L5950

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The L5950 is a special purpose Voltage Regulator designed and produced by STMicroelectronics. It provides a very high level of efficiency, robustness and accuracy, making it a popular choice for applications where there needs to be a strict control over the output voltage. In particular, the L5950 is well suited to use in automotive, industrial and consumer applications.

In functional terms, the L5950 is an enhanced voltage regulator, designed to cover a broad input voltage range and deliver an accurate output voltage to an output load. The L5950 uses a PMOS low side driver, which provides an efficient and low-loss power stage for the voltage regulator. This ensures that the output voltage is accurately regulated by the device, regardless of the load and input conditions. The device also includes an input current sensing circuit, which monitors the supply current and provides an indication of overload conditions, which can be used to reduce power consumption.

The L5950 also provides protection against overvoltage, undervoltage, overcurrent, and over temperature conditions. The L5950 is protected against short-circuit, over-current and over-temperature conditions. It also includes input voltage surge protection, and under-voltage and short-circuit lockout. An adjustable switching frequency is another functionality, allowing the device to be configured to match the system requirements.

The main application fields of the L5950 are automotive, industrial and consumer applications. In automotive applications, the L5950 could be used to regulate the subsystems’ power supplies. The L5950 is also suitable for use in battery powered systems, and other industrial applications, where an accurate output voltage is required.

In consumer applications , the L5950 could be used to regulate the supply voltage for a wide range of devices, such as shop displays, refrigerators, and air conditioners. With its wide temperature operating range, the L5950 is also suitable for use in outdoor applications.

The working principle of the L5950 consists of a voltage control circuit, a low-side PMOS driver, and an integrated current sensing circuit. The voltage control circuit controls the gate of the PMOS driver, based on the programmed output voltage of the regulator. The low-side PMOS driver then provides an efficient and low-loss power stage for the voltage regulator, which ensures high accuracy of the output voltage. The integrated current sensing circuit measures the supply current and provides an indication of overload conditions, which can be used to reduce power consumption.

In conclusion, the L5950 is a powerful, reliable and efficient Voltage Regulator and can be used for many different types of applications. Its robust construction, wide temperature range and adjustable switching frequency make it suitable for use in automotive, industrial and consumer applications. It can handle a wide range of input and output voltages and provides an accurate output voltage, even under varying conditions. The integrated current sensing circuit also provides an indication of overload conditions, allowing for efficient power management.

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