LTC1439IGW#TRPBF

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The LTC1439IGW#TRPBF is an IC manufactured by Linear Technology Corporation, and falls under the heading of DC DC Switching Controllers within their Voltage Regulator range of PMIC (Power Management IC) products. This IC functions as a pulse-width-modulated (PWM) controller for high-performance, high-efficiency off-line switch-mode power supplies. It eliminates all of the complicated design calculations and external components associated with traditional PWM controllers and supplies highly optimized, high performance control with minimal external components. The use of this IC can simplify the design of high-efficiency power supplies by eliminating the need for complex calculations and external components.

The LTC1439IGW#TRPBF is suitable for applications requiring output currents up to 10A. It offers many features, including an ultra-low standby power consumption, current mode control for excellent line and load regulation, an adjustable-frequency foldback current limit for increased system reliability and safety, and a wide range of fault protection features. It also incorporates a logic-level shutdown command, a high-efficiency start-up circuit to minimize turn-on surge current and an adjustable soft-start circuit to reduce inrush current. The IC contains an over-voltage protection circuit that prevents output voltages from exceeding an adjustable threshold when a fault occurs. This IC is optimized to operate over a wide input voltage range (4.5V to 5.5V), making it perfect for use in applications such as LCD TV, notebook power supply and external power adapers.

The LTC1439IGW#TRPBF\'s working principle is based on pulse width modulation (PWM), with the core of the IC controlling the current and voltage through modulation of the pulse width of the drive signal. The core\'s modulation range can be adjusted externally, in order to provide precise output voltage control. Additionally, an external frequency adjustment pin lets the user control the switching frequency and harmonic content of the output. The low-side and high-side drives are both high-level logic inputs, allowing for easy connection of digital logic signals. The IC also includes a logic output (TMLT) that can be used to monitor the output current. This output can be used to control other devices, such as switching off cooling fans or LED indicators when the output load is light.

In conclusion, the LTC1439IGW#TRPBF is an integrated pulse width modulation (PWM) control IC for high-efficiency, high current DC-DC switching power supplies. It eliminates the complexity and calculation associated with traditional PWM controllers, allowing for the simple design of reliable, efficient power supplies. The IC is suitable for applications requiring output currents up to 10A and has a wide range of features including adjustable-frequency foldback current limit, an over-voltage protection circuit, low standby power consumption and adjustable soft-start and start-up circuit. The IC is optimized to operate over a wide input voltage range and has high-level logic inputs and outputs for easy connection with digital logic signals.

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