LTC3723EGN-2#PBF

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LTC3723EGN-2#PBF is a DC/DC switching controller manufactured by Linear Technology. It is categorized under PMIC - Voltage Regulators - DC DC Switching Controllers. It features an internal power MOSFET with a current capacity that can reach a maximum of 4A. It has wide input voltage range from 4.5V to 14V. It also supports wide frequency range, programmable switching frequency up to 1MHz, and adjustable dead time up to 15ns. The LTC3723EGN-2#PBF also has a start-up current limit with foldback current limiting to provide overcurrent protection. It also has a Thermal Shutdown Protection feature that can maintain a constant junction temperature.The primary application field of the LTC3723EGN-2#PBF is to provide power supply and control for power transformers, DC/DC converters, and magnetic amplifiers. It is especially suited for automotive, industrial, medical, and commercial applications. The internal power MOSFET is optimized for delivering power efficiently, with low noise and low RDS(on). With its full protection features and its adjustable parameters, the LTC3723EGN-2#PBF provides efficient and reliable power management for low power and high power applications.The operating principle of the LTC3723EGN-2#PBF is based on the transformer secondaries providing isolated voltage sources. An oscillator generates a clock signal, which is used to drive the gates of the power MOSFETs. This determines the switching frequency and deadtime of the system, which is adjustable up to 1MHz. A voltage slope comparetor monitors the output voltage of the transformer secondary and feeds it back into the PWM comparator, which controls the duty cycle of the power MOSFETs. A current sense amplifier monitors the primary current of the transformer, and an error amplifier adjusts the PWM comparator output to maintain a constant output voltage.The LTC3723EGN-2#PBF features Auto-Restart mode, where it restarts automatically when the output is short-circuited. When the output voltage exceeds 150mV, the Error amplifier drives the PWM comparator to allow the switch to remain on, providing output power. When the output current exceeds the current limit, the current sense amplifier decreases the voltage at the PWM comparator below the voltage thresshold, causing the switch to turn off. The Auto-Restart mode ensures that the controller maintains steady power supply to the load and activates again once the short-circuit is removed.In summary, the LTC3723EGN-2#PBF is a versatile DC/DC switching controller designed to provide power and control for power transformers, DC/DC converters, and magnetic amplifiers. It features an internal power MOSFET optimized for efficient delivery of power with low noise and low RDS(on). It features comprehensive protection features, adjustable parameters, and adjustable frequency and deadtime up to 1MHz. Finally, its Auto-Restart feature ensures that the controller remains functional and reliable in the event of a short-circuit.

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