ROHM Semiconductor announced the development of the GMR320 series of shunt resistors featuring a rated power of 10W, the largest in the high-power, low-ohmic GMR lineup designed for high-power applications in the automotive, industrial equipment, and home appliance sectors. Recent years have seen an increasing demand in the automotive and industrial fields for higher power applications that consume less power. […]
Resistors
High-power current sense resistors meet automotive quality standards
Bourns, Inc. announced the addition of nine new models to its existing AEC-Q200 compliant Model CSM2F High Power Current Sense Resistor Series. Bourns designed the new series as efficient, reliable, cost-effective, and accurate measurement solutions for the battery management systems (BMS), industrial control, and other high current applications. Current sense resistors are growing in popularity due to […]
Measuring a sense-resistor’s voltage drop, Part 2: Isolation
Measuring the voltage drop across a current-sense resistor can be a trivial issue or a challenging one depending on the rail voltage and other factors. The problem with low-side sensing is that it “ungrounds” the load, and the alternative is high-side sensing. This part looks at the use of isolation to deal with CMV […]
What are switched capacitor filters, amplifiers and integrators?
Switched capacitors (SCs) are highly-versatile circuit elements that can be used to provide various functions, ranging from micro-scale implementations embedded in integrated circuits (ICs) or designed into wearables and other small devices, to a variety of power conversion applications, up to grid-scale systems. This FAQ series will explore the versatility of switched-capacitors. Following this initial […]
Measuring a sense-resistor’s voltage drop, Part 1: Sensing issues
Measuring the voltage drop across a current-sense resistor can be a trivial issue or a challenging one depending on the rail voltage and other factors. In previous articles, we looked at an apparently simple issue of sizing the resistor used for this common technique for current sensing (EE World Content References 1 and 2). This […]
A tradeoff case study: Sizing the current-sense resistor, Part 2
The conceptually simple idea to determine current by measuring voltage across a known resistor shows the subtle nature of design tradeoffs. Part 1 of this article looked at one important aspect of the choice of resistor value in current-sensing applications, but it was only the electrical impact. However, the thermal impact related to resistor I2R […]
A tradeoff case study: Sizing the current-sense resistor, Part 1
The conceptually simple idea to determine current by measuring voltage across a known resistor shows the subtle nature of design tradeoffs. There’s probably no phrase that misrepresents the realities of engineering design other than “hey, that should be no big deal.” Even simple-looking design decisions are often not so simple. The reality is that a […]
80 V RETs feature overhead to handle spikes and pulses
Nexperia announced the industry’s first 80 V RET (Resistor-Equipped Transistor) family. These new RETs or ‘digital transistors’ provide enough headroom for use in 48 V automotive board net (e.g. mild hybrid and EV cars) and other higher voltage circuits which are often subject to large spikes and pulses that previous 50 V parts cannot handle. […]
SMD Metal-Foil-on-Ceramic resistors boast high surge tolerance, low self-heating
TT Electronics announced the introduction of its Metal Foil Chip (MFC) resistors. The MFC series uses metal foil on ceramic technology, which combines the heat spreading properties of a ceramic substrate with the surge tolerance of a bulk metal alloy resistance element. This, in turn, offers lower self-heating levels than thick-film or metal strip resistors and better surge tolerance than thick-film options, making these resistors particularly well-suited for automotive, industrial, and medical […]
High-power current shunt modules feature 1.5-kV isolation
Riedon has introduced the SSA Smart Shunt series next-generation current sensing modules that combine the attributes of conventional passive shunt resistors with those normally associated with considerably more expensive and bulky closed-loop Hall Effect current sensors. Each featuring a built-in precision amplifier, they offer reinforced electrical isolation (up to 1500VDC), alongside industry-leading levels of stability […]
