Please recommend a linear LED constant current source driver chip

elec32156

Please recommend a linear LED constant current source driver chip [Copy link]

A project requires 8 infrared LED lights. Because they are sensitive to EMI, they cannot use drivers with switching quantities and can only use linear ones.

The parameters of the infrared LED lamp are Vf = 1.5V, If = 100mA;

It would be best if multiple outputs are connected in parallel, thank you!

chrisrh

How about building a circuit using the LM324 op amp and output reference?

qwqwqw2088

Is the power supply method ACDC or DCDC battery method?

qwqwqw2088

High power factor linear constant current LED driver chip SM2087

andy_tim

elec32156

qwqwqw2088 posted on 2021-11-3 14:27 High power factor linear constant current LED driver chip SM2087

The power supply voltage is DC 12V, and SM2087 doesn't seem to work.

elec32156

chrisrh posted on 2021-11-3 11:46 How about building a circuit using the LM324 op amp and output reference?

I don't know how to use it, is there a reference circuit?

yulei2633

SM2082EG is a dual-channel LED linear constant current drive control chip. The output current is set by the external Rext resistor. The maximum current can reach 100mA, and the output current does not change with the chip OUT port voltage. It has good constant current performance. The system structure is simple, with very few peripheral components, built-in over-temperature protection function, low solution cost, small space, and easy to pass EMC