L9348

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power management integrated circuits (PMICs) are a type of semiconductor device that finds wide application in many types of electronic devices. One particular device designed for the power management sector is the L9348 power distribution switch, a load driver device from STMicroelectronics. It performs a number of functions in various types of applications, helping to control and manage power flow within electronic systems. In this article, we will explore the application field and working principles of the L9348.

The L9348 power distribution switch is a load driver device designed to control the power flow in an electronic system. It is an integrated circuit consisting of two independent N-channel high-side power MOSFETs which can be used as a single switch in whichever application it is used. The L9348 has an on-chip thermal protection and current-sense protection, and its operating voltage range is from 4 V to 42 V.

The L9348 is ideal for applications requiring power management and electrical load sharing between different components within a system, such as industrial robots and electric motors. It can also be used in automotive applications to control the power flow between HV batteries and other system components. The device is capable of switching loads with currents up to 7.5 A and a maximum peak current of 10 A.

The L9348 operates in two modes: pulse-width modulation (PWM) mode and pulse-frequency modulation (PFM) mode. In PWM mode, the power distribution switch uses internal PWM logic to regulate the output voltage in order to achieve high efficiency of the power supply. In PFM mode, the device employs a pulse-frequency modulation scheme to adjust the duty cycle in order to maintain stability of the power supply.

The working of the L9348 is based on the use of a high-side power MOSFET as the main power distribution switch. This switch is used to control the current flow between the input and the output of the device. When the device is in PWM mode, the power MOSFET is turned on and off at a frequency determined by the logic circuit inside the device. During each cycle, the time that the MOSFET is on is determined by the duty cycle of the PWM signal, while the time it is off is determined by the frequency of the signal. In PFM mode, the duty cycle of the signal is adjusted by the device according to changes in the load current.

In addition to its power management capabilities, the L9348 is also capable of providing precise over-current protection. This is achieved using a current-sense amplifier integrated on the device. The amplifier amplifies the voltage drop across an external resistor connected in series with the output. This voltage is compared with a set reference voltage set by the user to detect any overloads or short circuits in the system.

The L9348 is a versatile device designed for a wide range of power management applications. Its two operating modes, PWM and PFM, make it well-suited for systems where precise control of power flow is required, while its integrated current-sense amplifier and on-chip thermal protection ensure reliable operation of the device. With its high operating voltage range, it is ideal for use in a variety of industrial, automotive, and other applications.

The specific data is subject to PDF, and the above content is for reference