Overview
The FAN3100TSX is a 2 A high-speed, low-side gate driver designed by onsemi to drive N-channel enhancement-mode MOSFETs in low-side switching applications. It provides high peak current pulses during short switching intervals, making it ideal for high-frequency power converter designs. The driver is available with either TTL (FAN3100TSX) or CMOS (FAN3100CSX) input thresholds. Internal circuitry includes an under-voltage lockout function to ensure the output remains low until the supply voltage is within the operating range. The FAN3100TSX incorporates MillerDrive™ architecture, a bipolar-MOSFET combination that minimizes switching loss and provides rail-to-rail voltage swing and reverse current capability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Range (VDD) | 4.5 | 18.0 | V | |
| Peak Sink/Source Current at VDD = 12 V | 3 A | A | ||
| Sink/Source Current at VOUT = 6 V | 2.5 A / 1.8 A | A | ||
| Rise Time (Typical with 1 nF Load) | 13 ns | ns | ||
| Fall Time (Typical with 1 nF Load) | 9 ns | ns | ||
| Propagation Delay Time | < 20 ns | ns | ||
| Operating Temperature Range | -40°C | 125°C | °C | |
| Package Options | 6-Lead 2x2 mm MLP, 5-Pin SOT23 |
Key Features
- Dual-logic inputs allowing configuration as non-inverting or inverting with an enable function.
- Internal resistors to turn the driver off if no inputs are connected, ensuring the power MOSFET remains off.
- MillerDrive™ architecture for high peak current during the Miller plateau stage, minimizing switching loss and providing rail-to-rail voltage swing and reverse current capability.
- Choice of TTL or CMOS input thresholds, with hysteresis voltage to prevent noise-induced retriggering.
- Fast MOSFET switching performance to maximize efficiency in high-frequency power converter designs.
- Lead-free finish in 2x2 mm 6-lead Molded Leadless Package (MLP) or industry-standard 5-pin SOT23 packages for excellent thermal performance.
Applications
- AC-DC merchant power supplies for servers and workstations.
- Switch-mode power supplies (SMPS).
- Motor control products.
Q & A
- What is the primary function of the FAN3100TSX?
The FAN3100TSX is designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications by providing high peak current pulses during short switching intervals.
- What are the input threshold options for the FAN3100TSX?
The FAN3100TSX is available with either TTL or CMOS input thresholds.
- What is the operating voltage range of the FAN3100TSX?
The operating voltage range is from 4.5 V to 18 V.
- What are the typical rise and fall times of the FAN3100TSX with a 1 nF load?
The typical rise time is 13 ns, and the typical fall time is 9 ns.
- What is the propagation delay time of the FAN3100TSX?
The propagation delay time is typically under 20 ns.
- What are the package options for the FAN3100TSX?
The FAN3100TSX is available in a 6-lead 2x2 mm Molded Leadless Package (MLP) and a 5-pin SOT23 package.
- What is the MillerDrive™ architecture and its benefits?
The MillerDrive™ architecture is a bipolar-MOSFET combination that provides high peak current during the Miller plateau stage, minimizing switching loss and providing rail-to-rail voltage swing and reverse current capability.
- How does the under-voltage lockout function work in the FAN3100TSX?
The under-voltage lockout function holds the output low until the supply voltage is within the operating range, ensuring safe operation.
- What are some common applications of the FAN3100TSX?
Common applications include AC-DC merchant power supplies for servers and workstations, switch-mode power supplies (SMPS), and motor control products.
- How do the internal resistors function if no inputs are connected?
If no inputs are connected, internal resistors bias the inputs such that the output is pulled low to hold the power MOSFET off.
