SML4751HE3/61

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The SML4751HE3/61 is a part of the Zener single diode family, designed to be mounted on a substrate. It has an extended power supply voltage of up to 61 volts, making it suitable for a range of applications. Its range of features provides enhanced protection, accurate regulation, and improved thermal characteristics. Its operating temperature range is from –55°C to +125°C.

SML4751HE3/61’s Application Field

The extended voltage range of SML4751HE3/61 allows it to be used in a variety of applications. These include:

• Switch mode power supplies (SMPS)
• Battery charging
• LED lighting
• Backlight inverters
• Automotive lighting systems
• Audio amplifiers
• Communication devices
• Medical equipment
• Consumer electronics

SML4751HE3/61’s Working Principle

The SML4751HE3/61 is a silicon-based diode, constructed using a PN opened junction. When a positive current is applied to the P-type semiconductor, it allows electrons to cross over to the N-type semiconductor. This creates an electric field across the two semiconductors, which causes current to flow. The junction temperature rises as current increases, until the maximum voltage rating is reached.

When the reverse voltage is applied to the SML4751HE3/61, the majority carriers (electrons) in the N-type semiconductor cross over to the P-type semiconductor. This creates a reverse current in the opposite direction, and the voltage is clamped to the Zener voltage of the diode. This is known as Zener breakdown and is the working principle of the SML4751HE3/61.

The SML4751HE3/61 is paired with a resistive load for accurate regulation and better power conversion efficiency. The internal resistance of the diode will also limit the current going into the diode, protecting it from excessive current and providing enhanced protection.

The SML4751HE3/61 is able to withstand temperature variations from –55°C to +125°C, allowing it to be used in harsh environments. Its improved thermal characteristics ensure that the device is able to efficiently dissipate heat and maintain good performance. Its power dissipation rating is 600mW, giving it enough power to be used in a wide range of applications.

Conclusion

The SML4751HE3/61 is a Zener single diode device, designed to provide accurate regulation and improved thermal characteristics. It is suitable for a range of applications, including switch mode power supplies, battery charging and LED lighting. Its working principle is based on the Zener breakdown effect and it is paired with a resistive load for better power conversion efficiency. It is also able to withstand temperature variations and its power dissipation rating is sufficient for a range of applications.

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