The FAN3121/FAN3122 is a single 9A high-speed, low-side gate driver from Fairchild Semiconductor Corporation. It has an industry-standard pinout with an enable input, a operating range of 4.5 to 18V, a peak sink of 11.4A at VDD = 12V, and a sink/source of 9.7A/7.1A at VOUT = 6V. It can be used in non-inverting and inverting configurations.
The document describes the FAN3121 and FAN3122 MOSFET drivers designed to drive N-channel enhancement MOSFETs in low-side switching applications. These devices provide high peak current pulses and incorporate MillerDrive architecture for efficient turn-on and turn-off processes.
Key features include an industry-standard pin-out with an enable input, a wide operating voltage range of 4.5V to 18V, and the ability to sink up to 11.4A peak at Vpp = 12V. The FAN3122 specifically offers non-inverting configuration, while the FAN3121 provides inverting functionality.
| Operating Voltage Range | 4.5 to 18V |
|---|---|
| Peak Sink Current (Vpp=12V) | 11.4A |
| Peak Source Current (Vpp=12V) | 10.6A |
| Typical Rise Time (10nF Load) | 23ns |
| Operating Temperature Range | -40°C to +125°C |
| Package Types | 3x3mm MLP-8 or SOIC-8 |
The FAN3121 uses an inverting configuration while the FAN3122 uses a non-inverting configuration.
The typical propagation delay time is 20ns.
Yes, the FAN3121/22 drivers implement an enable function on pin 3 (EN).