LM5101ASD/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Voltage Gate Driver
• Package: SOIC-8
• Essence: The LM5101ASD/NOPB is a high voltage gate driver IC designed to drive both the high-side and low-side N-channel MOSFETs in a synchronous buck or half-bridge configuration.
• Packaging/Quantity: The LM5101ASD/NOPB is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: -0.3V to 14V
• Output Voltage Range: -0.3V to 14V
• Supply Voltage Range: 10V to 14V
• Operating Temperature Range: -40°C to 125°C
• Switching Frequency: Up to 2MHz
• Peak Output Current: ±2A
• Propagation Delay: 50ns (typical)

Pin Configuration

The LM5101ASD/NOPB has the following pin configuration:

1. VDD: Supply Voltage
2. HO: High-Side Gate Drive Output
3. LO: Low-Side Gate Drive Output
4. VSS: Ground
5. SD: Shutdown Input
6. RT: Oscillator Timing Resistor
7. CT: Oscillator Timing Capacitor
8. VB: Bootstrap Supply Voltage

Functional Features

• High voltage capability allows driving of N-channel MOSFETs in high-power applications.
• Integrated bootstrap diode simplifies the high-side gate drive circuitry.
• Adaptive shoot-through protection prevents simultaneous conduction of high-side and low-side MOSFETs.
• Internal undervoltage lockout (UVLO) ensures proper operation under varying supply voltage conditions.
• Integrated thermal shutdown protects the IC from excessive temperature.

Advantages and Disadvantages

Advantages: - High voltage capability enables use in high-power applications. - Integrated bootstrap diode simplifies circuit design. - Adaptive shoot-through protection enhances system reliability. - Internal undervoltage lockout ensures proper operation under varying supply voltage conditions.

Disadvantages: - Limited peak output current may restrict usage in certain high-current applications. - Propagation delay of 50ns may impact switching speed in some high-frequency designs.

Working Principles

The LM5101ASD/NOPB is designed to drive N-channel MOSFETs in a synchronous buck or half-bridge configuration. It utilizes a bootstrap technique to generate a high-side gate drive voltage above the supply voltage. This allows efficient switching of the high-side MOSFET without requiring an additional power supply.

The adaptive shoot-through protection prevents both the high-side and low-side MOSFETs from conducting simultaneously, reducing the risk of short circuits and improving overall system reliability.

The internal undervoltage lockout feature ensures that the IC operates within specified voltage limits, protecting it from potential damage due to insufficient supply voltage.

Application Field Plans

The LM5101ASD/NOPB is commonly used in various power management applications, including:

1. Switching Power Supplies
2. Motor Drives
3. Solar Inverters
4. LED Lighting Systems
5. Battery Charging Systems

Its high voltage capability and integrated features make it suitable for driving high-power N-channel MOSFETs in these applications, enabling efficient power conversion and control.

Alternative Models

1. LM5113: Dual Channel High Voltage Gate Driver
2. IRS21844: Half-Bridge Gate Driver IC
3. MAX15062: High-Speed MOSFET Driver
4. FAN7382: High and Low Side Gate Driver

These alternative models offer similar functionality and can be considered as alternatives to the LM5101ASD/NOPB based on specific application requirements.

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