LM5118MHX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High voltage, high-side and low-side gate driver - Wide input voltage range - Adjustable dead-time control - Integrated bootstrap diode - Thermal shutdown protection - Under-voltage lockout protection

Package: 20-TSSOP (Thin Shrink Small Outline Package)

Essence: The LM5118MHX/NOPB is a high voltage gate driver IC designed for power management applications. It provides efficient switching control for high-side and low-side power MOSFETs in various power conversion circuits.

Packaging/Quantity: The LM5118MHX/NOPB is available in a 20-TSSOP package. Each package contains one IC.

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0V to 100V
• Maximum Output Current: 2A
• Operating Temperature Range: -40°C to +125°C
• Rise/Fall Time: 15ns (typical)
• Supply Current: 1.6mA (typical)

Pin Configuration

The LM5118MHX/NOPB has the following pin configuration:

1. VDD - Power supply voltage for the IC
2. HO - High-side gate driver output
3. LO - Low-side gate driver output
4. BOOT - Bootstrap capacitor connection for high-side gate driver
5. PH - PWM input for high-side gate driver
6. PL - PWM input for low-side gate driver
7. RT - Dead-time control resistor connection
8. CT - Oscillator timing capacitor connection
9. GND - Ground reference for the IC
10. PGND - Power ground reference for the IC
11. VCC - Power supply voltage for the gate drivers
12. HO2 - Additional high-side gate driver output
13. LO2 - Additional low-side gate driver output
14. NC - No connection
15. NC - No connection
16. NC - No connection
17. NC - No connection
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

• High voltage gate driver: Enables efficient control of power MOSFETs in high voltage applications.
• Adjustable dead-time control: Allows precise timing control between high-side and low-side switching to prevent shoot-through current.
• Integrated bootstrap diode: Simplifies the gate drive circuitry by eliminating the need for an external diode.
• Thermal shutdown protection: Safeguards the IC from excessive temperature, preventing damage.
• Under-voltage lockout protection: Ensures proper operation by disabling the gate drivers when the supply voltage falls below a specified threshold.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows versatile use in various power management applications. - Adjustable dead-time control provides flexibility in optimizing switching performance. - Integrated bootstrap diode simplifies circuit design and reduces component count. - Thermal shutdown and under-voltage lockout protections enhance reliability and safety.

Disadvantages: - Limited maximum output current may restrict usage in high-power applications. - The 20-TSSOP package may require careful PCB layout considerations for optimal thermal dissipation.

Working Principles

The LM5118MHX/NOPB operates by receiving PWM (Pulse Width Modulation) signals on the PH and PL pins. These signals control the switching of the high-side and low-side gate drivers, respectively. The adjustable dead-time control ensures that there is no overlap between the high-side and low-side MOSFETs' conduction periods, preventing shoot-through current.

The integrated bootstrap diode generates the necessary gate drive voltage for the high-side MOSFET by utilizing the voltage across the low-side MOSFET during its off state. This eliminates the need for an external diode and simplifies the gate drive circuitry.

Thermal shutdown protection activates when the IC's temperature exceeds a specified threshold, shutting down the gate drivers to prevent damage. Under-voltage lockout protection disables the gate drivers if the supply voltage falls below a certain level, ensuring proper operation.

Detailed Application Field Plans

The LM5118MHX/NOPB is suitable for various power management applications, including but not limited to: - Switching power supplies - Motor drives - Solar inverters - LED lighting - Battery chargers

Its wide input voltage range, adjustable dead-time control, and integrated bootstrap diode make it versatile in different power conversion circuits.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM5118MHX/NOPB are: - LM5117: High voltage gate driver with adjustable dead-time control. - LM5109: High voltage gate driver with integrated