BB187,115 Discrete Semiconductor Products

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Diodes are semiconductor devices that conduct electric current in one direction and block current in the opposite direction. Variable capacitance (Varicaps, Varactors) diodes, or varactors, are a type of junction semiconductor device based on the variable capacitance property of p-n junctions. BB187,115 is a Diode variable Capacitance type of Varactor that shares the same characteristics with other diodes in its family.

Description of BB187,115

The BB187,115 is a diode that features a 10-pin dual in line (DIP) package. It has a reverse voltage (V_r) rating of 400 V, with a doping junction to cover up to 500 V. Capacitance (C) is variable, with a minimum of 4.5 pF and maximum of 38 pF. Its capacitance displays a linear change in scale with a reverse voltage of ± 20 volts. Typical breakdown voltage is greater than 400 V, though its temperature operating range is from - 40°C to 125°C. Its f_T is 200-300 MHz, with a q_V of 0.6-0.8.

Applications of BB187,115

Being a varactor, this diode is used mainly as a voltage-controlled capacitor. A voltage can define its capacitance, which is why it is used in different applications where this feature is important. It is especially used in the telecommunications sector, to tune circuits. This diode is used in the manufacturing of voltage controlled oscillators (VCO) utilized in microwave communication systems, as well as tuners. It is also used as harmonic generators and multipliers, among other applications that need electrical control or gain in a specific frequency range.

Working Principle of BB187,115

The BB187,115 works similarly to other Varicaps, by producing a voltage-variable capacitance, mainly in response to changes in reverse bias. It is based on a reverse-biased diode, which means that a small reverse-bias was placed on the device under tests. As a result of this, the current decreases and the capacitance of the diode increases. In other words, when the reverse voltage increases, the reverse current also increases and this modifies the electric field at the junction in such a way that it decreases the capacitance of the diode. At the same time, the capacitance voltage-dependence improves, resulting in a more linear capacitance-voltage relationship.

Advantages of BB187,115

The BB187,115 is an efficient, reliable, and stable Varicap that offers excellent linearity. Together with its small size and low cost, this makes it an ideal choice for many applications, from frequency-moving to low and high frequency applications. It is housed in a cost effective 10-pin DIP and is a good choice for tighter spaces. Furthermore, both the capacitance and high-reverse voltage rating are great for applications across the industry.

Disadvantages of BB187,115

The main disadvantage of this type of Varicap is its highest allowable power dissipation, which is relatively low at just 1.5 W. As such, it is not suitable for higher power applications. Additionally, the linearity of the capacitance voltage-dependence can decrease if too much current is applied. This could pose additional issues in higher power applications.

Conclusion

The BB187,115 is a voltage-variable capacitance type of Varicap, used mainly for frequency tuning applications. It has both advantages and disadvantages, all of which must be taken into account before selecting it for a specific application. The small size, high capacitance range, and low cost of this diode make it a convenient solution for many applications, though its low power dissipation rating is a limitation that should not be overlooked.

The specific data is subject to PDF, and the above content is for reference