Overview
The Texas Instruments LM5109BSD/NOPB is a high-voltage, half-bridge gate driver designed to drive both the high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations. This device is part of the LM5109B series and is known for its cost-effectiveness, high speed, and low power consumption. It is particularly useful in applications requiring robust level shift technology and high noise immunity.
Key Specifications
| Parameter | Value |
|---|---|
| Brand | Texas Instruments |
| Logic Type | TTL |
| Output Current | 1 A (1.0 A Sink and 1.0 A Source) |
| Supply Voltage | 14 V |
| Pin Count | 8 |
| Package Type | WSON (NGT) - 4x4 mm |
| Driver Type | MOSFET |
| Number of Outputs | 2 |
| Topology | Half Bridge |
| High and Low Sides Dependency | Independent |
| Number of Drivers | 2 |
| Bridge Type | Half Bridge |
| Polarity | Non-Inverting |
| Mounting Type | Surface Mount |
| Height | 0.8 mm |
| Dimensions | 4 x 4 x 0.8 mm |
| Operating Temperature Range | -40°C to 125°C |
Key Features
- Drives both high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations.
- Independent TTL-compatible inputs.
- Bootstrap supply voltage up to 108 V DC.
- Fast propagation times (30 ns typical) and excellent propagation delay matching (2 ns typical).
- Drives 1000-pF load with 15-ns rise and fall times.
- Supply rail undervoltage lockout (UVLO) on both low-side and high-side power rails.
- Low power consumption.
- Available in 8-pin SOIC and thermally-enhanced 8-pin WSON packages.
Applications
The LM5109BSD/NOPB is suitable for a variety of high-voltage applications, including:
- Synchronous buck converters.
- Half-bridge configurations.
- Power supplies requiring high efficiency and reliability.
- Motor control and drive systems.
- Industrial power systems and renewable energy systems.
Q & A
- What is the primary function of the LM5109BSD/NOPB?
The LM5109BSD/NOPB is a half-bridge gate driver designed to drive both the high-side and low-side N-channel MOSFETs in synchronous buck or half-bridge configurations.
- What is the output current capability of the LM5109BSD/NOPB?
The device can deliver a peak output current of 1 A (1.0 A sink and 1.0 A source).
- What is the supply voltage range for the LM5109BSD/NOPB?
The supply voltage range is up to 14 V, with a bootstrap supply voltage up to 108 V DC.
- What package types are available for the LM5109BSD/NOPB?
The device is available in 8-pin SOIC and thermally-enhanced 8-pin WSON packages.
- What are the key features of the LM5109BSD/NOPB in terms of speed and delay?
The device features fast propagation times (30 ns typical) and excellent propagation delay matching (2 ns typical).
- Does the LM5109BSD/NOPB have undervoltage lockout (UVLO) protection?
Yes, the device includes supply rail undervoltage lockout (UVLO) on both low-side and high-side power rails.
- What is the operating temperature range for the LM5109BSD/NOPB?
The operating temperature range is -40°C to 125°C.
- Is the LM5109BSD/NOPB compatible with TTL and CMOS inputs?
Yes, the device has inputs compatible with independent TTL and CMOS logic.
- What are some common applications for the LM5109BSD/NOPB?
Common applications include synchronous buck converters, half-bridge configurations, power supplies, motor control systems, and industrial power systems.
- What is the dimensions of the WSON package for the LM5109BSD/NOPB?
The WSON package dimensions are 4 x 4 x 0.8 mm.
