LM2598SX-12/NOPB

Voltage - Output (Min/Fixed):	12V
Base Part Number:	LM2598
Supplier Device Package:	DDPAK/TO-263-7
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	150kHz
Current - Output:	1A
Voltage - Output (Max):	--
Series:	SIMPLE SWITCHER®
Voltage - Input (Max):	40V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LM2598SX-12/NOPB application field and working principle

Introduction

The LM2598SX-12/NOPB regulator is a monolithic, high-efficiency device designed to provide constant voltage and current regulation in a variety of applications. The setup of the LM2598 incorporates a complete new generation of low-loss power switches that can provide higher efficiency than other switching regulators. It operates with frequencies in the range of 100 kHz to 500 kHz and provides flexibility in design. The LM2598 is available in 8-pin, 4-pin, and surface-mount packages, and is rated for a wide input voltage range of 4.5V to 22V, with an adjustable output voltage range of 0.8V to 17V and an output current of 1.5A.

Application

The LM2598SX-12/NOPB is used in many different applications. It is an ideal choice for portable battery operated equipment or other systems operating with a wide input voltage range. It can be used for powering processors, memories, and other logic components in applications including desktop computers, networking equipment, telecom equipment, military/aerospace, and AC-DC and DC-DC applications. Its high switching frequency benefits design in applications as it allows the use of a small form factor inductor and low-cost capacitors. Additionally, it is also used in power supplies, motor control, and battery charging.

Working Principle

The LM2598SX-12/NOPB is a voltage switching regulator that uses a pulse-width-modulated (PWM) control scheme to regulate the output voltage. The PWM control scheme requires an external resistor and capacitor to generate a triangular waveform at the regulator\'s varying frequency. The magnitude of the voltage is dictated by the values of the resistor and capacitor. The regulator has a power switch which is driven by two control signals: one from the oscillator and one from a transconductance error amplifier.The oscillator signal, depending on its frequency, is used to generate the control signal for the power switch. When the power switch is on, the inductor current increases; when the power switch is off, the inductor current decreases. The duty cycle of the oscillator signal determines the current in the inductor and the output voltage. The error amplifier compares the reference voltage with the feedback voltage from the output. Its output is then used to adjust the duty cycle of the oscillator signal to keep the output voltage in regulation.

Conclusion

The LM2598SX-12/NOPB is a versatile switching regulator that provides high efficiency and flexibility in design. It is used in various applications requiring a wide input voltage range, powering logic components, and energy conversion. Its PWM control scheme requires an external resistor and capacitor, along with signals from an oscillator and a transconductance error amplifier, to adjust the duty cycle of the power switch and keep the output voltage in regulation. With its high efficiency and various applications, the LM2598SX-12/NOPB is an ideal choice for modern design.

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