LM2577N-12/NOPB

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The LM2577N-12/Nopb is a monolithic step-up switching regulator designed to produce a regulated supply voltage of 12V from a lower voltage source. It is a member of the NOPB Voltage Regulator family. This component is an integrated pulse-width-modulated (PWM) switch-mode regulator, capable of delivering 750mA of continuous load current. It is designed to produce a single output voltage, but can be configured to a dual output voltage if necessary.

The LM2577N-12/Nopb is an attractive component for projects needing stable, precise supply voltages in the 12V range. It is ideal for applications like lighting circuits, battery chargers, etc. This component is also suitable for powering low-current logic circuits, such as microcontrollers and other devices.

Application Field

The LM2577N-12/Nopb is an integrated pulse-width-modulated (PWM) switch-mode regulator, capable of delivering 750mA of continuous load current. It provides an adjustable output voltage of up to 12V, making it ideal for applications in lighting, battery charging and motor control applications. The PWM output can be used to switch various loads such as MOSFETs, IGBTs, etc., providing high power conversion efficiency. Additionally, it includes short-circuit, thermal and overvoltage protection, making it very suitable for industrial projects.

The LM2577N-12/Nopb is also suitable for powering low-current logic circuits, such as microcontrollers, logic gates, A/D converters and other devices. Its high efficiency and wide operating temperature range make it suitable for a large range of industrial and consumer applications, such as DC power supplies, motor drives, lighting circuits and UPS systems.

Working Principle

The LM2577N-12/Nopb is an integrated monolithic switching regulator, designed to produce an adjustable voltage up to 12V. It operates by converting a low input voltage of 2.5V to 14V and delivering a regulated output voltage of up to 12V. The integrated switch mode controller provides PWM regulation, making it suitable for applications with input voltage fluctuations. It provides thermal, output overvoltage and short-circuit protection, to ensure reliable operation in harsh industrial conditions.

The LM2577N-12/Nopb utilizes a switched-mode topology that regulates the output voltage by actively controlling an on-board internal switch. The inductor and output capacitor filter the PWM waveform, ensuring that the output voltage remains within the specified voltage window. The output voltage is regulated by a feedback network, which compares the output voltage to the reference voltage, and modulates the duty cycle of the internal switch to maintain the output voltage at its specified setpoint. The device is also configured for pulse-skipping mode, ensuring a high efficiency, low noise output.

Conclusion

The LM2577N-12/Nopb is a monolithic switching regulator, designed to produce a regulated supply voltage of 12V from a lower voltage source. It is an ideal component for projects needing stable, precise supply voltages in the 12V range and is suitable for applications such as lighting, battery charging, motor control and low-current logic circuits. It utilizes a switched-mode topology, with a feedback network and PWM regulation, to regulate the output voltage within its given voltage window. This component is also designed with thermal, output overvoltage and short-circuit protection, ensuring reliable operation in harsh industrial environments.

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