Overview
The LM5110-2MX from Texas Instruments is a dual 5-A compound gate driver designed to replace industry standard gate drivers with improved peak output current and efficiency. This device features two independent and identical driver channels with TTL compatible logic inputs and high current totem-pole outputs. The outputs are capable of sourcing 3A and sinking 5A, making them suitable for driving N-channel MOSFETs in various high-speed switching applications. The LM5110 combines MOS and bipolar transistors in its output stages to optimize current capability over a wide output voltage and operating temperature range, reducing drive current variation with voltage and temperature.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Output Current Capability | 5A sink / 3A source | Peak current capability from capacitive loads |
| Propagation Time | 25 ns typical | Time for signal propagation through the driver |
| Rise and Fall Times | 14 ns / 12 ns with 2 nF load | Time for output voltage to rise or fall |
| Supply Voltage Range | 3.5 V to 14 V | Recommended bias supply voltage range |
| Operating Temperature Range | -40°C to 125°C | Temperature range for device operation |
| Package Options | SOIC-8, WSON-10 (4 mm x 4 mm) | Available package types |
| UVLO (Undervoltage Lockout) | 4 V | Voltage at which the device is disabled |
| Shutdown Input | TTL compatible logic input | Input to enable/disable the driver channels |
Key Features
- Compound CMOS and bipolar outputs to reduce output current variation
- Independent TTL compatible logic inputs for each channel
- Dedicated input ground pin (IN_REF) for split supply or single supply operation
- Outputs swing from VCC to VEE, which can be negative relative to input ground
- Available in dual noninverting, dual inverting, and combination inverting plus noninverting configurations
- Shutdown input provides low power mode
- Supply rail undervoltage lockout protection
- Pin-out compatible with industry standard gate drivers
Applications
- Synchronous Rectifier Gate Drivers
- Switch-Mode Power Supply Gate Drivers
- Solenoid and Motor Drivers
- DC-DC Converters (synchronous buck, boost, or buck-boost)
- Motor Control Circuits (brushless DC motors)
- Class-D Audio Amplifiers
- Battery-Powered Tools (e.g., cordless drills)
- LED Lighting Drivers (high-efficiency LED drivers)
- Solar Inverters
- Uninterruptible Power Supplies (UPS Systems)
Q & A
- What is the peak output current capability of the LM5110-2MX?
The LM5110-2MX can sink up to 5A and source up to 3A of peak current.
- What are the typical propagation times for the LM5110-2MX?
The typical propagation time is 25 ns.
- What are the rise and fall times for the LM5110-2MX with a 2 nF load?
The rise time is 14 ns and the fall time is 12 ns with a 2 nF load.
- What is the recommended supply voltage range for the LM5110-2MX?
The recommended supply voltage range is from 3.5 V to 14 V.
- What are the available package options for the LM5110-2MX?
The device is available in SOIC-8 and WSON-10 (4 mm x 4 mm) packages.
- How does the LM5110-2MX handle undervoltage conditions?
The device features a 4 V undervoltage lockout (UVLO) to protect against low supply voltages.
- Can the LM5110-2MX be configured for single or split supply operation?
Yes, the device has a dedicated input ground pin (IN_REF) that allows for both single and split supply configurations.
- What is the purpose of the shutdown input pin on the LM5110-2MX?
The shutdown input pin allows the device to be switched to a low power standby mode when pulled below 1.5 V.
- In what types of applications is the LM5110-2MX commonly used?
The LM5110-2MX is commonly used in switch-mode power supplies, DC-DC converters, motor control circuits, Class-D audio amplifiers, and other high-speed switching applications.
- How can the drive current of the LM5110-2MX be doubled?
The drive current can be doubled by connecting the two channels in parallel.
