LM2577S-12/NOPB

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LM2577S-12/NOPB is a voltage regulator IC from Texas Instruments off-the-shelf family of DC/DC switching regulators. With a wide, 8V to 36V range of operating input voltages, the LM2577S is well-suited for use in high-current power applications, such as PC systems, embedded CPUs and PLCs, automotive and battery-powered systems, communications, and networking. This highly efficient, monolithic design offers enhanced overload protection and simple, fixed frequency pulse-width modulation (PWM) control.

Application Field

The LM2577S is designed to provide an adjustable output voltage from a range of 2.5V to 37V with a maximum output current of 3A. It is ideal for both powering standard loads, such as routers, switches and other digital electronics, or for more demanding motor and power control applications. In addition, the output voltage can be adjusted via an external resistor for fine-tuning the output voltage levels required for different applications.

The LM2577S is well-suited for powering microprocessors, such as FPGAs, CPUs, and ASICs, as well as battery-powered communications, automotive, and robotics applications. As it is designed to operate across a wide range of input voltage, the LM2577S is also an excellent choice for powering applications requiring a wide range of input voltages. This makes the LM2577S an ideal choice for applications such as DC/DC converters and AC/DC converters that often require wide input ranges.

Working Principle

The LM2577S-12/NOPB works by providing an adjustable output voltage from a wide 8V to 36V range of operating input voltages. This is achieved by using a high-efficiency step-down switching regulator with a phase-shift, pulse-width modulation (PWM) control. The output voltage level is continuously regulated by a fixed frequency oscillator, which ensures a constant output voltage, regardless of input voltage or output current. An internal error amplifier is used to minimize the output voltage drop caused by a load change, thus enabling the LM2577S-12 to provide a stable output voltage.

The device also integrates a wide range of protection features, including over-voltage, over-current and thermal protection. Additionally, the adjustment pin allows the user to adjust the output voltage by simply changing its resistance setting, without the need for external components. This feature allows the LM2577S to provide stable output voltage levels over a wide range of input voltages and output loads.

In summary, the LM2577S-12/NOPB is an efficient, compact, high power DC/DC switching regulator, ideal for powering a wide range of standard and demanding motor and power control applications. It provides an adjustable output voltage from a wide 8V to 36V range of operating input voltages, with a maximum output current of 3A, and provides enhanced overload protection and simple, fixed frequency pulse-width modulation (PWM) control. The LM2577S-12/NOPB is also equipped with a range of protection features for added safety and reliability, and provides stable output voltage levels over a wide range of input voltages and output loads.

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