Issue link: https://resources.mouser.com/i/1442820
| 14 | To determine the inductor current, designers can use the following equation: V sense =IoxR sense Typically, in this type of application, V sense will be set to 100mV to save power and, at the same time, keep the voltage level high enough above the noise. To sense a 250A average output current, for example, R sense must be 100mV/250A=0.4mΩ. As the voltage drop generated by the current is quite low, it is important that error voltage is minimized. Sources of error voltages include thermal electromotive force (EMF), voltage drop on leads and induced voltages due to inductance. Error voltages can be kept to a minimum by careful selection of resistive lead frame materials and tight process control. An optimal sensing voltage solution for micro hybrid DC/ DC applications is the Bourns ® Model CSS2H current sense resistors. Helping developers save energy while maximizing sensing performance in their designs, the Model CSS series features low Temperature Coefficient of Resistance (TCR) down to 0.0002Ω for operating accuracy over wide temperature ranges and excellent long-term stability. Addressing extended temperature automotive requirements, they offer a wide operating temperature range (-55 to +170°C), low thermal EMF and high current handling up to 120 A. Benefits For Micro Hybrid Designs Helping to ensure a more efficient converter design, Bourns ® Model PQ series inductors deliver the very low R dc necessary to reduce DC losses. They also offer stable inductance over a wide range of currents while meeting the high operating temperature (150˚C) requirements of many automotive applications. Its flat wirewound design provides a compact inductance solution that is particularly well suited for automotive power conversion applications such as the micro hybrid vehicle. Boosting the overall efficiency of DC/ DC converters, the Model PQ series inductors feature low power dissipation combined with the low core loss nature of their ferrite core construction. In addition, these devices are mounted on a plastic base designed with an extra solder pad for increased mechanical stability. The Bourns ® Model CSS2H current sense resistors represent a new generation of high-power current sense resistors that match designers' needs for an accurate device in higher power applications. In micro hybrid vehicle designs, they are key components in monitoring a voltage drop across the sense resistor and converting it to a current reading to assist in the efficient operation of the circuit. Bourns continues to be a leader in offering enhanced solutions for high frequency, high current start-stop automotive applications through its extensive portfolio of approximately 2,000 inductors. Designers can select from a broad range of flat wire conductors and powdered iron cores that are molded directly to the wire in a wide range of inductance values. Key Features: • AEC-Q200 compliant • Excellent long-term stability • Very low resistance Key Features: • High saturation current of up to 100A • Extra solder pad for increased mechanical stability • Low power dissipation CSS Current Sense Resistors PQ Flat Wirewound Shielded Power Inductors mouser.com/new/bourns/ bourns-current-sense-resistors/ mouser.com/new/bourns/ bourns-shielded-power-inductors/