Overview
The FAN3122TMX-F085 is a high-speed, low-side gate driver designed by onsemi to drive N-channel enhancement MOSFETs in various switching applications. This driver is part of the FAN3121 and FAN3122 series, which are known for their high peak current pulses and robust performance. The FAN3122TMX-F085 is available in an 8-lead SOIC package and is automotive-qualified to AEC-Q100 standards, making it suitable for demanding automotive and industrial environments.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDD Operating Range | 4.5 | 18.0 | V | ||
| IDD Supply Current (TTL) | Inputs / EN Not Connected | 0.65 | 0.90 | 1.00 | mA |
| IDD Supply Current (CMOS) | Inputs / EN Not Connected | 0.58 | 0.85 | mA | |
| VON Device Turn-On Voltage (UVLO) | 3.5 | 4.0 | 4.3 | V | |
| VOFF Device Turn-Off Voltage (UVLO) | 3.30 | 3.75 | 4.10 | V | |
| Peak Sink Current at VDD = 12 V | 11.4 | A | |||
| Sink / Source Current at VOUT = 6 V | 9.7 / 7.1 | A | |||
| Output Rise Time (CLOAD = 10 nF) | 18 | 23 | 29 | ns | |
| Output Fall Time (CLOAD = 10 nF) | 11 | 19 | 27 | ns | |
| Propagation Delay Time | 9 | 18 | 28 | ns |
Key Features
- Industry-Standard Pin-out with Enable Input
- 4.5-V to 18-V Operating Range
- High Peak Current Capability: 11.4 A Peak Sink at VDD = 12 V, 9.7-A Sink / 7.1-A Source at VOUT = 6 V
- Inverting (FAN3121) and Non-Inverting (FAN3122) Configurations
- Internal Resistors Turn Driver Off If No Inputs
- Fast Switching Times: 23-ns / 19-ns Typical Rise/Fall Times (10 nF Load)
- Choice of TTL or CMOS Input Thresholds
- MillerDrive Technology for Enhanced Performance During MOSFET Turn-On/Off
- Available in Thermally Enhanced 3x3 mm 8-Lead MLP or 8-Lead SOIC Package (Pb-Free Finish)
- Rated from –40°C to +125°C
- Automotive Qualified to AEC-Q100 (F085 Versions)
Applications
- Synchronous Rectifier Circuits
- High-Efficiency MOSFET Switching
- Switch-Mode Power Supplies
- DC-to-DC Converters
- Motor Control
- Automotive-Qualified Systems (F085 Versions)
Q & A
- What is the operating voltage range of the FAN3122TMX-F085?
The operating voltage range is from 4.5 V to 18 V.
- What are the peak current capabilities of the FAN3122TMX-F085?
The driver can deliver up to 11.4 A peak sink current at VDD = 12 V and 9.7 A sink / 7.1 A source at VOUT = 6 V.
- What are the typical rise and fall times of the FAN3122TMX-F085?
The typical rise and fall times are 23 ns and 19 ns, respectively, with a 10 nF load.
- Does the FAN3122TMX-F085 support both TTL and CMOS input thresholds?
- What is the MillerDrive technology used in the FAN3122TMX-F085?
The MillerDrive technology is a bipolar/MOSFET combination that provides the highest peak current during the Miller plateau stage of the MOSFET turn-on/turn-off process.
- What are the package options available for the FAN3122TMX-F085?
The driver is available in a thermally enhanced 3x3 mm 8-lead MLP package or an 8-lead SOIC package.
- Is the FAN3122TMX-F085 automotive-qualified?
- What is the temperature range for the FAN3122TMX-F085?
The device is rated from –40°C to +125°C.
- What are some common applications of the FAN3122TMX-F085?
- How does the enable function work on the FAN3122TMX-F085?
The enable function is on pin 3 (EN), which is internally pulled up to VDD for active HIGH logic and can be left open for standard operation.
- What is the under-voltage lockout (UVLO) function in the FAN3122TMX-F085?
The UVLO function holds the output low until the supply voltage is within the operating range.
