BD9329AEFJ-E2

Voltage - Output (Min/Fixed):	0.9V
Base Part Number:	BD932*
Supplier Device Package:	8-HTSOP-J
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	380kHz
Current - Output:	3A
Voltage - Output (Max):	12.6V
Series:	--
Voltage - Input (Max):	18V
Voltage - Input (Min):	4.2V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Introduction:

BD9329AEFJ-E2 is a DC-DC switching regulator typically used for supplying power to system components requiring a 5V output from a +18V input. It is part of the BD9329 family of components, and is classified as a PMIC (Power Management Integrated Circuit).

Features:

The BD9329AEFJ-E2 features some of the most important features commonly found in DC-DC converters. First, it has a built-in Switching Enhanced mode, designed to reduce radiated noise and save power. This mode of operation avoids the use of an external MOSFET, and allows the switching frequency to be adjusted. The BD9329AEFJ-E2 is capable of operating with a maximum switching frequency of 1.2 MHz. This can be adjusted to 300 kHz or 600 kHz.The BD9329AEFJ-E2 also includes a wide range of protections, such as over current and over voltage protection, as well as current limitation for improved system stability. In addition, it also provides a high switching efficiency of up to 96%, thus maintaining excellent power conversions.

Applications:

The BD9329AEFJ-E2 is suitable for use in a wide range of applications, including distributed power supply systems, embedded systems, vehicle electronics and telecommunication systems.As the output voltage is 5V, it is ideal for use in systems such as low power and portable computing devices, digital media players, and other electronic systems requiring a reliable 5V power supply.

Working Principle:

The BD9329AEFJ-E2 utilizes a circuit known as a Buck converter, a type of switching regulator. This circuit works by utilizing a MOSFET to switch on and off the current to the load, thus regulating the amount of power being supplied.The BD9329AEFJ-E2 features a wide range of operating modes, including PWM (Pulse Width Modulation) and PFM (Pulse Frequency Modulation). In PWM mode, the MOSFET is turned on and off rapidly, thus maintaining a constant output voltage. In PFM mode, the MOSFET is turned on and off at a lower frequency, thus resulting in a more efficient output voltage regulation.In addition, the BD9329AEFJ-E2 also includes a current limit circuit. This circuit allows it to maintain a constant output voltage even when the current to the load exceeds the rated limit. This is achieved by limiting the output current and thus preventing damage to the load.

Conclusion:

The BD9329AEFJ-E2 is a very efficient DC-DC switching regulator, offering features such as high switching efficiency, adjustable switching frequency and current limit protection. It is suitable for a wide range of applications, ranging from low power embedded systems to telecommunication systems requiring a stable 5V power supply. Its wide range of operating modes, including PWM and PFM, make it an ideal choice for a variety of applications.

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