Overview
The NCP81075MTTXG, produced by onsemi, is a high-performance dual MOSFET gate driver designed to drive the gates of both high and low side power MOSFETs in a synchronous buck converter topology. This component is optimized for high-frequency switching applications and features an on-chip bootstrap diode, eliminating the need for an external discrete diode. The driver supports high-side bootstrap supply voltages up to 180 V and ensures precise control over the MOSFETs with independent under-voltage lockout (UVLO) protection for both high and low side drivers.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VDD Supply Voltage Range | 8.5 | 12 | 20 | V |
| VHB Voltage on HB | -0.3 | - | 200 | V |
| Switching Frequency | - | - | 1 MHz | - |
| Propagation Delay Times | - | 20 ns | - | - |
| Output Currents | - | 4 A (Sink), 4 A (Source) | - | - |
| Rise/Fall Times with 1000 pF Load | - | 8 ns / 7 ns | - | - |
| Operating Junction Temperature Range | -40 | - | 140 | °C |
| Package | - | - | WDFN10 (MT) | - |
Key Features
- Drives two N-channel MOSFETs in high-side and low-side configuration.
- Floating top driver accommodates boost voltage up to 180 V.
- Independent under-voltage lockout (UVLO) protection for high and low side drivers.
- Switching frequency up to 1 MHz.
- Propagation delay times of 20 ns.
- Output currents of 4 A (sink and source).
- Rise and fall times of 8 ns and 7 ns respectively with a 1000 pF load.
- Specified from -40°C to 140°C.
- Pb-free, halogen-free/BFR-free, and RoHS compliant.
Applications
- Telecom and Datacom.
- Isolated and non-isolated power supply architectures.
- Class D audio amplifiers.
- Two-switch and active clamp forward converters.
Q & A
- What is the primary function of the NCP81075MTTXG?
The NCP81075MTTXG is a high-performance dual MOSFET gate driver designed to drive the gates of both high and low side power MOSFETs in a synchronous buck converter topology. - What is the maximum bootstrap supply voltage supported by the NCP81075MTTXG?
The NCP81075MTTXG supports high-side bootstrap supply voltages up to 180 V. - What is the switching frequency capability of the NCP81075MTTXG?
The NCP81075MTTXG can operate at switching frequencies up to 1 MHz. - What are the propagation delay times of the NCP81075MTTXG?
The propagation delay times are typically 20 ns. - What are the output current capabilities of the NCP81075MTTXG?
The output currents are 4 A for both sink and source. - What are the rise and fall times of the NCP81075MTTXG with a 1000 pF load?
The rise time is 8 ns and the fall time is 7 ns with a 1000 pF load. - What is the operating temperature range of the NCP81075MTTXG?
The operating junction temperature range is from -40°C to 140°C. - Is the NCP81075MTTXG RoHS compliant?
Yes, the NCP81075MTTXG is Pb-free, halogen-free/BFR-free, and RoHS compliant. - What are some common applications of the NCP81075MTTXG?
Common applications include telecom and datacom, isolated and non-isolated power supply architectures, Class D audio amplifiers, and two-switch and active clamp forward converters. - How does the UVLO protection work in the NCP81075MTTXG?
The UVLO protection disables the drivers when the supply voltage crosses a specified threshold. The high-side driver has UVLO based on the voltage across HB and HS pins, and the low-side driver has UVLO based on the VDD voltage.
