L9347PD-TR

The power management integrated circuits (PMICs) are paramount in ensuring the stable operation of an electric system by providing efficient energy management. The L9347PD-TR is an advanced PMIC designed for automotive and industrial applications. It contains two load drivers, two open-drain switches, and two load switches, enabling load sharing and system-level power distribution features. This paper discusses the application field and working principle of the L9347PD-TR.

Application field

The L9347PD-TR can be applied as a power distribution switch in fields such as industrial, automotive, and home electrical applications. It is suitable for any system demanding state-of-the-art power management, such as robotics and control systems. The switch is also ideal for powering consumer electronic products and maintaining the system’s stability.

The device is highly suitable for vehicle components such as powertrains and suspensions. It is able to protect the powertrain against shocks and other environmental conditions, while maintaining the system’s stability. The switch also features integrated monitoring features, allowing the driver to observe system voltage parameters and take appropriate action if any abnormal conditions occur.

Working Principle

The L9347PD-TR is a common low side switch, used for both low and high side load switching applications. It features a switching architecture, which allows the driver to switch and monitor the load current, voltage and temperature. The device has two independent load switches, each featuring a voltage source, load current, and load temperature. This allows for load switching across two different sources simultaneously.

The device also contains two open-drain switches, one for each load, allowing for load sharing between the two switches. When the open-drain switch is triggered, the corresponding load is either turned on or off, depending on the application. The weak pull-up on the open-drain switch will compensate for any voltage spikes, ensuring uniform and reliable power delivery.

The switches are further enhanced by integrated protection features, allowing them to safely shut off in the event of any system faults or overload conditions. The device also has a fail-safe mechanism, which will shut down the load switches if the load current exceeds a certain threshold. This ensures stable operation in any conditions and prevents possible electrical, thermal or safety hazards.

In addition, the device features an active power regulation system, which automatically adjusts the power delivery to maintain a constant output voltage as the load conditions change. This ensures a stable output and prevents power fluctuations, protecting the system from any abrupt voltage changes.

The L9347PD-TR is an ideal power management solution for industrial, automotive and home electrical applications. It is a versatile PMIC, featuring two load drivers, two open-drain switches, and two load switches, enabling load sharing and system-level power distribution features. It also features integrated monitoring, overcurrent protection, active power regulation, and a fail-safe mechanism, providing stable power delivery and preventing damage to the system.