UC3906NG4

Series:	--
Packaging:	Tube
Part Status:	Not For New Designs
Battery Chemistry:	Lead Acid
Number of Cells:	--
Current - Charging:	--
Programmable Features:	Current
Fault Protection:	--
Charge Current - Max:	--
Battery Pack Voltage:	--
Voltage - Supply (Max):	40V
Interface:	--
Operating Temperature:	0°C ~ 70°C (TA)
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-PDIP
Base Part Number:	UC3906

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UC3906NG4 application field and working principle

The UC3906NG4 is a single-channel peak current mode Buck controller perfectly suited for battery charging applications. The device is capable of converting a wide range of input voltage levels into a range of output voltage levels, making it relevant in many different scenarios. This makes the device suitable for a variety of applications, including portable and personal electronics, battery-based active power systems, renewable energy and solar energy storage, automotive and automotive supplies, medical devices, security systems, test instruments and measurement equipment and more.The UC3906NG4 stands out in a variety of applications due to its superior features. It is designed for both off-line and stand-alone operation, which makes it highly reliable. The maximum operating frequency is 500kHz, which provides excellent efficiency and fast transient response. This device also has a low start-up current that is well below that of comparably sized products, making it ideal for low-profile designs. The integrated soft-start feature makes the device an attractive choice for high-side charging applications.

Working Principle

The UC3906NG4 works on the principle of peak current mode control. The output regulation is controlled by sensing the voltage across a resistor connected across the output. The device can be configured for a wide range of output voltages using the Voltage Mode, or very precisely using the Current Mode peak regulation. The device also includes an integrated power supply, which eliminates the need for an external voltage source.The input voltage is regulated to a constant peak level set through a compensation circuit.If the output voltage is too high, the device reduces the average input voltage to the load. The device responds to dynamic changes in the current draw of the load by increasing or decreasing the peak current. In the event that the load draws more current than is available from the input, the device will try to maintain the output voltage by reducing the input voltage to the maximum allowed level.The UC3906NG4 provides excellent protection features to ensure the device is securely operating. It also offers overload protection and surge current protection. Additionally, the device monitors and shuts down in case of over-temperature restart. This ensures that the device remains safe and reliable even in extreme environmental conditions.Overall, the UC3906NG4 is a reliable, efficient, and cost-effective solution for battery charging applications. The peak current mode operation of the device, combined with the excellent protection features make it ideal for a variety of applications. From portable and personal electronics to renewable energy and automotive applications, the UC3906NG4 is sure to meet the requirements of demanding projects.

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