App note from Bourns’ comparing current shunt resistors and hall effect current sensing pros and cons. Link here (PDF) Current sensing is an essential design function that is necessary in a broad range of applications. For example, current sensing is needed to detect a battery’s capacity, to measure current flow, or to calculate angles in […]
Tag Archives: Current sensing
App note: Comparison of DCR current sense topologies
App note from Richtek on the comparison of current sensing methods using inductor’s DCR. Link here (PDF) Current sensing plays an important role in DC/DC regulator systems, especially in multi-phase buck converters for CPU VCORE applications. In VCORE applications, the current signals are used to decide the load-line droop, per-phase current balance, current reporting, and […]
App note: How to filter the input of a high-side current sensing
App note from STMicroelectronics on high-side current sense RF noise filtering. Link here (PDF) In an application such as a power supply or a DC-DC converter, the voltage output is generally noisy. Some spikes load the current. Alternatively, a temporary over voltage might occur creating either common mode or differential noise. Such high frequency signals […]
App note: The benefit of using a three sense pin design on battery
App note from Vishay about correcting error when reading current on small valued shunt resistor using third pin. Link here (PDF) The low values of battery shunts being produced today necessitate the use of precision analog to digital converters (ADCs) to interpret the voltage drop across the shunt’s element. Many of these precision ADCs require […]
App note: Precision current measurements on high-voltage powersupply rails
Two methods for measuring current and what sense amplifier used are tackled in this app note from Texas Instruments. Link here (PDF) Current is a signal that can provide valuable insight into how a system is operating. Under defined conditions, the amount of current required to perform a task is consistent, making the current information […]
App note: Sub-1 V current sensing with the TS1001, A 0.8 V, 0.6 µA OP-AMP
Another TS1001 op-amp application from Silicon Labs on sensing nano currents. Link here (PDF) Current-sense amplifiers can monitor battery or solar cell currents, and are useful to estimate power capacity and remaining life. However, if the battery or solar source is a single cell, it’s difficult to find a low voltage solution that works below […]
App note: Current sensing in metering applications using a pulse current sensor and ST metering devices
App note from STMicroelectronics about current sensing using Rogowski coil together with STPMxx metering device. Link here (PDF) This application note describes the benefits of a current sensing system for metering applications using STPMxx metering devices and a current sensor developed by Pulse Engineering Inc. (hereafter referred to as “Pulse current sensor”), based on the […]
App note: Adjustable gain with a current sensing
Application note from STMicroelectronics for fine tuning gain on current sensing amplifier. Link here (PDF) This application note explains how to use current sensing amplifiers with series resistors on the sense inputs. This approach is especially useful for applications where the gain must be adjusted.
App note: Redefining a new state-of-the-art in microampere current-sense amplifiers
Silicon Lab’s TS1100 and TS1101 current sense amplifier’s features discussed in this app note. Link here (PDF) Sensing and controlling supply current flow are a fundamental requirement in most all electronic systems from battery-operated, portable equipment to mobile or fixed-platform power management and dc motor control. High-side current-sense amplifiers (or “CSAs”) are useful in these […]
Current sensing with the Arduino
Luca made an Amp-meter using the ACS712 current sensor, and the Arduino. The ACS712 is a fully integrated, hall effect based, linear current sensor. It converts the current that passes through its input pins to a proportional voltage on an output pin. He connected the output pin to an analog pin of his Arduino, and […]