LM5112SD

Product Overview

Category: Integrated Circuit (IC)

Use: The LM5112SD is a high-voltage gate driver designed for driving both high-side and low-side N-channel MOSFETs in a synchronous buck or half-bridge configuration. It is commonly used in power electronics applications such as motor drives, solar inverters, and switch-mode power supplies.

Characteristics: - High voltage capability - Fast switching speed - Low propagation delay - Wide operating temperature range - Compact package size

Package: The LM5112SD is available in a small outline package (SOIC) with 8 pins.

Essence: The LM5112SD is an essential component in power electronic systems that require efficient and reliable switching of high-voltage MOSFETs.

Packaging/Quantity: The LM5112SD is typically sold in reels containing 250 units per reel.

Specifications

• Supply Voltage Range: 4.5V to 15V
• Maximum Output Current: 2A
• Operating Temperature Range: -40°C to 125°C
• Rise/Fall Time: 10ns (typical)
• Input Logic Compatibility: CMOS, TTL

Pin Configuration

The LM5112SD features the following pin configuration:

1. VDD: Power supply input
2. HO: High-side gate drive output
3. LO: Low-side gate drive output
4. LIN: Logic input for low-side MOSFET
5. HIN: Logic input for high-side MOSFET
6. GND: Ground reference
7. NC: No connection
8. VSS: Negative power supply input

Functional Features

• High-side and low-side gate drivers in one package
• Independent logic inputs for precise control
• Adaptive shoot-through protection
• Undervoltage lockout (UVLO) protection
• Integrated bootstrap diode for high-side gate drive

Advantages and Disadvantages

Advantages: - Compact package size allows for space-efficient designs - High voltage capability enables use in a wide range of applications - Fast switching speed improves overall system efficiency - Adaptive shoot-through protection prevents MOSFET damage

Disadvantages: - Limited maximum output current may restrict usage in high-power applications - Requires external components for proper operation - Higher cost compared to standard gate drivers

Working Principles

The LM5112SD operates by receiving logic input signals (LIN and HIN) to control the high-side and low-side MOSFETs. It generates the necessary gate drive voltages to switch the MOSFETs on and off rapidly, allowing efficient power conversion. The integrated bootstrap diode simplifies the high-side gate drive circuitry.

Detailed Application Field Plans

The LM5112SD is widely used in various applications, including: 1. Motor drives: Provides precise control over motor speed and direction. 2. Solar inverters: Enables efficient conversion of solar energy into usable AC power. 3. Switch-mode power supplies: Facilitates high-frequency switching for efficient power conversion.

Alternative Models

For those seeking alternatives to the LM5112SD, the following models can be considered: 1. IR2110: A popular high-voltage gate driver with similar features. 2. LTC4444: Offers higher output current capability for demanding applications. 3. MAX44284: Provides enhanced protection features and lower propagation delay.

Please note that these alternative models may have different pin configurations and specifications.