Overview
The LM5107MAX/NOPB is a high-voltage gate driver designed by Texas Instruments to drive both the high-side and low-side N-channel MOSFETs in various power conversion configurations. This device is particularly suited for synchronous buck, half-bridge, and full-bridge power converters, as well as solid-state motor drives and two-switch forward power converters. The LM5107 features independent TTL-compatible inputs for controlling the high-side and low-side drivers, allowing for flexible and precise control over the MOSFETs. It also includes an integrated bootstrap diode and robust level shifter technology, enabling high-speed operation with low power consumption and excellent propagation delay matching.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Peak Output Current (Sink/Source) | 1.4 A / 1.3 A | - | - | A |
| Supply Voltage Range (VDD to VSS) | -0.3 | - | 18 | V |
| Bootstrap Supply Voltage (HB to HS) | -0.3 | - | 118 | V |
| Junction Temperature Range | -40 | - | 150 | °C |
| Propagation Delay (Typical) | - | 27 ns | - | ns |
| Rise and Fall Times (Typical at 1000 pF Load) | - | 15 ns | - | ns |
| Quiescent Current (Typical at VDD = 12V) | - | 0.6 mA | - | mA |
| Operating Current (Typical at VDD = 12V, f = 500 kHz) | - | 3.4 mA | - | mA |
Key Features
- Drives both high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations.
- High peak output current: 1.4 A sink, 1.3 A source.
- Independent TTL-compatible inputs for high-side and low-side control.
- Integrated bootstrap diode for high-side gate drive.
- Bootstrap supply voltage up to 118 V DC.
- Fast propagation times: 27 ns typical.
- Excellent propagation delay matching: 2 ns typical.
- Undervoltage lockout (UVLO) on both low-side and high-side power rails.
- Low power consumption.
- Available in SOIC and thermally enhanced WSON packages.
Applications
- Current-fed push-pull converters.
- Half and full bridge power converters.
- Solid-state motor drives.
- Two-switch forward power converters.
Q & A
- What is the peak output current of the LM5107? The LM5107 has a peak output current of 1.4 A sink and 1.3 A source.
- What are the input compatibility and control options for the LM5107? The LM5107 has independent TTL-compatible inputs for controlling the high-side and low-side drivers.
- What is the maximum bootstrap supply voltage for the LM5107? The bootstrap supply voltage can go up to 118 V DC.
- What are the typical propagation times and delay matching of the LM5107? The typical propagation times are 27 ns, and the propagation delay matching is 2 ns.
- Does the LM5107 have undervoltage lockout protection? Yes, the LM5107 includes undervoltage lockout (UVLO) protection on both the low-side and high-side power rails.
- What are the available package options for the LM5107? The LM5107 is available in SOIC and thermally enhanced WSON packages.
- What are some typical applications of the LM5107? Typical applications include current-fed push-pull converters, half and full bridge power converters, solid-state motor drives, and two-switch forward power converters.
- How does the LM5107 manage heat dissipation? For the WSON package, it is recommended to solder the exposed pad to the ground plane on the PCB to improve heat dissipation.
- What is the junction temperature range of the LM5107? The junction temperature range is from -40°C to 150°C.
- How does the LM5107 handle start-up and UVLO conditions? The LM5107 includes UVLO circuitry that monitors the supply voltage and bootstrap capacitor voltage, inhibiting the drivers until sufficient supply voltage is available.
