LM25117PSQE/NOPB Integrated Circuits (ICs)

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

LM25117PSQE/NOPB Application Field and Working Principle

The LM25117 PSQE/NOPB is a voltage regulator device belonging to the family of DC DC switching controllers or switching regulators. This device can be used to control the current and voltage in a power supply circuit or power-conversion system.

LM25117 operates by switching currents at high frequencies. It has a built-in power module consisting of power MOSFETs which are used to switch currents and generate the required output voltages. In addition, it has integrated MOSFET drivers which control the MOSFETs used in the power module.

The LM25117 includes an adaptive frequency control feature that adjusts the switching frequency to a maximum of 500kHz and provide oscillator synchronization for multiphase applications. It also features a high-side gate driver which allows for power MOSFET paralleling and current sharing. This feature also helps in reducing the RDS(on) of the power MOSFETs used in the power module and thus improves efficiency.

The LM25117 can be used in a wide range of applications, such as notebook computer power supplies, desktop and server power supplies, battery chargers, DC motor speed control, motor starters, and HVAC systems.

In addition, the LM25117 can be used as a high-frequency pre-regulator stage in high power supplies and industrial power systems. It can also be used in off-line or battery-operated equipment, such as portable and handheld devices as it supports both low quiescent current and low no load power consumption.

How Does the LM25117 Work?

The LM25117 consists of a power MOSFET driver and a synchronous rectifier driver. It operates with a switching frequency of up to 500kHz and has a wide operating voltage range of 8V to 65V. The synchronous rectifier driver generates the required output voltages by switching the power MOSFETs at high frequencies. The LM25117 also features a high-side gate driver, which enables power MOSFET paralleling and current sharing. The power MOSFET paralleling improves efficiency while the current sharing prevents the output voltage from drooping, due to an increase in the load.

The device monitors the current in the power-conversion system and adjusts the switching frequency in order to maintain the output voltage and current at the desired levels. It also has an external voltage feedback pin which can be used to adjust the output voltage in order to maintain a constant voltage. The external voltage feedback pin can also be used to set the current limit of the device.

The LM25117 also features an external synchronization capability which allows for the output voltage to be synchronized with an external clock. This allows for the device to be used in multiphase applications. The device provides overload protection and thermal protection, which ensure safe and reliable operation.

Conclusion

The LM25117 is a voltage regulator device belonging to the family of DC DC switching controllers or switching regulators. It can be used to control the current and voltage in a power supply circuit or power-conversion system. The device has a wide range of applications, such as notebook computer power supplies, desktop and server power supplies, battery chargers, DC motor speed control, motor starters, and HVAC systems. The LM25117 can be used as a high-frequency pre-regulator stage in high power supplies and industrial power systems. The device operates by switching currents at high frequencies, and can be easily adjusted with external voltage feedback pins. In addition, the device has an external synchronization capability which allows for the output voltage to be synchronized with an external clock. The LM25117 offers a reliable and efficient solution for voltage regulation.

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