MCP19125T-E/MQ

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The MCP19125T-E/MQ is part of a family of silent offline switchers integrated circuits (ICs); they are part of the Primary Mains ICs (PMIC) family, which are intended to control and regulate power levels in devices such as appliances, automotive and consumer electronics. More specifically, the MCP19125T-E/MQ belongs to the Voltage Regulators: DC DC Switching Controllers group.DC DC controllers are used to convert a given input voltage, into the desired output voltage, by means of Pulse Width Modulation (PWM) techniques, achieving energy saving and greater reliability and efficiency. The MCP19125T-E/MQ integrates a high voltage and low power startup circuit, a hysteretic PWM voltage regulator control, an oscillator control and protection functions. The Input Voltage can range from 7V to 25V and is optimized to support universal AC line powered applications. The MCP19125T-E/MQ can replace linear voltage regulators and dc-dc converters, such as LLC resonant and forward converters. The Input voltage is internally regulated to 18V by the high voltage start-up current source.The Output voltage can be regulated over voltage, and current limited function to maintain a safe operation of the device. This feature reduces the stress caused by external components, avoiding the risk of the system being overloaded.The MCP19125T-E/MQ integrates an oscillator control that allows to adjust and select, the switching frequency. The frequency can range from 52KHz to 324KHz, allowing to use the device in various applications, from low power to high power. The oscillator uses an external RC network and an internally selectable soft-start. This reduces the supply inrush current for a better control of the switching cycle.The device also features a Peak Current Mode control architecture, which is set by selecting the resistor values connected to PFC and PWM pins. This mode provides constant current and voltage outputs, reducing the amount of decoupling capacitors needed. The device is also protected against: over temperature, Open Loop, and over Voltage protection.The MCP19125T-E/MQ also features a programmable Sleep Mode, which reduces power consumption while maintaining the device in an active mode. This feature increases the system’s efficiency, reduces the operating costs and improves the device’s performance.In conclusion, the MCP19125T-E/MQ belongs to the Primary Mains ICs (PMIC) family and to the Voltage Regulators: DC DC Switching Controllers group. The device integrates all necessary functions for controlling and regulating power levels, for a wide range of applications. The device offers energy saving, reduced risk of system overload, peak current mode control and protection functions. The MCP19125T-E/MQ is an ideal solution for AC line powered applications that require a regulated output voltage.

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