Overview
The FAN3227TMX from onsemi is a dual 2-A high-speed, low-side gate driver designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications. This device is part of the FAN3226-29 family and offers high peak current pulses during short switching intervals. It is available with either TTL or CMOS input thresholds, making it versatile for various applications. The FAN3227 specifically offers two non-inverting drivers, each with dual independent enable pins that default to ON if not connected. The device features internal circuitry with an under-voltage lockout function and matched internal propagation delays between channels, which is crucial for applications requiring critical timing, such as synchronous rectifiers.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VDD (Supply Voltage Range) | 4.5 | - | 18.0 | V |
| IDD (Supply Current, Inputs/EN Not Connected) - TTL | - | 0.75 | 1.20 | mA |
| IDD (Supply Current, Inputs/EN Not Connected) - CMOS | - | 0.65 | 1.05 | mA |
| Peak Sink/Source Current at VDD = 12 V | - | 3 A | - | A |
| Sink/Source Current at VOUT = 6 V | - | 2.4 A / 1.6 A | - | A |
| Output Rise Time (CLOAD = 1000 pF) | - | 12 ns | 22 ns | ns |
| Output Fall Time (CLOAD = 1000 pF) | - | 9 ns | 17 ns | ns |
| Propagation Delay Matched Between Channels | - | 2 ns | 4 ns | ns |
| Operating Ambient Temperature | -40 | - | +125 | °C |
Key Features
- Industry-standard pinouts
- 4.5-V to 18-V operating range
- Choice of TTL or CMOS input thresholds
- Dual non-inverting drivers with enable function (FAN3227)
- Internal resistors turn driver off if no inputs are connected
- MillerDrive technology for high current during the Miller plateau stage
- 12-ns/9-ns typical rise/fall times (1-nF load)
- Under 20-ns typical propagation delay matched within 1 ns to the other channel
- Double current capability by paralleling channels
- 8-lead SOIC package
- AEC-Q100 qualified and PPAP capable
- Pb-free devices
Applications
- Switch-mode power supplies
- High-efficiency MOSFET switching
- Synchronous rectifier circuits
- DC-to-DC converters
- Motor control
- Servers
- Automotive-qualified systems
Q & A
- What is the operating voltage range of the FAN3227?
The FAN3227 operates within a voltage range of 4.5 V to 18 V.
- What types of input thresholds are available for the FAN3227?
The FAN3227 is available with either TTL or CMOS input thresholds.
- What is the peak current capability of the FAN3227 at VDD = 12 V?
The peak sink/source current at VDD = 12 V is 3 A.
- How do the enable pins function on the FAN3227?
The enable pins (ENA and ENB) have TTL thresholds and default to ON if not connected.
- What is the MillerDrive technology used in the FAN3227?
The MillerDrive technology is a bipolar-MOSFET combination that provides high current during the Miller plateau stage of the MOSFET turn-on/turn-off process to minimize switching loss.
- What is the typical rise and fall time of the FAN3227?
The typical rise time is 12 ns, and the typical fall time is 9 ns, both measured with a 1-nF load.
- Can the FAN3227 be used in automotive applications?
- What is the package type of the FAN3227?
The FAN3227 is available in an 8-lead SOIC package.
- Is the FAN3227 Pb-free?
- What are some common applications of the FAN3227?
