The article offers information on the AL5890 linear constant current regulator, which are available in 10 mA, 15 mA, 20 mA, 30 mA, and 40 mA, used for light emitting diodes (LED) application from Semiconductor manufacturing company Diodes Inc.ECN: Electronic Component News...
Linear voltage regulators provide one of the simplest ways to produce a constant current. Because the voltage between a linear regulator's output and ground is tightly regulated, a fixed resistor connected between those two nodes produces a constant current between the output and ground. ...
Linear constant current LED drivers meet this requirement, as only few very small components are necessary. Infineon’s BCR linear LED driver ICs are the best choice for driving LED strings supplied by a DC voltage source. The BCR regulators are suitable for driving currents from 10mA to 250...
Linear constant current LED drivers meet this requirement, as only few very small components are necessary. Infineon’s BCR linear LED driver ICs are the best choice for driving LED strings supplied by a DC voltage source. The BCR regulators are suitable for driving currents from 10mA to 250...
from 0.8 V up to 5.0 V in 50 mV step • Logic-controlled electronic shutdown • Internal soft-start • Optional output voltage discharge feature • Compatible with ceramic capacitor COUT = 0.47 µF • Internal constant current and thermal protections • Available in STSTAMP™ (0.47...
Constant Current Regulator Figure 28. Slow Turn−On Regulator Input 3 LM1117 2 Output 10 + mF XTA 1 120 + 10 mF Output Control 1.0 k On Off 1.0 k 2N2222 360 Vout(Off) + Vref Figure 29. Regulator with Shutdown Input 10 mF 3 + LM1117 XTA 1 2 Output R1 + 10 mF R2 2N2222 ...
LD39020 Datasheet 200 mA very low quiescent current linear regulator IC DFN4 1x1 SOT23-5L Maturity status link LD39020 Features • Input voltage from 1.5 to 5.5 V • Ultra low dropout voltage (200 mV typ. at 200 mA load) • Very low quiescent current (20 µA typ at no load, ...
The IC uses an external capacitor (CSS) on the soft-start pin and an internal constant-current source (ISS) to linearly charge this capacitor, which is initially tied to the regulator's error amplifier. Once the capacitor is charged to the same value as the internal reference voltage, VREF...
similar way, the negative feedback circuit increases VCEto ensure the accurate regulation of the 3.3V output. In summary, any variation of VOis absorbed by the linear regulator transistor’s VCEvoltage. So the output voltage VCCis always constant and well regulated....
The control circuit detects the output voltage, and changes the on-resistance of the series-pass power transistor by changing its base current to keep the output voltage constant. The power dissipation in the linear regulator is a function of the difference between the input and the output voltag...