AN103 Datasheet - Siliconix

AN103 The FET Constant-Current Source/Limiter

www.DataSheet4U.com AN103 The FET Constant-Current Source/Limiter Introduction The combination of low associated operating voltage and high output impedance makes the FET attractive as a constant-current source. An adjustable-current source (Figure 1) may be built with a FET, a variable resistor, and a small battery. For optimum thermal stability, the FET should be biased near the zero temperature coefficient point. D S RL RS + A change in supply voltage or a change in load impedanc.

AN103 Features

* guaranteed peak operating voltage minimum of 100 V with a typical of 180 V. The J500 series features 50 V minimum with a typical of 100 V. The lower current devices in both series provide excellent current regulation down to as little as 1 V. Siliconix 10-Mar-97 Bias Resistor Selection All industry

AN103_Siliconix.pdf