LM1771SSD/NOPB

The LM1771SSD/NOPB is a type of PMIC device that has the ability to control a DC output voltage from an input voltage source. It is a current mode controller designed for operating in switch mode power supplies and has the potential to deliver substantial savings in time, cost and size by providing a miniature, cost-effective alternative to traditional voltage regulator methods. The LM1771SSD/NOPB application field is suitable for any application or product requiring a DC output voltage that either maintains a controlled voltage or maintains a fixed output power.

The working principle of the LM1771SSD/NOPB DC DC switching controller is to take an input voltage source and convert it into a fixed output voltage. It accomplishes this by using a control loop which regulates the output of the power supply. The power regulation mode of the device is determined by an external resistor connected to the feedback pin. The output regulation is either Voltage mode or Current mode.

In Voltage mode, an external resistor is configured such that the output voltage is kept at a constant voltage as determined by the resistor. The LM1771SSD/NOPB maintains the voltage output by regulating the average current through the coupled inductor. As the output voltage is maintained, the current is adjusted on a cycle by cycle basis.

In the Current mode, an external resistor is configured such that the output current is maintained as determined by the resistor. The LM1771SSD/NOPB maintains the current output by regulating the voltage across the inductor as the current varies. The voltage is maintained by adjusting the voltage on a cycle by cycle basis.

The LM1771SSD/NOPB DC DC switching controller features many additional features, including adjustable frequency operation, current limit capability, programmable dead time, and on-chip power good signal. The device also includes an adjustable output voltage, programmable under-voltage lockout and open loop voltage feed-forward, and an on-chip temperature monitor with integrated protection and fault reporting.

Overall, the LM1771SSD/NOPB DC DC switching controller provides an efficient way to convert an input voltage source into a fixed output voltage. The device is suitable for many applications and products requiring accurate output voltage regulation and should be considered in the design of a switch mode power supply. Its many features and advantages make it an ideal choice for a miniature and cost-effective solution for maintaining output voltage, power and current requirements.