When do I need a high side sensing monitor?
This is the basic LTC6101 high side sensing supply-monitor configuration, where the supply current drawn by the IC is included in the readout signal. This configuration is useful when the IC current may not be negligible in terms of overall current draw, such as in low power battery-powered applications.
How are current sensing problems used in electronics?
Sensing and/or controlling current flow is a fundamental requirement in many electronics systems, and the techniques to do so are as diverse as the applications themselves. This Application Note compiles solutions to current sensing problems and organizes the solutions by general application type.
How does an over-top current sense circuit work?
Over-The-Top Current Sense. This circuit takes advantage of the microampere supply current and rail-to-rail input of the LT1494. The circuit is simple because the supply draw is essentially equal to the load current developed through R A. This supply current is simply passed through R B to form an output voltage that is appropriately amplified.
What is the current range of an an-105?
The monitored supply can range anywhere from V CC + 1.4V up to 48V. The A2 and A4 pins can be strapped various ways to provide a wide range of internally fixed gains. The input leads become very Hi-Z when V CC is powered down, so as not to drain batteries for example.
How is high load current caused by short detected?
High load current caused by short is not detected Current sensed in the supply path of the power connection to the monitored load. Current generally flows in just one direction (unidirectional). Any switching is performed on the load-side of monitor. Figure 2. High Side Current Sensing.
How does precision current sensing in supply rails work?
Precision Current Sensing in Supply Rails. The upper circuit (a) uses an instrumentation amplifier (IA) powered by a separate rail (>1V above V IN) to measure across the 1kΩ current shunt. The lower figure (b) is similar but derives its power supply from the APD bias line.
How does high side current sense and fuse monitor work?
High Side Current Sense and Fuse Monitor. This is a low voltage, ultrahigh precision monitor featuring a zero-drift instrumentation amplifier (IA) that provides rail-to-rail inputs and outputs. Voltage gain is set by the feedback resistors.