The IC regulates the voltage across the selected resistor to form the constant-current source. The current source delivers either 10 or 100 mA, depending on which emitter resistor is in the circuit.

The circuit uses a 9V battery and a voltage regulator to produce a steady power-supply voltage of 5V. From that voltage, the circuit produces a constant sink current, which is independent of the ...

In his video [Afroman] describes how the LM317 can be used to regulate current rather than voltage to provide a constant current source under varying load.

This article shows how to do just that—use a four-channel LED driver to drive three constant-current RGB LED strings and employ the fourth channel as a constant-voltage source.

A ripple-generating circuit is usually needed to ensure stability of constant-on-time (COT) controlled buck converters. Different values of the ripple generating circuit can have ...