MAX8790ETP+T

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Power Management Integrated Circuit (PMIC) is an ever-evolving technology that has become increasingly important in today’s world. LED drivers, as part of PMIC, are one of the devices most widely used for controlling the supply voltage for an LED circuit and for providing an optimal electrical environment for driving LEDs. MAX8790ETP+T is one of the most advanced LED drivers on the market, and is an excellent choice for controlling LED displays. This article will discuss the various application fields and working principle of MAX8790ETP+T.

Application fields

The MAX8790ETP+T is an advanced mixed-mode synchronous step-down regulator, that features integrated high-voltage power MOSFETs, high switching frequency and high efficiency. As a result, it is designed for a variety of portable battery-operated applications and power architectures requiring low power dissipation. These include but are not limited to flashlights, portable radiometers, warning beacons and billboards.

The MAX8790ETP+T is particularly well-suited for powering multiple LEDs. It provides precision current control with low current ripple, which reduces power loss in LEDs and extends battery life. In addition, the device is RoHS compliant and halogen free, making it ideal for applications that require high power and increased system safety.

Working principle

The MAX8790ETP+T is an advanced regulator featuring multiple operating modes to provide high efficiency and flexibility for battery-powered designs. It features a step-down topology, allowing for low current ripple and excellent accuracy. In addition, its integrated high-voltage power MOSFETs reduce the need for external components. The device offers fast transient performance, excellent load regulation and is easily programmable with a single resistor.

The main operating mode of the MAX8790ETP+T is pulse-width modulation control. In this mode, the duty cycle of the switching is proportional to the differential between output voltage and the target voltage. The higher the current demand, the greater the duty cycle, and vice versa. The duty cycle is adjusted according to the output voltage to maintain a steady and efficient current flow, thus providing uniform brightness and increased efficiency.

The device also offers a quasistatic operating mode, which reduces power consumption in low-load applications. This feature reduces average current consumption during periods of low-load conditions. During this mode, frequency and duty cycle are controlled automatically to maintain peak efficiency.

The MAX8790ETP+T also features an adjustable ripple control that allows for precise current control and minimizing ripple effects. This feature further stabilizes the current output and provides better system safety.

Conclusion

The MAX8790ETP+T is a versatile LED driver that is suitable for a wide variety of applications. It features integrated high-voltage power MOSFETs, high switching frequency, and low current ripple, allowing for precision current control and improved system efficiency. Its adjustable ripple control and fast transient response further enhance the efficiency of the device, making it an ideal choice for controlling LED displays.

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