LTC1872BES6#TRMPBF

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The LTC1872BES6#TRMPBF is a versatile controller for high efficiency DC-to-DC conversion applications. It combines a high performance operating frequency, wide operating range, wide output cycle-by-cycle current limiting, and low output voltage ripple for maximum flexibility and efficiency. The combination of these features make the LTC1872BES6#TRMPBF suitable for a wide range of applications including automotive, industrial, white goods and consumer power supplies. The device is available in 8-lead MSOP package.

Application Field of LTC1872BES6#TRMPBF

The LTC1872BES6#TRMPBF is designed to be used in high efficiency, high power DC-to-DC switching applications. Some typical applications of the device include:

• Buck/Boost converters
• Forward/Flyback converters
• High current/High voltage auxiliary converters
• Polarity converters
• DC-DC converters

The device has a wide input voltage range of 2.7V to 20V and is well suited for automotive applications that require a safe operation under load and high efficiency. It has a wide output current limit range of 0.25A to 10A and is a suitable device for large load requirements in consumer and industrial applications. The operational frequency is adjustable from 10 kHz to 750 kHz and requires an external frequency setting resistor (Rset). The device also features cycle-by-cycle current limit to ensure safe operation even at the highest loads.

Working Principle of LTC1872BES6#TRMPBF

The LTC1872BES6#TRMPBF works by controlling the flow of current through the converter based on the input and output voltages and current. The device monitors the input and output voltages, and adjusts the duty cycle of the switch according to the desired voltage. When the output voltage reaches the set point, the device automatically adjusts the duty cycle to maintain the output voltage.

The cycle-by-cycle current limiting feature of the LTC1872BES6#TRMPBF provides protection against a short circuit or overload conditions. The device monitors the output current, and if the current exceeds the set limit, the device shuts off the main switch and prevents further current flow. This feature is particularly useful in applications with long cable runs, as it offers protection against any damage caused by a short circuit or overload condition at the end of the cable.

The device has two over-voltage protection (OVP) pins, labeledOUT1 andOUT2, which can be used to protect against over-voltage conditions. The OVP pins can be set to the desired trip points for both output voltages. This allows for better protection for the application in case of over-voltage conditions.

The LTC1872BES6#TRMPBF also features on-board over-temperature protection. The device monitors the die temperature of the device and shuts off the main switch if the temperature reaches the set trip point. This ensures the device is protected against overheating.

Conclusion

The LTC1872BES6#TRMPBF is a versatile and high performance device that is suitable for a wide range of applications requiring reliable and efficient DC-to-DC conversion. It combines a wide range of features such as adjustable operating frequency, wide output current limit, and low output voltage ripple. The device has protection against load, over-voltage and over-temperature conditions that makes it suitable for automotive and industrial applications.

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