Overview
The FL3100TMPX is a low-side gate driver IC designed by onsemi, optimized for driving N-channel enhancement-mode MOSFETs in various applications, particularly in smart LED lighting systems. This component is part of the FL3100T series and is available in a 6-lead, 2 x 2 mm Molded Leadless Package (MLP) and a 5-pin SOT23 package. It features non-inverting input logic with a DIM control input for precise PWM dimming, making it suitable for hybrid dimming scenarios.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VDD) | 4.5 | - | 18.0 | V |
| Operating Ambient Temperature (TA) | -40 | - | 125 | °C |
| Input Voltage (VIN) | 0 | - | VDD + 0.3 | V |
| Output Current, Mid-Voltage, Sinking (ISINK) | - | 2.5 | - | A |
| Output Current, Mid-Voltage, Sourcing (ISOURCE) | - | -1.8 | - | A |
| Output Rise Time (tRISE) | - | 13 | 20 | ns |
| Output Fall Time (tFALL) | - | 9 | 14 | ns |
| Propagation Delay (tD1, tD2) | - | 9-16 | 30 | ns |
Key Features
- Non-inverting input logic with DIM control input for PWM dimming down to 0.1% for hybrid dimming.
- Operating voltage range of 4.5 to 18 V.
- TTL inputs independent of supply voltage.
- High peak current capability: 2.5 A sink and 1.8 A source at VOUT = 6 V.
- Internal resistors to turn the driver off if no inputs are connected.
- Fast switching performance with typical rise and fall times of 13 ns and 9 ns, respectively.
- MillerDrive™ technology for enhanced switching speed.
- Under-voltage lockout (UVLO) function to ensure orderly startup.
- Available in 6-lead, 2 x 2 mm MLP and 5-pin SOT23 packages.
- Rated from -40°C to 125°C ambient temperature.
Applications
- Smart LED drivers with accurate PWM dimming.
- General LED lighting applications.
- MCU-driven hybrid dimming applications using both amplitude and PWM dimming.
- Wired or wireless interface-controlled dimming (e.g., DALI, ZigBee).
Q & A
- What is the primary function of the FL3100TMPX?
The FL3100TMPX is a low-side gate driver designed to drive N-channel enhancement-mode MOSFETs in low-side switching applications, particularly in smart LED lighting systems.
- What are the available packages for the FL3100TMPX?
The FL3100TMPX is available in a 6-lead, 2 x 2 mm Molded Leadless Package (MLP) and a 5-pin SOT23 package.
- What is the operating voltage range of the FL3100TMPX?
The operating voltage range is from 4.5 V to 18 V.
- How does the DIM control input function?
The DIM control input is used for PWM dimming, allowing for precise control of the LED current down to 0.1% in hybrid dimming scenarios.
- What is the significance of MillerDrive™ technology in the FL3100TMPX?
MillerDrive™ technology enhances switching speed by providing high current during the Miller plateau region, speeding up the turn-on and turn-off process of the MOSFET.
- What is the purpose of the under-voltage lockout (UVLO) function?
The UVLO function ensures that the IC starts up in an orderly fashion by holding the output LOW until the supply voltage is within the operating range.
- How should the VDD bypass capacitor be configured?
A local, high-frequency bypass capacitor with low ESR and ESL should be connected between the VDD and GND pins with minimal trace length.
- What are the thermal characteristics of the FL3100TMPX?
The thermal characteristics include junction-to-lead thermal resistance (θJL) and junction-to-ambient thermal resistance (θJA), which vary depending on the package type.
- What are the recommended layout and connection guidelines?
Keep high-current output and power ground paths separate from logic input signals, keep the driver close to the load, and ensure proper ground connections based on the package type.
- Can the FL3100TMPX be used for high-side P-channel MOSFETs?
No, the FL3100TMPX is not suitable for driving high-side P-channel MOSFETs due to its low output voltage when VDD is below the operational threshold.
