STCMB1TR Integrated Circuits (ICs)

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Power factor correction (PFC) can be defined as a process of adjusting the voltage, current, and frequency of an electrical circuit to maximum efficiency and power output. It is the process of controlling the input current and output voltage of an electrical system to reduce power fluctuations and increase efficiency. Many industries rely on PFC in order to regulate power, reduce line losses and increase efficiency.

STCMB1TR is a leading PFC IC specifically designed for AC-DC power supply applications such as mobile phone chargers, battery monitors, adapter chargers and solar systems. STCMB1TR is based off a multi-mode offline power factor controller (PFC) integrated circuit, which reduces system cost and operating temperature. This PFC IC provides high accuracy power factor correction, power factor range selection and total harmonic distortion (THD) circuit. It also features an integration of line voltage and frequency detection and various protection features.

The STCMB1TR can provide up to 99.4% power factor correction rating and support various power systems from 65VAC to 305VAC. It integrates an integrated digital control loop based on a sigma-delta modulation scheme to provide high accuracy voltage control and reduced system risk. In addition, its protection features include line under and over-voltage protection, line frequency protection, and a comprehensive fault checking mechanism.

The STCMB1TR has a wide range of applications, such as LED lighting, telecom, UL/EN compliant applications, consumer electronics, motor control, photovoltaic and automotive power systems. It is a low cost and high efficiency PFC controller that can help customers reduce their system size, cost, and power consumption. The STCMB1TR is a single-chip solution that enables customers to gain significant cost savings in their system design.

STCMB1TR works with a pair of active components, such as a MOSFET and an auxiliary winding together with the DSP + PFC core in the same chip. It uses a sigma-delta-modulation scheme to regulate the current, energy and voltage in compliance with EcoDesign regulations. In order to ensure high system reliability, the IC monitors dissipated energy and voltage. When the dissipated energy reaches its maximum value, the IC reduces the output current by reducing the PWM duty cycle.

The STCMB1TR enables the power system to be operated with a constant voltage and frequency in order to reduce the distortion of the input current waveform. It also enables the system to be operated in a single-phase mode to reduce parts count, cost and system size. Furthermore, it also achieves high power factor and high efficiency at low-load operations, meeting the EcoDesign directive requirements.

Overall, STCMB1TR is a low cost and high efficiency PFC controller IC ideal for AC-DC power supply applications. It provides high accuracy power factor correction, wide range voltage input, and comprehensive fault checking mechanisms. It can reduce system cost, operating temperature and parts count, while meeting the power factor requirements for various power systems.

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