Overview
The FAN3122CMX-F085 is a high-speed, low-side gate driver designed by onsemi to drive N-channel enhancement MOSFETs in various switching applications. This device is part of the FAN3121 and FAN3122 series, which are known for their high peak current pulses and robust performance. The FAN3122CMX-F085 is particularly suited for automotive and high-reliability applications due to its AEC-Q100 automotive qualification.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Supply Voltage (VDD) | 4.5 | - | 18.0 | V |
| Supply Current (IDD) - TTL | - | 0.65 | 0.90 | mA |
| Supply Current (IDD) - CMOS | - | 0.58 | 0.85 | mA |
| Device Turn-On Voltage (UVLO) | 3.5 | 4.0 | 4.3 | V |
| Device Turn-Off Voltage (UVLO) | 3.25 | 3.75 | 4.15 | V |
| Peak Sink Current (IPK_SINK) | - | - | 11.4 | A |
| Peak Source Current (IPK_SOURCE) | - | - | 10.6 | A |
| Output Rise Time (tRISE) | 18 | 23 | 29 | ns |
| Output Fall Time (tFALL) | 11 | 19 | 27 | ns |
| Propagation Delay (tD1, tD2) - CMOS | 9 | 18 | 28 | ns |
| Propagation Delay (tD1, tD2) - TTL | 9 | 23 | 35 | ns |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- Industry-standard pin-out with enable input (EN)
- Operating range: 4.5 V to 18 V
- High peak current: 11.4 A sink, 10.6 A source
- Inverting (FAN3121) and non-inverting (FAN3122) configurations
- Internal resistors to turn driver off if no inputs are present
- Fast rise and fall times: 18 ns to 29 ns rise, 11 ns to 27 ns fall
- MillerDrive technology for enhanced performance during MOSFET turn-on/turn-off
- Available in thermally enhanced 3x3 mm 8-lead MLP and 8-lead SOIC packages (Pb-free finish)
- AEC-Q100 automotive qualification for F085 versions
- Internal under-voltage lockout (UVLO) function
- Enable function with logic thresholds for TTL and CMOS inputs
Applications
- Synchronous rectifier circuits
- High-efficiency MOSFET switching
- Switch-mode power supplies
- DC-to-DC converters
- Motor control systems
- Automotive-qualified systems (F085 versions)
Q & A
- What is the operating voltage range of the FAN3122CMX-F085?
The operating voltage range is from 4.5 V to 18 V.
- What are the peak current capabilities of the FAN3122CMX-F085?
The device can sink up to 11.4 A and source up to 10.6 A.
- What are the typical rise and fall times for the FAN3122CMX-F085?
The typical rise time is 23 ns, and the typical fall time is 19 ns.
- Does the FAN3122CMX-F085 have an enable function?
Yes, it has an enable input (EN) with logic thresholds for both TTL and CMOS inputs.
- What is the operating temperature range of the FAN3122CMX-F085?
The operating temperature range is from -40°C to +125°C.
- Is the FAN3122CMX-F085 automotive-qualified?
Yes, the F085 version is AEC-Q100 automotive-qualified.
- What are the package options for the FAN3122CMX-F085?
The device is available in thermally enhanced 3x3 mm 8-lead MLP and 8-lead SOIC packages.
- What is the MillerDrive technology used in the FAN3122CMX-F085?
MillerDrive technology is a bipolar/MOSFET combination that provides high peak current during the Miller plateau stage of the MOSFET turn-on/turn-off process.
- Does the FAN3122CMX-F085 have internal under-voltage lockout (UVLO) function?
Yes, it has an internal UVLO function that holds the output low until the supply voltage is within the operating range.
- What are some common applications for the FAN3122CMX-F085?
Common applications include synchronous rectifier circuits, high-efficiency MOSFET switching, switch-mode power supplies, DC-to-DC converters, and motor control systems.
