LTC3807IFE#PBF

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The LTC3807IFE#PBF is a DC/DC switching controller specifically designed for Flyback, SEPIC and Forward topologies. The LTC3807IFE#PBF is part of the PMIC (Power Management IC) family of Voltage Regulators and DC/DC Switching Controllers. It provides a high efficiency, low-noise, and low ripple solution for power conversion applications which require higher output current.

The LTC3807IFE#PBF is equipped with a voltage mode control system, PWM dimming control, cycle-by-cycle overcurrent protection, fault delay and auto-restart protection. All of these features make it an excellent choice for a number of applications, such as LED drivers and automotive power supplies.

In terms of output power, the system can deliver up to 5A continuous currents, with an adjustable standby current of up to 200mA. Its switching frequency can be adjusted to trade-off between efficiency and light-load ripple noise. It also features a fast turn-off delay.

The LTC3807IFE#PBF’s main component is a control circuit that drives an external Mosfet switch. This control circuit includes an oscillator, a voltage loop control circuit, an overcurrent protection circuit, a dimming circuit and a fault delay circuit. The oscillator generates a PWM waveform, which is the input of the power loop control circuit. The power loop adjusts the duty cycle of the PWM waveform to maintain the output voltage. The output voltage feedback is compared with the reference voltage by the voltage loop control circuit. The detected error voltage is used to adjust the input duty cycle accordingly. The over-current protection circuit compares the output current with an adjustable peak value. When the current exceeds the peak setting, the controller will immediately shut off the Mosfet switch to protect the circuit.

The LTC3807IFE#PBF also features temperature protection, a dimming circuit and selectable current limits. The dimming control is designed to adjust the output voltage level by controlling the peak current of the power loop control. The user can select the peak current to allow a small ripple to pass through the circuit. This provides a clean and steady dimming effect. The selectable current limits can be adjusted by adjusting the current peak setting and by setting the overcurrent protection level.

The LTC3807IFE#PBF is suitable for applications that require high efficiency, light-load ripple noise performance and dimming control. The device is very easy to use and can be programmed with a variety of parameters to increase the accuracy of the output voltage or adjust the performance of the circuit. In summary, the LTC3807IFE#PBF is an ideal choice for high efficiency, low-noise, and low ripple DC/DC switching controller applications.

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