Overview
The onsemi FAN3278TMX is a dual 1.5A gate driver optimized for driving high-side P-channel MOSFETs and low-side N-channel MOSFETs in various applications, particularly in motor control. This device operates from a voltage rail up to 27V and is designed to provide high current during the MOSFET turn-on and turn-off transitions, minimizing switching losses. The FAN3278TMX features internal gate-drive regulators that ensure optimum gate-drive voltage across a range of supply voltages from 8V to 27V. It also includes TTL input thresholds and internal resistors to keep the external MOSFETs off during startup intervals when logic control signals may not be present.
Key Specifications
| Attribute | Value |
|---|---|
| Brand | onsemi |
| Logic Type | TTL |
| Output Current | -1 A, 1.5 A |
| Supply Voltage | 27V |
| Pin Count | 8 |
| Package Type | SOIC-8 |
| Driver Type | MOSFET |
| Number of Outputs | 2 |
| Topology | High and Low Side |
| High and Low Sides Dependency | Independent |
| Bridge Type | NMOS Bridge, PMOS Bridge |
| Polarity | Inverting, Non-Inverting |
| Mounting Type | Surface Mount |
| Dimensions | 5 x 4 x 1.5mm |
| Height | 1.5mm |
Key Features
- Optimum operating range from 8V to 27V
- Drives high-side PMOS and low-side NMOS in motor control or buck step-down applications
- Output drive-voltage magnitude limited to 13V for VDD up to 30V
- Biases each load device OFF with a 100kΩ resistor when VDD is below the operating level
- Low-voltage TTL input thresholds
- Peak gate drives at 12V: +1.5A sink, -1.0A source
- Internal resistors hold the driver off when no inputs are present
- 8-lead SOIC package
- Rated from -40°C to +125°C ambient temperature
Applications
- Motion Control - Industrial Motor
- Medical Electronics/Devices
Q & A
- What is the primary function of the FAN3278TMX?
The FAN3278TMX is a dual 1.5A gate driver designed to drive high-side P-channel MOSFETs and low-side N-channel MOSFETs in motor control and other applications.
- What is the maximum supply voltage for the FAN3278TMX?
The maximum supply voltage for the FAN3278TMX is 27V.
- What type of logic inputs does the FAN3278TMX support?
The FAN3278TMX supports TTL (Transistor-Transistor Logic) input thresholds.
- What is the package type of the FAN3278TMX?
The FAN3278TMX is available in an 8-lead SOIC (Small Outline Integrated Circuit) package.
- How many outputs does the FAN3278TMX have?
The FAN3278TMX has two independent outputs.
- What is the topology of the FAN3278TMX?
The FAN3278TMX features a high and low side topology with independent high and low sides.
- What are the typical applications of the FAN3278TMX?
The FAN3278TMX is typically used in motion control for industrial motors and in medical electronics/devices.
- How does the FAN3278TMX handle startup intervals when logic control signals are not present?
Internal resistors bias the inputs such that the external MOSFETs are kept OFF during startup intervals when logic control signals may not be present.
- What is the operating temperature range of the FAN3278TMX?
The FAN3278TMX is rated to operate from -40°C to +125°C ambient temperature.
- Can the FAN3278TMX be driven from a voltage rail less than 8V?
Yes, the FAN3278TMX can be driven from a voltage rail less than 8V, but its gate drive current is reduced in such cases.
