STR-L451

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STR-L451 Application Field and Working Principle

The STR-L451 IC is a high performance offline Switcher IC. It is a step down converter that is compatible with low cost AC-DC power supplies. It consists of an internally compensated DC to DC converter, boosting its efficiency to a great extent. This IC has been designed to meet the requirements of various home entertainment equipment, with its standby power consumption being extremely low.

The wide input voltage range of the STR-L451 (from 8V to 50V) allows it to be used in a wide range of applications. Moreover, it also supports a wide output voltage range, making it suitable for a wide range of power requirements. The STR-L451 is highly efficient, up to 98% efficiency, thanks to the field-programmable over-current protection feature.

The STR-L451 offers constant switched frequency operation, making it suitable for high performance applications. It also supports Pulse Frequency Modulation (PFM) to reduce power consumption further and to improve as well as maintain efficiency even at light loads. Further, it includes fixed frequency over current protection, with cycle-by-cycle current limitation.

The STR-L451 IC is a very power efficient design and is capable of delivering power at up to 5A output. Furthermore, it also has a built-in demagnetization circuit that prevents overshoot and overvoltage during start-up and short-circuit protection. Additionally, it features an extremely low standby current, making it suitable for application in green power solutions that require minimal power consumption. The device also features under voltage detection for protection against short-circuit and/or low load conditions.

In terms of its structure, the STR-L451 is designed such that it consists of three main components - an integrated MOSFET, a controller and a power factor correction (PFC) circuit. The MOSFET is the main component of the IC and the controller is responsible for controlling the MOSFET and maintaining the output voltage and current. The PFC circuit is used to reduce power consumption and to improve efficiency.

In conclusion, the STR-L451 IC is a high performance, power efficient offline switcher IC ideal for use in a wide range of applications. Its wide input voltage range and relatively low power consumption make it suitable for both home entertainment and green power solutions. Further, its efficiency is improved by the integrated PFC circuit and the demagnetization circuit ensures stable operation even when short-circuit protection is activated.

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