Two process control signaling schemes were to be supported — the 0 to 10 VDC analog signal, and the venerable 4-20 mA current loop.

The circuit uses a P-channelMOSFET, Q 1 , to control the rate ofchange of the output voltage (Figure1 ). You drive the MOSFET with a constant-current source comprising Q 4 andR CS , which feeds ...

The circuit shown is a simple current limiter and is recommended since it offers a higher efficiency than other transistor circuits. It works to limit the current through R_sense such that the ...

Figure 2 This simple current source (Simple Source) circuit provides accuracy with a single resistor by floating the power supplies of the output stage. Isolated dual output DC to DC converters are ...

A Simple Over-Voltage Protection Circuit for LED Drivers This boost circuit implements current mode control and senses the LED current via resistor R14. The output voltage is boosted to just over 30V ...

The simple addition of a transistor and resistor to the open-circuit drive overcomes this dilemma by limiting current through the drive transistor. Transistor Q2 provides the open-collector drive ...

Most circuits that require current loss detection use expensive isolation amplifiers. This circuit solves that problem with a simple and low-cost method to detect current loss of 4-20 mA.

ECEA 5708 Current Mode Control ECEA 5708 Current Mode Control 4th course in the Modeling and Control of Power Electronics Instructor: Dragan Maksimovic, Ph.D., Professor The course is focused on ...