MIC4426BN

Product Overview

• Category: Integrated Circuit
• Use: Power MOSFET Driver
• Characteristics: High-Speed, Low-Side, Non-Inverting
• Package: 8-Pin DIP (Dual In-Line Package)
• Essence: Efficiently drives power MOSFETs in various applications
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage: 4.5V to 18V
• Output Current: 1.5A
• Input Threshold Voltage: 2.4V
• Propagation Delay: 25ns
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MIC4426BN package consists of 8 pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Supply Voltage (VDD) --| IN LO |-- Pin 2: Input Signal (IN) --| HO LI |-- Pin 3: Output Signal (HO) --| VB VS |-- Pin 4: Bootstrap Voltage (VB) --| NC NC |-- Pin 5: Not Connected (NC) --| NC NC |-- Pin 6: Not Connected (NC) --| NC NC |-- Pin 7: Not Connected (NC) --| NC NC |-- Pin 8: Not Connected (NC) |___________| ```

Functional Features

• High-speed switching capability for efficient power MOSFET driving
• Non-inverting configuration ensures proper signal polarity
• Low-side driver suitable for a wide range of applications
• Bootstrap voltage supply for high-side gate drive

Advantages and Disadvantages

Advantages

• High-speed operation allows for fast switching of power MOSFETs
• Non-inverting configuration simplifies circuit design
• Wide operating voltage range enables versatile applications
• Bootstrap voltage supply eliminates the need for an additional power supply

Disadvantages

• Limited output current (1.5A) may not be suitable for high-power applications
• Not compatible with all types of MOSFETs due to specific voltage requirements

Working Principles

The MIC4426BN is a power MOSFET driver that efficiently controls the switching of power MOSFETs in various electronic circuits. It operates by receiving an input signal (IN) and generating a corresponding output signal (HO) to drive the gate of the power MOSFET. The non-inverting configuration ensures that the output signal maintains the same polarity as the input signal.

To provide the necessary gate drive voltage, the MIC4426BN utilizes a bootstrap technique. The bootstrap voltage (VB) is generated using an external capacitor and diode connected to the high-side gate driver (VS). This eliminates the need for a separate power supply for the high-side gate drive.

Detailed Application Field Plans

The MIC4426BN finds applications in a wide range of fields, including:

1. Motor Control: Efficiently drives power MOSFETs in motor control circuits, enabling precise control of motor speed and direction.
2. Switching Power Supplies: Facilitates high-speed switching in power supply circuits, improving efficiency and reducing power losses.
3. LED Lighting: Drives power MOSFETs in LED lighting systems, enabling dimming and control of brightness levels.
4. Audio Amplifiers: Provides efficient gate drive for power MOSFETs used in audio amplifier circuits, enhancing audio performance.

Alternative Models

For those seeking alternatives to the MIC4426BN, the following models offer similar functionality:

1. IR2110: High-speed power MOSFET driver with independent high and low-side channels.
2. TC4420: Non-inverting power MOSFET driver with a wide supply voltage range.
3. MAX4426: High-speed, low-side, non-inverting power MOSFET driver with integrated protection features.

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

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