LM5109AMAX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM5109AMAX/NOPB is a high-voltage gate driver IC designed for driving both high-side and low-side N-channel MOSFETs in various applications such as motor control, power supplies, and inverters.

Characteristics: - High voltage capability - Fast switching speed - Low propagation delay - Wide operating temperature range - Robust protection features

Package: The LM5109AMAX/NOPB is available in a small outline package (SOIC) with 8 pins.

Essence: This IC serves as a crucial component in power electronics systems by providing efficient and reliable gate drive signals to MOSFETs, enabling precise control of power flow.

Packaging/Quantity: The LM5109AMAX/NOPB is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 7V to 100V
• Output Current Capability: ±2A
• Operating Temperature Range: -40°C to 125°C
• Rise/Fall Time: 15ns (typical)
• Maximum Duty Cycle: 50%
• Undervoltage Lockout Threshold: 6.2V (typical)

Pin Configuration

The LM5109AMAX/NOPB has the following pin configuration:

1. VDD - Power supply input
2. HO - High-side gate driver output
3. LO - Low-side gate driver output
4. VSS - Ground
5. RT - External resistor connected to set dead time
6. CT - External capacitor connected to set oscillator frequency
7. SD - Shutdown input
8. NC - No connection

Functional Features

• High-side and low-side gate drivers
• Adaptive shoot-through protection
• Integrated bootstrap diode
• Adjustable dead time
• Internal oscillator with frequency control
• Shutdown mode for power saving

Advantages and Disadvantages

Advantages: - High voltage capability allows for use in a wide range of applications - Fast switching speed enables efficient power conversion - Robust protection features enhance system reliability - Adjustable dead time provides flexibility in circuit design

Disadvantages: - Limited maximum duty cycle of 50% may restrict certain applications - Requires external components for setting dead time and oscillator frequency

Working Principles

The LM5109AMAX/NOPB operates by receiving input signals and generating high and low-side gate drive outputs to control the MOSFETs. It incorporates adaptive shoot-through protection to prevent both high-side and low-side MOSFETs from conducting simultaneously, ensuring safe operation. The integrated bootstrap diode simplifies the high-side driver circuitry.

Detailed Application Field Plans

The LM5109AMAX/NOPB finds applications in various fields including: 1. Motor control systems 2. Power supplies 3. Inverters for renewable energy systems 4. Electric vehicle powertrain control 5. Industrial automation

Detailed and Complete Alternative Models

1. LM5107 - Similar functionality with lower output current capability
2. LM5110 - Higher output current capability with additional features
3. IRS21844 - Alternative gate driver IC with similar specifications

These alternative models can be considered based on specific application requirements and design constraints.

In conclusion, the LM5109AMAX/NOPB is a versatile high-voltage gate driver IC that offers fast switching speed, robust protection features, and adjustable dead time. Its wide range of applications, along with alternative models available, make it a popular choice in power electronics systems.