LM334 Constant Current Source Test - Part 5/5 (LM334 Theory, Pracice, and DIY)

Introduction

The performance of LM334 High Current circuit is poor. I think the main reason is that the PNP BJT current amplification is difficult to design, because 

(1) The transistor needs to be in saturation mode, but static current gain is not well defined, and therefore bias current also not easy to specify.

(2) I could not any design/application notes on this high current circuit.

However, I found the following two references explaing very well the theory behind the LM334 device.  I am thinking of DIYing a similar CCS using power MOSFET, to achive high current.

Next post will not be talking on LM334.  In other words.  This is the last post of LM334.

References

[1]  Active Transistor Constant Current Source - electronics-notes.com

[2]  The Basic MOSFET Constant-Current Source June 06, 2016 by Robert Keim - aac

.END