TLF9UB302W

Voltage Rating - AC:	--
Package / Case:	Vertical, 4 PC Pin
Height (Max):	0.630" (16.00mm)
Size / Dimension:	0.669" L x 0.433" W (17.00mm x 11.00mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-25°C ~ 115°C
Series:	TLF9
Voltage Rating - DC:	50V
DC Resistance (DCR) (Max):	1.5 Ohm
Current Rating (Max):	400mA
Number of Lines:	2
Filter Type:	Signal Line
Part Status:	Obsolete
Packaging:	Bulk

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Common Mode Chokes (CMCs) are increasingly important inductors in modern consumer electronics, offering a means of attenuating unwanted electromagnetic radiation emissions from digital and other electronic systems. One of the most popular CMCs currently available is called the TLF9UB302w. This article will discuss the application field and working principle of this device.The TLF9UB302w is a small, lightweight common-mode filter choke with an ideal frequency range of 100 KHz to 250 KHz and a working temperature range between -40°C to +85°C. It is designed to provide excellent EMI interference shielding according to EN55032 Class B limits and is offered in several different package sizes including 0402 (1.1mm x 0.75mm), 0603 (1.6mm x 0.8mm), and 0805 (2.0mm x 1.2mm). It is typically used for high-speed data line interference suppression in mobile phones, digital audio devices, USB/HDMI cables, base band frequencies, and similar applications.The TLF9UB302w operates based on the principle of magnetic field induction. This principle states that when a current passes through a coil of wire, it creates a magnetic field around it. This magnetic field induces a small voltage into another coil of wire that is placed nearby. This induced voltage is then passed through a capacitor into an external circuit, where it can be used to reduce or eliminate electromagnetic radiation and other forms of interference.In the case of the TLF9UB302w, this induced voltage passes through two pins on the device which are connected to the external circuit. The voltage is then reduced or eliminated, depending on the amount of inductance present on the coil. The inductance of the coil can be adjusted, allowing for flexibility and customisation of the device.The TLF9UB302w is also able to provide better filtering performance than other common-mode filter chokes due to its impedance design. This design is composed of two coils on one side of the device and two capacitors on the other side. This arrangement creates an alternating series of resistive and reactive inductive impedances which improve the effectiveness of the EMI attenuation.In summary, the TLF9UB302w is a small, lightweight common-mode filter choke that is used for electromagnetic interference shielding in mobile phones, digital audio devices, and other consumer electronics. It has an ideal frequency range of 100 KHz to 250 KHz and a working temperature range of -40°C to +85°C. Its principle of operation is based on magnetic field induction, and the device features an alternating series of resistive and reactive inductive impedances for improved filtering performance.

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