NR885E

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NR885E Application Field and Working Principle

The NR885E is a synchronous step-down PMIC (power management IC) DC DC switching regulator with a maximum output power of 8W. The device offers adjustable output voltage regulation and high current efficiency with low-power losses. The NR885E has a wide range of applications and is suitable for digital circuits’ power supply, LCD displays’ power supply, motor drives’ power supply, and consumer electronics. Additionally, the NR885E offers an automatic power-saving mode.

Advantages of the NR885E

• High Efficiency: The NR885E has a high power efficiency, up to 93%. It includes a synchronous boost MOSFET and several features that reduce power dissipation and minimize losses.
• Wide Input Voltage Range: The NR885E offers a wide input voltage range of 4.5-26V. This ensures reliable operation in a crude environment.
• Output Adjustment: The NR885E provides adjustable output voltage regulation, allowing the output to be accurately tuned to the requirements of the application.
• Automatic Power-Saving Mode: The NR885E offers an automatic power-saving mode, which cuts off the current when the voltage drops below a certain point. This helps extend battery life and reduce power consumption.

Working Principle of the NR885E

The NR885E is a synchronous step-down DC DC switching regulator. The device consists of a high-side switch, a low-side driver, and a boost MOSFET. The dutycycle of the boost MOSFET is controlled by the voltage feedback from the output circuit. The dutycycle is proportional to the output voltage.

When the input voltage is higher than the regulated voltage, the high-side switch turns on. This turns on the boost MOSFET, which produces a regulated output voltage. When the input voltage is lower than the regulated voltage, the boost MOSFET turns off and the low-side driver turns on, pulling the output voltage to ground until the voltage feedback exceeds the regulated voltage. This continuous cycle is the working principle of the NR885E.

Conclusion

The NR885E is a synchronous stepdown PMIC DC DC switching regulator with high efficiency, a wide input voltage range, and adjustable output voltage regulation. The NR885E offers excellent performance for applications such as digital circuits’ power supply, LCD displays’ power supply, motor drives’ power supply, and consumer electronics. Additionally, the device offers an automatic power-saving mode, which makes it an ideal choice for battery-powered devices.

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