1SMB5928BT3G

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1SMB5928BT3G application field and working principle

The 1SMB5928BT3G is a single-chip, low-power, high-precision Zener diode specially designed for use in the field of low voltage embedded system design and power supply.

The working principle of a Zener diode is based on its symmetry. Generally, when the forward bias voltage is higher than the Zener voltage, or when the reverse bias voltage exceeds the Zener voltage, the diode breaks down and appears as a low-resistance line between the two points.

In the forward bias state, when the forward voltage applied to the terminal exceeds the Zener voltage, an avalanche effect occurs, and the largest current that the 1SMB5928BT3G can withstand is 3A. In the reverse bias state, when the reverse voltage is greater than the Zener voltage, the diode works in reverse breakdown.

In addition, the 1SMB5928BT3G has a thermal resistance junction to ambient of less than 400°C/W, which is suitable for low-voltage embedded systems with high current and low heat. Moreover, it features a low reverse current and superior ESD performance.

Apart from low voltage embedded systems, the 1SMB5928BT3G is also suitable for communications, portable equipment, and other storage equipment such as cell phone batteries, LED backlights and automotive displays.

Typically, it can be connected to the anode or cathode of the decoupling capacitor in the power circuit. When it is connected to the anode, the voltage stays stable, thus avoiding the flow of large current during high-voltage breakdown. When it is connected to the cathode, the voltage regulation is realized, and the voltage is not affected by the manufacturing quality of the Zener diode.

In summary, the 1SMB5928BT3G is a low-power and high-precision Zener diode designed for low voltage embedded systems and power supply. It has a thermal resistance junction to ambient of less than 400°C/W, a low reverse current and superior ESD performance. It is suitable for communications, portable equipment, automotive displays, LED backlights and other storage equipment.

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