LM5027SQX/NOPB

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The LM5027SQX/NOPB is a highly integrated, monolithic, synchronous buck-boost switching controller specifically designed to operate over a wide input voltage range in applications requiring both step-up/down converter and isolated inverter operations. With an input voltage range of 2.5V to 54V, the LM5027SQX/NOPB can be used in various designs such as point-of-load converters, LED drivers, DC to AC converters, and DC to DC converters. The synchronous buck-boost operation of the LM5027SQX/NOPB allows it to maintain operation even in cross-over zones, so it can accept a wide range of input voltages without the need for external voltage level-shifters or level-adjustment signals. This makes it an ideal choice for applications that require a wide input voltage range, such as automotive and industrial applications.

In order to get the best performance and efficiency from the LM5027SQX/NOPB, it is important to understand how it works. The LM5027SQX/NOPB synchronous buck-boost controller employs a fixed frequency, valley current mode architecture to ensure stable operation over a wide input voltage range. The signal of the control loop is formed by a valley current signal, which is based on the ripple current in the inductor and the feedback signal generated by the external error amplifier. With this architecture, the controller is able to provide a stable output voltage and efficient operation over a wide input voltage range. The LM5027SQX/NOPB uses a wide frequency range of 350kHz to 4.5MHz, which allows for optimal efficiency for both step-up and step-down conversion. The output voltage range is adjustable over a 2.5V to 40V range.

The LM5027SQX/NOPB also offers a variety of protection features. The device offers over-voltage protection, under-voltage lockout, over-temperature protection, short circuit protection, and over-current protection. It also features an internal watchdog timer, which will reset the device if an over-current protection fault occurs. The over-current protection feature detects both the voltage and current in the output and will shut down the device if either reaches a predetermined limit. The over-temperature protection feature will shut down the device if the die temperature exceeds a safe level.

The LM5027SQX/NOPB is a highly integrated, monolithic synchronous buck-boost switching controller that is capable of handling a wide input voltage range. It is well-suited for applications requiring both step-up/down converter and isolated inverter operations. Thanks to its wide operating frequency range and adjustable output voltage range, the LM5027SQX/NOPB offers high efficiency and reliability. Additionally, its wide array of protection features make it a safe and reliable choice for many designs.

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