ROHM (headquartered in Kyoto, Japan), a well-known Japanese semiconductor manufacturer, has developed a shunt resistor " PSR Series" for high-power and ultra-low resistance, suitable for in-vehicle and industrial equipment applications requiring high-power current measurement. The PSR 400 guarantees a rated power of 4W, and the PSR 500 guarantees a rated power of 5W, which adds a PSR series to the lineup of power resistors. This product has been mass-produced in October 2013 with a monthly capacity of 100,000. Considering the increasing demand in the future, it plans to increase production to 1 million per month. The production base is ROHM Integrated Systems (Thailand) Co., Ltd. (Thailand). Resistors for current sensing are used to detect overcurrent and battery power. It has been widely used in automotive and industrial equipment, but in recent years, with the development of high performance and electronicization in these fields, the amount of current in the circuit has been increasing, requiring products to support more power. In addition, there is an increasing demand for high-precision resistors that can suppress the ultra-low resistance of the power consumption of the circuit and ensure an excellent temperature coefficient of resistance in an excessive temperature environment. ROHM , which focuses on automotive and industrial equipment, is constantly strengthening its product lineup from resistors to transistors and diodes. This time, ROHM has fully utilized the high-quality resistor technology that has been accumulated in the low-power field and developed a resistor that supports high power, further improving the product lineup. The new PSR series products achieve a high power equivalent to 5W through the exclusive high-performance precision welding technology. At the same time, the resistor metal is made of high-performance alloy material, which makes the product have excellent resistance temperature coefficient in the low resistance range. TCR). As a result, this series of products can be easily adopted in the whole circuit of the vehicle and industrial equipment, which requires strict temperature assurance, which helps to reduce the design burden. ROHM has been far ahead of the world in the wide range of technologies required for resistors such as miniaturization, high integration, ultra-high precision, and ultra-low resistance. In the future, ROHM will continue to improve the lineup of resistors with higher power and lower resistance for the automotive and industrial equipment fields. 1. Unique precision welding technology to achieve high rated power equivalent to 5W In order to support high power, in order to achieve high detection accuracy in an ultra-low resistance range of 0.2 mΩ (min.), it is necessary to have a technique of stably bonding copper electrodes. This time, ROHM uses a unique precision welding technology to join the resistor metal and the thick copper electrode to achieve a structure with high heat dissipation and heat capacity. Thereby, not only a high power equivalent to 5 W is achieved, but also higher productivity is achieved. 2. Excellent temperature coefficient of resistance is also achieved in the ultra-low resistance range In general, the lower the resistance value, the higher the temperature coefficient of resistance. However, the resistor metal of this series uses high-performance alloy materials, which achieves excellent temperature coefficient of resistance (TCR) in the ultra-low resistance range. ?TCR (short for TemperatureCoefficientofResistance) Refers to the "resistance temperature coefficient". The lower the value, the smaller the change in the resistance value with respect to the ambient temperature change, and the fluctuation in the operation of the device can be suppressed. 220V To 110V Transformer,220 To 110 Converter,220 To 110 Voltage Converter,110V Transformer zhejiang ttn electric co.,ltd , https://www.ttnpower.com
January 12, 2023