BD9876EFJ-E2

Voltage - Output (Min/Fixed):	1V
Base Part Number:	BD9876
Supplier Device Package:	8-HTSOP-J
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 105°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	300kHz
Current - Output:	3A
Voltage - Output (Max):	29.4V
Series:	--
Voltage - Input (Max):	42V
Voltage - Input (Min):	7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The BD9876EFJ-E2 is a DC-DC switching regulator in the field of power management integrated circuits (PMICs). This type of regulator is used in a wide array of applications, from battery-powered devices to larger power systems. This article will cover the application field and working principle of the BD9876EFJ-E2.

Features and Specifications

The BD9876EFJ-E2 is a synchronous switching regulator with a maximum output power of 40W and a 3A synchronous buck regulator, making it suitable for a variety of power management applications. It has a wide input voltage range of 4.5V to 40V, making it a great choice for space-limited conditions. Additionally, the BD9876EFJ-E2 is highly efficient, reaching up to 95%. Its switching frequency is adjustable up to 500KHz, with a maximum current of 3A, which makes it suitable for high power applications. The adjustable soft-start and adjustable over-temperature protection help ensure the safety and stability of the device in the event of overload and over-temperature conditions.

Application Field

The BD9876EFJ-E2 is an excellent choice for a wide range of applications requiring DC-DC switching regulators due to its high efficiency, driving capability and configurability. It is widely used in consumer, automotive and industrial applications with wide voltage ranges. Additionally, the device can be used in applications such as laptops, portable devices, gaming systems, automotive systems and metering systems. In consumer electronics, the BD9876EFJ-E2 has various applications in the field of ready-to-use products such as gaming systems and portable devices, as well as products that require low current and high-efficiency solutions, like TV sets, monitors, and cell phone chargers. In automotive applications, the BD9876EFJ-E2 can be used in LED headlights, as well as in car audio systems, sunroof motors, and power steering systems. It also provides solutions for electrically driven powertrain components like ignition coils and fuel pumps. In industrial applications, the BD9876EFJ-E2 can be used for adjustable constant current sources, robots, and automation systems. Additionally, it can be used for transportation, train, and marine navigation systems due to its high efficiency, small size, and ease of configuration.

Working Principle

The working principle of DC-DC switching regulators like the BD9876EFJ-E2 is based on the phenomenon of pulse-width modulation (PWM). The regulator works by converting a variable voltage input into a fixed output voltage. This is done by switching a transistor on and off at a very high frequency, which is their adjustable switching frequency. When the transistor is switched on, the current passes through the system and the voltage across is regulated by varying the proportion of time the transistor is kept on, which is known as pulse-width modulation. This principle allows the regulator to quickly adjust the output voltage to match the needs of the system, which helps improve the efficiency of the system significantly. Additionally, the adjustable soft-start and adjustable over-temperature protection of the BD9876EFJ-E2 also helps ensure that the device is safe and stable in operation.

Conclusion

The BD9876EFJ-E2 is an excellent DC-DC switching regulator in the field of PMICs. It is highly efficient, with adjustable switching frequency and adjustable soft-start, making it perfect for power management applications across a wide range of conditions. Its appplication field is diverse, from consumer electronics to automotive and industrial applications. Its working principle is based on the phenomenon of pulse-width modulation, which helps ensure that the device is working safely and efficiently.

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