Overview
The FAN3224TMPX, part of the FAN3223-25 family, is a dual 4A high-speed, low-side gate driver designed by onsemi. This component is specifically engineered to drive N-channel enhancement-mode MOSFETs in low-side switching applications. It provides high peak current pulses during short switching intervals, making it suitable for applications requiring efficient and reliable MOSFET control. The driver is available with either TTL or CMOS input thresholds and features internal circuitry that includes an under-voltage lockout function to ensure the output remains LOW until the supply voltage is within the operating range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Operating Range | 4.5 | 18.0 | V | |
| IDD Supply Current (Inputs/EN Not Connected) | 0.70 | 1.20 | mA | |
| VINL_T INx Logic LOW Threshold | 0.8 | 1.2 | V | |
| VINH_T INx Logic HIGH Threshold | 1.6 | 2.0 | V | |
| Peak Sink/Source Current at VDD = 12 V | 5 | A | ||
| Sink/Source Current at VOUT = 6 V | 4.3 / 2.8 | A | ||
| Output Rise Time (CLOAD = 2200 pF) | 9 | 17 | ns | |
| Output Fall Time (CLOAD = 2200 pF) | 9 | 17 | ns | |
| Propagation Delay (CMOS Inputs) | 9 | 18 | 34 | ns |
| Ambient Operating Temperature | -40 | 125 | °C |
Key Features
- Industry-standard pinouts
- MillerDrive™ architecture for high current during the Miller plateau stage of MOSFET turn-on/turn-off
- Choice of TTL or CMOS input thresholds
- Dual independent enable pins that default to ON if not connected
- Internal resistors to turn driver off if no inputs are connected
- Under-voltage lockout function
- Matched internal propagation delays between A and B channels
- Double current capability by paralleling channels
- Available in 8-lead 3x3 mm MLP or 8-lead SOIC package
- Rated from –40°C to +125°C ambient temperature
Applications
- AC-DC merchant power supplies for servers and workstations
- Synchronous rectifiers and other applications requiring dual gate drives with critical timing
- Low-side switching applications in various power management systems
Q & A
- What is the operating voltage range of the FAN3224TMPX?
The FAN3224TMPX operates within a voltage range of 4.5 V to 18 V. - What are the peak sink/source currents at VDD = 12 V?
The peak sink/source currents are 5 A at VDD = 12 V. - What are the input logic thresholds for TTL inputs?
The TTL input logic thresholds are 0.8 V to 1.2 V for LOW and 1.6 V to 2.0 V for HIGH. - Does the FAN3224TMPX have an under-voltage lockout function?
Yes, the FAN3224TMPX features an under-voltage lockout function that holds the output LOW until the supply voltage is within the operating range. - How can the current capability be increased?
The current capability can be doubled by connecting two drivers in parallel. - What is the typical propagation delay for CMOS inputs?
The typical propagation delay for CMOS inputs is 9 to 18 ns. - What is the MillerDrive™ architecture used for?
The MillerDrive™ architecture is used to provide high current during the Miller plateau stage of the MOSFET turn-on/turn-off process, minimizing switching loss. - What are the package options for the FAN3224TMPX?
The FAN3224TMPX is available in 8-lead 3x3 mm MLP or 8-lead SOIC packages. - What is the ambient operating temperature range?
The ambient operating temperature range is from –40°C to +125°C. - Can the FAN3224TMPX be used in synchronous rectifier applications?
Yes, the FAN3224TMPX is suitable for synchronous rectifier applications due to its matched internal propagation delays between A and B channels.
