BD71801GWL-E2 Integrated Circuits (ICs)

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BD71801GWL-E2 is a device from a family of linear and switching voltage regulators that feature high precision current limit and overload protection. It has a wide working range of 3.2V to 22V, output current up to 30mA, and low quiescent current of 0.5µA typically in standby mode. This product is ideal for use in embedded application and consumer electronics.

Overview

BD71801GWL-E2 is an advanced, low-power, high-efficiency linear/switching voltage regulator, available in a compact 8-PinLLP package. It is designed to provide stable voltage to support an active device, enabling further miniaturization in size. The output voltage can be set between 3V to 20V, with a step-down switching current up to 500mA and adjustable output voltage options. The integrated power factor correction (PFC) circuitry makes it suitable for applications with high power demand. The microcontroller includes high-voltage blocking, programmable soft-start, and adjustable current-limit which provides better system stability and high efficiency. The device is suitable for use in a wide range of applications such as power supplies, automotive systems, PC peripherals, white goods, industrial, health care, and simple logic boards.

Features

BD71801GWL-E2 offers the following features and advantages:

• Wide operation voltage range: 3 to 22V

• High-efficiency linear regulator mode

• Switching mode PFC power supply

• Programmable soft-start

• High-voltage blocking protection

• Integrated low-ESR ceramic output capacitor

• Output current up to 30mA

• Programmable current-limit

• Low quiescent current of 0.5µA

Block Diagram

The BD71801GWL-E2 features the typical linear regulator block diagram. A switching regulator is used for the main power supply, which is then regulated to a desired output voltage using the linear regulator circuitry. This regulator consists of an internal voltage reference, error amplifiers, gate drivers, high-voltage protection MOSFET, and other components for enabling high-efficiency operation. The device has an adjustable current-limit, enabling output current to be limited to the required load current.

Applications

BD71801GWL-E2 is suitable for use in a wide range of applications including power-supply systems, consumer electronics, automotive systems, PC peripherals, white goods, industrial, health care, and simple logic boards. It is also used in applications in which a high power demand is expected while maintaining an efficient power supply. Due to its wide range of input and output voltages, it is suitable for different operating conditions.

Working Principle

BD71801GWL-E2 is based on a linear and switching voltage regulator that utilizes a step-down switching power supply combined with a linear regulator for high-precision current limit and overload protection. The main power supply is set by the external components of the system. This power is then regulated to the desired output voltage using the internal voltage references and error amplifiers. The high-precision current limit is implemented through an adjustable current-limit circuit and programmable soft-start circuitry. The device has a low quiescent current of 0.5µA typically in standby mode, which makes it ideal for low-power applications. The high-voltage protection function is also provided. The integrated power factor correction (PFC) circuitry enables high-efficiency operation.

Conclusion

BD71801GWL-E2 is an advanced low-power, high-efficiency linear and switching voltage regulator. It is designed to provide a stable output voltage and high-precision current limit and overload protection. The device is suitable for a wide range of applications such as power supplies, automotive systems, PC peripherals, white goods, industrial, health care, and simple logic boards. The integrated power factor correction (PFC) circuitry ensures high efficiency and the low quiescent current of 0.5µA typically in standby mode makes it ideal for low-power applications.

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