Overview
The LM5104MX/NOPB is a high-voltage half-bridge gate driver designed by Texas Instruments. This device is specifically engineered to drive both the high-side and low-side N-channel MOSFETs in synchronous buck, half-bridge, and full-bridge configurations. It features a floating high-side driver capable of operating with supply voltages up to 100 V, making it suitable for a wide range of high-voltage switching applications such as motor drives, power supplies, and DC-DC converters. The LM5104MX/NOPB is controlled from a single input and includes adaptive transition timing and an additional programmable delay to prevent shoot-through issues. It also integrates a high-voltage diode for charging the high-side gate drive bootstrap capacitor and includes undervoltage lockout on both power rails.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC (D), WSON-10 | - |
| Pins | 8 (SOIC), 10 (WSON) | - |
| Operating Temperature Range | -40 to 125 | °C |
| Output Current | -1.8 to 1.6 | A |
| Bootstrap Supply Voltage Range | Up to 118 V DC | V |
| Turnoff Propagation Delay | 25 ns (Typical) | ns |
| Rise and Fall Times | 15 ns (Typical) | ns |
| Load Drive Capability | 1000 pF | pF |
| Undervoltage Lockout (UVLO) | 8 V (Typical) | V |
Key Features
- High-Speed Switching: Enables fast switching transitions for efficient power conversion.
- Adaptive Rising and Falling Edges with Programmable Additional Delay: Allows optimization of gate drive timings to account for device differences between high-side and low-side positions.
- Single Input Control: Direct drive from lower cost PWM controllers.
- Bootstrap Supply Voltage Range up to 118 V DC: Provides flexibility in various high-voltage applications.
- Fast Turnoff Propagation Delay (25 ns Typical): Ensures quick and efficient switching.
- Drives 1000-pF Loads With 15-ns Rise and Fall Times: Capable of driving large capacitive loads efficiently.
- Supply Rail Undervoltage Lockout: Protects against undervoltage conditions on both power rails.
- Integrated High-Voltage Diode: Reduces parts count and PCB real estate by integrating the bootstrap diode.
- Robust Level Shifter: Operates at high speed while consuming low power and providing clean level transitions.
Applications
- Motor Drives: Ideal for motor drive applications requiring high-performance gate drivers.
- Power Supplies: Used in high-frequency power supply circuits for efficient power conversion.
- Renewable Energy Systems: Suitable for driving power switches in renewable energy systems like solar inverters.
- Current Fed Push-Pull Power Converters: Applicable in various power converter configurations.
- High Voltage Buck Regulators: Used in high-voltage buck regulator circuits.
- Active Clamp Forward Power Converters: Suitable for active clamp forward power converter applications.
- Half-Bridge and Full-Bridge Converters: Used in half-bridge and full-bridge power converter configurations.
Q & A
- What is the LM5104MX/NOPB?
The LM5104MX/NOPB is a high-voltage, half-bridge gate driver IC designed by Texas Instruments, specifically for driving both the high-side and low-side N-channel power MOSFETs in high-voltage switching applications.
- How does the LM5104MX/NOPB work?
The LM5104MX/NOPB works by providing the necessary drive voltage and current to the high-side and low-side MOSFETs in a half-bridge configuration. It utilizes a bootstrap technique to provide the high-side gate drive voltage above the input supply voltage and features adaptive shoot-thru protection and an integrated high-side diode.
- What are the key features of the LM5104MX/NOPB?
The key features include high-speed switching, adaptive rising and falling edges with programmable additional delay, single input control, bootstrap supply voltage range up to 118 V DC, fast turnoff propagation delay, and integrated high-voltage diode.
- What are the typical applications of the LM5104MX/NOPB?
Typical applications include motor drives, power supplies, renewable energy systems, current fed push-pull power converters, high voltage buck regulators, active clamp forward power converters, and half-bridge and full-bridge converters.
- What is the operating temperature range of the LM5104MX/NOPB?
The operating temperature range is -40°C to 125°C.
- What is the output current capability of the LM5104MX/NOPB?
The output current capability is -1.8 A to 1.6 A.
- Does the LM5104MX/NOPB have built-in protection features?
Yes, it includes undervoltage lockout on both power rails and other protection features such as overcurrent and overtemperature protection.
- What packages are available for the LM5104MX/NOPB?
The device is available in SOIC (D) and WSON-10 packages.
- How does the adaptive shoot-thru protection work in the LM5104MX/NOPB?
The adaptive shoot-thru protection monitors the bottom gate voltage and triggers a programmable delay generator to prevent the high-side and low-side MOSFETs from conducting simultaneously, thereby preventing shoot-through current.
- Are there any equivalents or alternatives to the LM5104MX/NOPB?
Some equivalents include the IR2104 from Infineon, the HIP2100 from Renesas, the FAN7382 from Fairchild Semiconductor, and the IRS21844S from International Rectifier.
