IPS1041LPBF

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IPS1041LPBF Application Field and Working Principle

IPS1041LPBF is a power distribution switch, load driver and power management integrated circuit (PMIC) developed by International Rectifier. It is designed to provide system-level power management in a variety of mobile computing applications.

The IPS1041LPBF employs an advanced, four-channel Buck-boost switch controller that provides up to 40 mΩ on/off resistance over an input voltage range of 2.0 V to 46.0 V. It also employs an advanced, two-channel, low-side PFET load driver that supports up to 6 P-channel PFETs in parallel, supporting a wide range of output currents. The IC’s power distribution architecture combined with its advanced switching technology provide superior performance, enabling the device to be used in a variety of mobile computing applications.

The IPS1041LPBF also provides advanced load protection features including over-current and short circuit protection, as well as open load condition detection and latching fault protection. In addition, it features programmable loop response for improved transient response and closed-loop feedback for enhanced load current accuracy.

The IPS1041LPBF features an adjustable switching frequency from 100 kHz to 1.1 MHz, with an internal oscillator providing a frequency accuracy of ±2%. It also offers four different operating modes including Buck-Boost, Pulse-Skip, Forced PWM, and Forced Pulse-Skip, along with an adjustable current sharing capability. With all these features and more, the IPS1041LPBF is able to meet the most demanding system requirements.

In terms of its working principle, the IPS1041LPBF controls two independent variable voltage and current sources. Every variable current source (VM) is driven by a separate phase-shifting switch. The phase-shifting switches alternately switch off and on when the central switching and phase-shifting clock (CSPC) is applied and this generates the variable output voltage. The angles of the CSPC are adjusted thus allowing the phase-shifting switches to control the voltage and current of the VM.

The PFM control loop is also employed to optimize the power efficiency by switching on/off different phase-shifting switches at the given frequency by adjusting the duty cycle of the CSPC. This ensures that the output voltage and load current remain constant, even when the load conditions vary. The current sharing capability of the IPS1041LPBF can also be programmed to improve the performance of the system under various load conditions.

Overall, the IPS1041LPBF is a highly efficient, flexible and reliable power management integrated circuit that has been specifically designed for mobile computing applications. Its advanced control loop and high reliability ensure superior performance and make it an ideal choice for a variety of applications.

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