MAX9402EHJ+

The MAX9402EHJ+ is an ultra-low voltage, dual low-side MOSFET driver tailored for use in automotive, industrial and consumer applications such as window lift and door locks. This dual MOSFET driver utilizes a 1A current limited push-pull driver and two low charge injection, low-side MOSFET drivers in a compact 10-pin TDFN package. The 1A wide body MOSFET driver embedded in this device offers fast switching performance, low on-resistance, and can be used to switch medium current output loads.

Pinout

The MAX9402EHJ+ has a single-ended 10-pin TDFN package, with 8 pins for input/output and 2 pins for power supply. This 10-pin TDFN package includes four logic inputs, two negative current sense inputs, two positive current sense inputs, an output enable pin, and an output control pin.

Application Field

The MAX9402EHJ+ can be used in a wide variety of automotive, industrial, and consumer applications, such as automotive window lift, door locks, power steering, and fuel dampers, as well as in power switches, motor on/off, relays, and intelligent flow controllers.

Working Principle

The MAX9402EHJ+ utilizes a low charge injection, low-side MOSFET driver to drive medium current output loads, with fast switching performance and low on-resistance. The MOSFET driver has 4 logic inputs, 2 negative current sense inputs, and 2 positive current sense inputs, and an output enable pin. To use the MAX9402EHJ+, the user must first connect the power supply to the correct pins; the voltage should be between -0.3V to 12V. The logic signal is inputted to the 4 logic inputs. The output is connected to the output control pin and the output enable pin. Finally, the control signals connected to the +CS and –CS inputs provide current limit protection.

In order to protect the MAX9402EHJ+ from over-current, the +CS and -CS inputs are used to limit the maximum current. When the current level exceeds the specified limit, the output driver is disabled and the MOSFET becomes isolated. The maximum current level can be adjusted by changing the resistor values connected to the +CS and −CS inputs.

The MAX9402EHJ+ is a powerful and versatile device, and can be used in a wide variety of applications. It is easy to use, has a compact form factor, and is cost-effective. It is the perfect choice for automotive, industrial and consumer applications requiring fast switching performance, low on-resistance, and current limit protection.