EQC1241QI

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EQC1241QI Application Field and Working Principle

EQC1241QI, a DC-DC switching regulator, is a multifunctional energy-saving integrated circuit utilizing advanced CMOS/BioCMOSprocess technology. It is designed to utilize step-up, step-down, and step-up/step-down conversion in applications with complex power system design. EQC1241QI belongs to PMIC (Power Management Iintegrated Circuit), grouping of voltage regulators and DC-DC switching regulators. The application field of this multi-functional transfer function IC includes the regulation of supply voltage for microcontrollers, digital signal processor, battery Monitoring, and other single-supply logic circuits.

Small Size & High Power

The size of EQC1241QI conviently fits in small applications because of its tiny circuit size and its pin pitch, which is the smallest among its kind. Users can design an extraordinary power efficiency solution with larger power range from 1W to 60W with over 90% efficiency. It supports to operate in buck/boost, buck/flyback, buck/crossover, and buck/flyback/crossover modes for device integration and greatly simplifies the system design.

Advanced Features

EQC1241QI integrates a variety of functions, including soft-start, pulse-width modulation (PWM) ,DC-DC synchronous rectifier, frequency synchronization and over current protection features, all of which can be used to provide safe and reliable power supply. It also integrates a temperature protection and precision hysteresis which can be used to minimize output voltage ripple and maximum oscillation frequency. A safe and environment friendly built-in OVP circuit provides over-voltage protection as well as possessing an automatic self recovery after over voltage.

Working Principle

EQC1241QI working principally is based on step-up/step-down switching regulator technique. It consists of an inductor, an upper FET (mode switch), a rectifier, an under FET (synchronous rectifier), a periodically modulated pulse-width modulation (PWM) circuit and a power low switch. Its input voltage can range from 3V to 36V and its output voltage from 1.8V to 40V, which is adjustable. The power output is determined by pulse width modulation (PWM) of the mode switch. During top or off state the inductor is charged or discharged. Further, its output voltage is controlled by the PWM circuit to maintain the output voltage of the system.

Conclusion

EQC1241QI is a DC-DC step-up/step-down switching regulator integrated circuit featuring wide input and output voltage range, small size and high power. With integrated features like Soft start, PWM and DC-DC synchronous rectifier, overcurrent protection and temperature protection, it can be used for providing safe and reliable operation for applications such as single-supply logic circuits, microcontrollers, digital signal processors and battery Monitoring. Its working principle is based on periodic pulse-width modulation (PWM).

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