close to the IC, and a low ESR electrolytic capacitor should be connected between the MOSFET drain and ground to prevent large voltage transients. - Is the SM72295MAX/NOPB suitable for high-frequency switching applications?
Yes, it is designed for high-frequency switching with propagation delays as low as 22 ns and rise/fall times of 8 ns.
