LTC3816IFE#TRPBF

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LTC3816IFE#TRPBF Application Field and Working Principle

The Linear Technology Corporation’s LTC3816IFE#TRPBF is a non-synchronous buck-boost switching regulator integrated circuit (IC). The device is specifically designed to convert the input voltage at a given VIN, within a 5.5V to 28V range, into an output voltage adjustable between 0.6V and 28V. This is done through Pulse Width Modulation (PWM) with 100kHz switching frequency, yielding a fixed 1000mA current output.

Overview of LTC3816IFE#TRPBF

In terms of output stages, the LTC3816IFE#TRPBF uses two 4A current limited P-type FETs for driving the buck mode operation and two 4A current limit N-type FETs for its boost mode operation, each of which can provide up to 60V of total output voltage. It also includes an on-chip power transistor, which includes an integrated Sense FET, to adjust the voltage based on a potentiometer. Furthermore, LTC3816IFE#TRPBF also features a Power Good Flag (PGF) output indicator which provides an indication of the output voltage status. PGF will be high if the output voltage exceeds its nominal setpoint, and low if the output voltage is below its range.

Working Principle

The LTC3816IFE#TRPBF works on the basic principle of boost and buck. In a buck, the input DC voltage is reduced to a lower level at the output. On the other hand, in the boost mode, the output voltage is increased from the input from its battery or power supply. It works by switching the input voltage from ground to VIN, and then to its output in a consecutive pattern. Under this arrangement, the ON time of the output stage FETs determines the feedback voltage and influences the output voltage. This helps in regulating the output voltage and hence reduces the ripple at the output.

The LTC3816IFE#TRPBF features an on-chip power transistor, an integrated Sense FET and a Power Good Flag output indicator. The power and Sense FETs help to adjust the output. By using a potentiometer, the output voltage setpoint can be adjusted accordingly. The Power Good Flag output indicates the output status, and it will be low in case the output voltage is below its range and high when it is higher than the nominal setpoint.

Applications

The most common applications of LTC3816IFE#TRPBF are in DC-DC converters and in other applications that require the conversion of input voltage from 1.8V to 28V. It can be used in the automotive industry for driving high-current devices at 12V, such as automotive lighting systems, DVD systems and rear view cameras. It can also be used in portable computers and cell phones as a battery charger, as well as in LED lighting systems. Furthermore, it is also suitable for industrial applications, such as solar controllers and factory automation.

Given its versatility, the LTC3816IFE#TRPBF finds several uses in different fields. It is an excellent solution for the day-to-day needs and is the ideal choice for professional designers looking to get the most out of their solutions.

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