LW015B94

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

DC/DC converters have become essential components in the power electronics industry, playing a key role in ensuring reliable power is transferred to applications which require a specific DC/DC voltage performance. The LW015B94 is one such DC/DC converter, designed and manufactured by STMicroelectronics, and this article takes a closer look at both the application field of the device and its underlying working principle.

Application Field

The LW015B94 DC/DC converter is suitable for a range of different applications, including low power communication network systems, high frequency switching applications, and power converters. This is largely due to its robust nature, with the device being capable of withstanding temperature shocks, humidity and vibration.

The LW015B94 is also a perfect fit for applications which require the use of low-noise power sources. This is because it operates using low switching frequency of about 10kHz, which reduces switching noise and alleviates the need for any extra EMI filtering. Furthermore, the converter has a 40V input-to-output differential rating, allowing the smooth and efficient conversion of DC power to DC/DC.

Overall, the LW015B94 is capable of supplying up to 15 watts of output power, and is equipped with a an adjustable switching frequency range so that it can be adapted for different operating conditions. This level of power is efficient and cost effective enough for it to be used as a power source for a range of low power requirements.

Working Principle

The LW015B94 utilizes a boost converter topology to convert a low input voltage into a higher output voltage. A boost converter is a type of DC/DC converter which works by using a switching transistor and an inductor to increase the voltage across its load. The device also contains an internal reference that sets the output voltage, ensuring that it remains constant despite fluctuations in the input voltage.

At switch-on, the input voltage supplies current to the inductor, which is then converted into a magnetic field. This magnetic field generates a voltage drop across the inductor, driving the output voltage higher than the input voltage. As the output voltage reaches its desired level, the switch is turned off and the magnetic field plummets in intensity. The stored energy in the inductor is then released back into the load, stabilizing the output voltage.

On a practical level, the LW015B94 DC/DC converter requires an external switching transistor, rectifier diode, output filter capacitor and a current sensing resistor for maximum efficiency. It also utilizes an internal voltage regulation loop to ensure that the output voltage is tightly regulated, even when the input voltage is subject to fluctuation.

The LW015B94 DC/DC converter is highly efficient in its operation, boasting a maximum efficiency of up to 87%. According to the datasheet, the device features a switching frequency of up to 100 kHz, a wide input voltage range of 2.5 – 40V, and an adjustable output voltage range of 0.6 – 20V. It also features a soft start circuitry, as well as an adjustable current limit and short-circuit protection.

Conclusion

The LW015B94 from STMicroelectronics is a versatile DC/DC converter suitable for a range of different applications, namely communication networks, high frequency switching, and power converters. Utilizing a boost converter topology to amplify input voltage, the device features up to 15 watts of output power and 87% efficiency, as well as adjustable frequency and voltage ranges, soft start and current limit. As such, it has become an essential component in the power electronics industry.

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