Overview
The FAN3224TMX-F085 is a high-speed, low-side gate driver from onsemi, part of the FAN3223-25 family. This dual-channel driver is designed 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 and features internal circuitry for under-voltage lockout, ensuring the output remains low until the supply voltage is within the operating range.
Key Specifications
| Parameter | Unit | Min | Typ | Max |
|---|---|---|---|---|
| VDD Operating Range | V | 9.5 | - | 18.0 |
| IDD Supply Current (Inputs/EN Not Connected) | mA | 0.70 | - | 1.20 |
| VINL_T INx Logic LOW Threshold (TTL) | V | 0.8 | - | 1.2 |
| VINH_T INx Logic HIGH Threshold (TTL) | V | 1.6 | - | 2.0 |
| VINL_C INx Logic Low Threshold (CMOS) | %VDD | 30 | - | 38 |
| VINH_C INx Logic High Threshold (CMOS) | %VDD | 55 | - | 70 |
| tRISE Output Rise Time (CLOAD = 2200 pF) | ns | 12 | - | 20 |
| tFALL Output Fall Time (CLOAD = 2200 pF) | ns | 9 | - | 17 |
| tDEL.MATCH Propagation Matching Between Channels | ns | 2 | - | 4 |
| VOH High Level Output Voltage | mV | 15 | - | 35 |
| VOL Low Level Output Voltage | mV | 10 | - | 25 |
Key Features
- High-Speed Operation: Provides high peak current pulses during short switching intervals, making it suitable for high-frequency applications.
- Dual Channels: Features two independent channels, each capable of driving N-channel enhancement-mode MOSFETs.
- Under-Voltage Lockout (UVLO): Internal circuitry ensures the output remains low until the supply voltage is within the operating range.
- Matched Propagation Delays: Ensures critical timing for applications requiring dual gate drives, such as synchronous rectifiers.
- TTL and CMOS Input Thresholds: Available with either TTL or CMOS input thresholds to accommodate different logic levels.
- Enable Function: Includes an enable function with logic thresholds and pull-up resistance for easy integration into system designs.
Applications
- Power Management: Suitable for various power management applications, including DC-DC converters and power supplies.
- Motor Control: Used in motor control circuits to drive MOSFETs efficiently.
- Synchronous Rectifiers: Ideal for synchronous rectifier applications due to its matched propagation delays.
- High-Frequency Switching: Applicable in high-frequency switching circuits where high peak current pulses are required.
Q & A
- What is the FAN3224TMX-F085 used for?
The FAN3224TMX-F085 is used to drive N-channel enhancement-mode MOSFETs in low-side switching applications.
- What are the input thresholds for the FAN3224TMX-F085?
The input thresholds are available in both TTL and CMOS configurations. For TTL, the logic LOW threshold is 0.8-1.2 V and the logic HIGH threshold is 1.6-2.0 V. For CMOS, the logic LOW threshold is 30-38% VDD and the logic HIGH threshold is 55-70% VDD.
- What is the operating voltage range of the FAN3224TMX-F085?
The operating voltage range is 9.5 V to 18.0 V.
- What is the under-voltage lockout (UVLO) function?
The UVLO function holds the output LOW until the supply voltage is within the operating range.
- How does the enable function work?
The enable function has logic thresholds and includes a pull-up resistance, allowing easy integration into system designs.
- What are the propagation delays for the FAN3224TMX-F085?
The propagation delays are matched between channels, with a delay of 6-16 ns for TTL inputs and 9-18 ns for CMOS inputs.
- Can the FAN3224TMX-F085 be used in high-frequency applications?
Yes, it is suitable for high-frequency applications due to its high-speed operation and ability to provide high peak current pulses.
- What is the output rise and fall time for the FAN3224TMX-F085?
The output rise time is 12-20 ns, and the output fall time is 9-17 ns, both measured with a CLOAD of 2200 pF.
- Can the FAN3224TMX-F085 be used in synchronous rectifier applications?
Yes, it is ideal for synchronous rectifier applications due to its matched propagation delays between channels.
- What is the maximum output current capability of the FAN3224TMX-F085?
The FAN3224TMX-F085 can drive up to 4 A per channel.
