Overview
The NCP51705MNTXG is a high-speed, low-side SiC MOSFET driver designed by onsemi. This driver is primarily intended to drive Silicon Carbide (SiC) MOSFET transistors, aiming to minimize conduction losses and switching losses. It achieves this by delivering high peak current during turn-on and turn-off phases and utilizing an on-board charge pump to generate a user-selectable negative voltage rail. This enhances reliability, dV/dt immunity, and turn-off speed. The driver also features an externally accessible 5 V rail for powering the secondary side of digital or high-speed opto-isolators in isolated applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | WQFN-24 |
| Package Size | 4 x 4 mm |
| Number of Outputs | 1 |
| Topology | Single |
| Isolation Type | Non-Isolated |
| Vin Max (V) | N/A |
| VCC Max (V) | 28 |
| Rise Time (ns) | 8 |
| Fall Time (ns) | 8 |
| Drive Source Current Typ (A) | 6 |
| Drive Sink Current Typ (A) | 6 |
| Turn On Prop. Delay Typ (ns) | 25 |
| Turn Off Prop. Delay Typ (ns) | 25 |
Key Features
- High Peak Output Current with Split Output Stages
- Extended Positive Voltage Rating up to 28 V Max
- User-adjustable Built-in Negative Charge Pump (-3.3 V to -8 V)
- Accessible 5 V Reference / Bias Rail
- Adjustable Under-Voltage Lockout
- Fast Desaturation Function
Applications
- High Performance Inverters
- High Power Motor Drivers
- Totem Pole PFC
- Industrial & Motor Drives
- UPS & Solar Inverters
- High Power DC Chargers
Q & A
- What is the primary purpose of the NCP51705MNTXG driver? The NCP51705MNTXG is designed to drive Silicon Carbide (SiC) MOSFET transistors, minimizing conduction and switching losses.
- What is the maximum positive voltage rating of the NCP51705MNTXG? The maximum positive voltage rating is up to 28 V.
- Does the NCP51705MNTXG have an adjustable charge pump? Yes, it features a user-adjustable built-in negative charge pump that can generate a voltage from -3.3 V to -8 V.
- What is the purpose of the accessible 5 V reference/bias rail? The 5 V rail is used to power the secondary side of digital or high-speed opto-isolators in isolated applications.
- What package type and size does the NCP51705MNTXG come in? The driver comes in a WQFN-24 package with a size of 4 x 4 mm.
- What are the typical rise and fall times of the NCP51705MNTXG? The typical rise and fall times are both 8 ns.
- What are the typical turn-on and turn-off propagation delays? The typical turn-on and turn-off propagation delays are both 25 ns.
- What are some common applications of the NCP51705MNTXG? Common applications include high performance inverters, high power motor drivers, totem pole PFC, industrial & motor drives, UPS & solar inverters, and high power DC chargers.
- Does the NCP51705MNTXG have an under-voltage lockout feature? Yes, it features an adjustable under-voltage lockout.
- What is the fast desaturation function used for? The fast desaturation function is used to enhance turn-off speed and reliability.
