LK112M18TR

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The LK112M18TR is a current-mode Pulse Width Modulation (PWM) controller IC specifically designed for the Auto-Transformer (or Autotransformer) type switched mode power supplies (SMPS) and power factor correction (PFC) converter. This IC is based on an advanced three-phase current mode control architecture, allowing it to provide high performance, high reliability, and high efficiency switching power supplies. The IC also features a wide output voltage range, low output noise and stability.

The LK112M18TR is particularly suitable for use in applications involving multiple output switching power supplies with various output configurations. It is usually used to provide either a positive voltage, negative voltage, or dual positive/negative voltage outputs. The switching frequency is adjustable and the IC can operate at an ultra-low input voltage. It also features a variety of other features and functions, such as protective circuitry, internal soft start, and dynamic brake.

The LK112M18TR is widely used in applications such as computer power supplies, desktop power supplies, and automotive applications. It is also suitable for medical, lighting and audio/video equipment. The IC also features a wide range of built-in protection features, including current limit, thermal shutdown and over-voltage protection.

The working principle of the LK112M18TR is based on a switching PWM control scheme, which involves the use of a comparator circuit to compare the feedback voltage with a reference voltage and then produce a PWM signal. This signal is used to control the switching frequency of the power converter stage. The IC also provides a feedback loop, which is used to ensure that the output voltage remains constant and stable under different loads and varying line conditions. Finally, the PWM signal is amplified and fed to the gate of the main switching transistor, controlling the on/off action of the power switch.

In summary, the LK112M18TR is a current-mode Pulse Width Modulation controller IC designed for the Auto-Transformer (or Autotransformer) type switched mode power supplies (SMPS) and power factor correction (PFC) converters. It offers high performance, high reliability, and high efficiency switching power supplies with a wide output voltage range and low output noise. The IC is widely used in applications such as computer power supplies, desktop power supplies, and automotive applications, as well as medical, lighting and audio/video equipment. The working principle of the LK112M18TR is based on a switching PWM control scheme, involving a comparator circuit and a feedback loop to provide a constant and stable output voltage.

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