Overview
The FAN3225TMPX is a dual 4 A high-speed, low-side gate driver from onsemi, designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications. This device is part of the FAN3223-25 family and is available with TTL input thresholds. It features internal circuitry that includes an under-voltage lockout function, ensuring the output remains LOW until the supply voltage is within the operating range. The FAN3225TMPX incorporates MillerDrive™ architecture, which combines bipolar and MOSFET technologies to minimize switching losses and provide high current during the Miller plateau stage of the MOSFET turn-on and turn-off process.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Range (VDD) | 4.5 | 18.0 | V | |
| Peak Sink/Source Current at VDD = 12 V | 5 A | A | ||
| Sink Current at VOUT = 6 V | 4.3 A | A | ||
| Source Current at VOUT = 6 V | 2.8 A | A | ||
| Input Logic LOW Threshold (TTL) | 0.8 | 1.2 | V | |
| Input Logic HIGH Threshold (TTL) | 1.6 | 2.0 | V | |
| Output Propagation Delay (CMOS Inputs) | 9 | 17 | 29 | ns |
| Output Rise Time (CLOAD = 2200 pF) | 12 | 20 | ns | |
| Output Fall Time (CLOAD = 2200 pF) | 9 | 17 | ns | |
| Propagation Matching Between Channels | 2 | 4 | ns | |
| Ambient Temperature Range | -40°C | 125°C | °C |
Key Features
- Industry-standard pinouts
- 4.5 V to 18 V operating range
- 5 A peak sink/source current at VDD = 12 V
- Choice of TTL or CMOS input thresholds
- MillerDrive™ architecture for high current during MOSFET turn-on and turn-off
- Under-voltage lockout function
- Matched internal propagation delays between A and B channels
- Ability to connect two drivers in parallel to double current capability
- Dual independent enable pins with TTL thresholds
- Dual inputs of opposite polarity in the FAN3225 version for flexible configuration
- Automotive-qualified versions available (e.g., F085)
- Available in 8-lead 3x3 mm MLP or 8-lead SOIC packages
Applications
- Switch-mode power supplies
- High-efficiency MOSFET switching
- Synchronous rectifier circuits
- DC-to-DC converters
- Motor control
- Automotive-qualified systems (F085 version)
Q & A
- What is the operating voltage range of the FAN3225TMPX?
The operating voltage range is from 4.5 V to 18 V.
- What is the peak current capability of the FAN3225TMPX at VDD = 12 V?
The peak sink/source current is 5 A at VDD = 12 V.
- What type of input thresholds does the FAN3225TMPX support?
The FAN3225TMPX supports TTL input thresholds.
- What is the MillerDrive™ architecture used for in the FAN3225TMPX?
The MillerDrive™ architecture is used to provide high current during the MOSFET turn-on and turn-off process, minimizing switching losses.
- Can the FAN3225TMPX be used in automotive applications?
Yes, automotive-qualified versions (e.g., F085) are available.
- How can the current capability of the FAN3225TMPX be increased?
The current capability can be doubled by connecting two drivers in parallel.
- What is the propagation delay matching between channels in the FAN3225TMPX?
The propagation delay matching between channels is typically 2 to 4 ns.
- What is the output rise and fall time of the FAN3225TMPX with a 2200 pF load?
The output rise time is typically 12 to 20 ns, and the output fall time is typically 9 to 17 ns.
- What are the package options for the FAN3225TMPX?
The FAN3225TMPX is available in 8-lead 3x3 mm MLP or 8-lead SOIC packages.
- What is the ambient temperature range for the FAN3225TMPX?
The ambient temperature range is from -40°C to 125°C.
