Overview
The LM5110-2MX/NOPB from Texas Instruments is a dual-channel, high-voltage, high-frequency gate driver IC designed to drive N-channel MOSFETs or IGBTs in various high-speed switching applications. This device is part of the LM5110 family, which replaces industry-standard gate drivers with improved peak output current and efficiency. The LM5110 features two independent and identical driver channels with TTL-compatible logic inputs and high-current totem-pole outputs. It is available in SOIC-8 and WSON-10 packages, making it versatile for different design requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current Capability | 5A sink / 3A source | A |
| Propagation Time | 25 ns (typical) | ns |
| Rise and Fall Times | 14 ns / 12 ns (with 2 nF load) | ns |
| Input Compatibility | TTL compatible | - |
| Output Voltage Swing | VCC to VEE (can be negative relative to input ground) | V |
| Shutdown Input | TTL compatible logic input | - |
| Package Options | SOIC-8, WSON-10 (4 mm x 4 mm) | - |
| Junction-to-Ambient Thermal Resistance (SOIC-8) | 114 °C/W | °C/W |
Key Features
- Compound CMOS and bipolar outputs to reduce output current variation with voltage and temperature.
- Independent inputs (TTL compatible) and outputs that can be connected in parallel to double the drive current capability.
- Fast propagation times (25 ns typical) and fast rise and fall times (14 ns/12 ns with 2 nF load).
- 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.
- Shutdown input provides low power mode with total supply current less than 25 µA.
- Supply rail undervoltage lockout protection.
- Pin-out compatible with industry standard gate drivers.
Applications
- Switch-Mode Power Supplies (SMPS): Drives high-speed switching MOSFETs to improve efficiency and reduce heat.
- DC-DC Converters: Essential in synchronous buck, boost, or buck-boost converters to drive MOSFETs for efficient conversion.
- Motor Control Circuits: Used in motor driver circuits for brushless DC motors to switch the MOSFETs that control the motor phases.
- Class-D Audio Amplifiers: Utilized to drive the output MOSFETs, ensuring high fidelity and efficient amplification.
- Battery-Powered Tools: Helps in driving high-current MOSFETs in devices like cordless drills, where efficient power management is critical.
- LED Lighting Drivers: Used in high-efficiency LED drivers for pulse-width modulation dimming and current control.
- Solar Inverters: Used in the drive circuitry for the efficient conversion of DC generated by solar panels to AC.
Q & A
- What is the LM5110-2MX/NOPB used for?
The LM5110-2MX/NOPB is used to drive N-channel MOSFETs or IGBTs in high-speed switching applications such as switch-mode power supplies, DC-DC converters, motor control circuits, and more.
- What are the key features of the LM5110-2MX/NOPB?
Key features include compound CMOS and bipolar outputs, fast propagation times, dedicated input ground pin, shutdown input, and supply rail undervoltage lockout protection.
- What are the output current capabilities of the LM5110-2MX/NOPB?
The device can source 3A and sink 5A of current.
- What are the typical propagation and rise/fall times of the LM5110-2MX/NOPB?
The typical propagation time is 25 ns, and the rise and fall times are 14 ns and 12 ns, respectively, with a 2 nF load.
- What packages is the LM5110-2MX/NOPB available in?
The device is available in SOIC-8 and WSON-10 (4 mm x 4 mm) packages.
- How does the shutdown input function on the LM5110-2MX/NOPB?
The shutdown input pin (nSHDN) is a TTL compatible logic input that switches the device to a low power standby mode when pulled below 1.5V, reducing the total supply current to less than 25 µA.
- What is the purpose of the dedicated input ground pin (IN_REF) on the LM5110-2MX/NOPB?
The dedicated input ground pin (IN_REF) allows for single supply or split supply configurations and provides negative drive capability.
- Can the LM5110-2MX/NOPB be used in motor control applications?
- Is the LM5110-2MX/NOPB suitable for high-efficiency LED drivers?
- What is the thermal resistance of the LM5110-2MX/NOPB in the SOIC-8 package?
The junction-to-ambient thermal resistance for the SOIC-8 package is 114 °C/W.
