LTC3850IGN-2#TRPBF

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The LTC3850IGN-2#TRPBF is a high performance DC/DC buck switching controller with integrated power FETs, which is suitable for off-line and DC/DC applications. It is designed for cost-effective and high-efficiency circuits up to 15A. This integrated power FET technology reduces the number of external components and provides excellent load and line regulation. Compared with conventional circuit solutions, the LTC3850IGN-2#TRPBF switching controller can reduce the cost and size of the system, while still achieving high efficiency and good dynamic performance.

Application Field

The LTC3850IGN-2#TRPBF switching controller is mainly used in consumer, industrial and communication equipment. It is suitable for applications such as notebooks, PCs, ATX supplies, LCD monitors, LED lighting and household appliances. It can also be used in battery-powered systems, including field-effect transistor controllers, digital-audio power amplifiers and other applications requiring wide input operation. It is suitable for 12V and 24V input voltage product design and includes dual open circuit protection, output over-voltage protection and programmable ADJ current limit.

Working Principle

Working principle of the LTC3850IGN-2#TRPBF switching controller is based on the working principle of Buck and boost DC/DC converters. Generally, Buck converters reduce the input voltage to a lower output voltage; while Boost converters raise the input voltage to a higher output voltage. The required of power can be provided in either polarity and with or without any shift in voltage level.

The LTC3850IGN-2#TRPBF switching controller is based on a fixed-frequency PWM architecture which uses internal slope compensation and a high bandwidth, current-mode system for excellent cross-over distortion. This switching controller can operate in either a buck or boost configuration, and the switching frequency can be programmed from 300 kHz to 2 MHz with the onboard resistor. To maximize efficiency the switching controller also features PFM mode operation.

The LTC3850IGN-2#TRPBF DC/DC switching controller uses high side and low side synchronous MOSFETs as the energy transfer elements. The disadvantages of the high voltage drop of the load and the complex anti-resonance circuits are eliminated. The fast turn-on and turn-off of the MOSFETs allows high frequency operation and small inductor size. The device also includes over-voltage protection, adjustable current limit and two open-circuit protection.

In short, the LTC3850IGN-2#TRPBF DC/DC switching controller is an efficient and reliable power management device for a variety of applications. It is easy to use, with wide input voltage range and adjustable output voltage, as well as provide system protection features including over-voltage, adjustable current limit and open circuit protection. The working principle exploits the synchronous MOSFETs energy transfer element, eliminating the disadvantages of high output voltage drop and anti-resonance circuits.

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