LM1771UMM/NOPB

The LM1771UMM/NOPB is a Voltage Regulators - DC DC Switching Controllers, which are typically used in high power applications where a wide input voltage range and low output voltage requirements are desired.

Overview

The LM1771UMM/NOPB operates at a voltage range of 5V to 27V and provides adjustable output voltage of 0V to 75V. Using pulse-width modulation (PWM) technology, the LM1771UMM/NOPB can achieve very high efficiency levels up to 96 percent over a wide range of load conditions. The device features a wide input voltage range, flexible output voltage, good line regulation, and accurate current limit. The device also features a temperature management system to ensure the device operates within specified thermal limits by controlling the output current and optimizing the efficiency of the system.

Features

• Wide Input Voltage Range: 5V to 27V
• Adjustable Output Voltage: 0V to 75V
• High Efficiency: Up to 96%
• Wide Load Conditions
• Accurate Current Limit
• Temperature Management

Application Field

The LM1771UMM/NOPB is ideal for a wide range of applications including DC/DC converters, battery chargers, power supplies, DC/AC inverters, and many others. Typical applications include power supply, automotive, and telecom systems.

Working Principle

The LM1771UMM/NOPB is an integrated switching regulator, which contains all of the components necessary to construct a switched mode power supply. It contains an internal PWM (pulse width modulation) oscillator and a driver for the power switch. The PWM modulates the high voltage supply to produce a pulse train, whose width is controlled by the duty cycle of the PWM signal. The driver is responsible for turning on and off the power switch, depending on the duty cycle.

The input voltage is applied to an on-board voltage divider and then fed to a voltage error amplifier. The output of this amplifier is fed to the PWM comparator and then the duty cycle is adjusted automatically according to the voltage setting. The PWM comparator also controls the driver, which turns the power switch on and off.

When the power switch is on, the input voltage is applied to the inductor, which stores energy and transfers it to the output through the diode. When the power switch is off, the reverse voltage at the output is rectified by the diode and the energy stored in the inductor is discharged to the output.

Conclusion

The LM1771UMM/NOPB is a Voltage Regulators - DC DC Switching Controllers, which is versatile and efficient. Its wide input voltage range and adjustable output voltage make it a great choice for high power applications. The device also features a temperature management system, which helps ensure device operation within the specified thermal limits. The LM1771UMM/NOPB is ideal for a wide range of applications, including power supplies, automotive, and telecom systems.