Overview
The FAN3224TMX, part of the FAN3223-25 family, is a dual 4 A 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 various power management and switching applications. The driver is available with either TTL or CMOS input thresholds, offering flexibility in system design.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD Operating Range | 4.5 | 18.0 | V | |
| IDD Supply Current (Inputs/EN Not Connected) | 0.70 | 0.95 | 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 | A | ||
| Sink/Source Current at VOUT = 6 V | 4.3 A (Sink) / 2.8 A (Source) | A | ||
| tRISE Output Rise Time (CLOAD = 2200 pF) | 9 | 17 | ns | |
| tFALL Output Fall Time (CLOAD = 2200 pF) | 9 | 17 | ns | |
| tDEL.MATCH Propagation Matching Between Channels | 2 | 4 | ns |
Key Features
- Industry-standard pinouts for easy integration into existing designs.
- MillerDrive™ architecture for high current during the Miller plateau stage, minimizing switching loss.
- Rail-to-rail voltage swing and reverse current capability.
- Dual independent enable pins that default to ON if not connected.
- Choice of TTL or CMOS input thresholds.
- Under-voltage lockout function to ensure the output is held LOW until the supply voltage is within the operating range.
- Matched internal propagation delays between channels for critical timing applications.
- Ability to connect two drivers in parallel to double the current capability driving a single MOSFET.
Applications
- Low-side switching applications in power supplies, motor control, and DC-DC converters.
- Synchronous rectifiers where matched propagation delays are critical.
- High-frequency switching circuits requiring high peak current pulses.
- Power management systems in automotive, industrial, and consumer electronics.
Q & A
- What is the operating voltage range of the FAN3224TMX?
The FAN3224TMX operates within a voltage range of 4.5 V to 18 V.
- What are the peak sink and source currents of the FAN3224TMX at VDD = 12 V?
The peak sink and source currents are 5 A at VDD = 12 V.
- Does the FAN3224TMX support both TTL and CMOS input thresholds?
- What is the purpose of the MillerDrive™ architecture in the FAN3224TMX?
The MillerDrive™ architecture provides high current during the Miller plateau stage of the MOSFET turn-on/turn-off process, minimizing switching loss.
- Can the FAN3224TMX be used in synchronous rectifier applications?
- How do the enable pins function if they are not connected?
If the enable pins are not connected, internal resistors bias the inputs such that the output is pulled LOW to hold the power MOSFET OFF.
- What is the typical supply current of the FAN3224TMX when inputs and enable are not connected?
The typical supply current is 0.95 mA when inputs and enable are not connected.
- Can two FAN3224TMX drivers be connected in parallel to increase current capacity?
- What is the output rise and fall time of the FAN3224TMX with a 2200 pF load?
The output rise and fall times are typically 17 ns each with a 2200 pF load.
- Does the FAN3224TMX have an under-voltage lockout function?
