The current
light-emitting diode driver chips can be classified by type: constant
pressure-driven chip-type constant-current driver chips, as well as
pulsed driver chips. One constant pressure-driven chip in general is
our common DC / DC step-up chip majority. This program has the
advantage of low cost chips without complex peripheral circuits. But
only a constant voltage drive LED will cause a driver circuit output
current is not controllable. LED brightness can not guarantee
consistency.
Constant current-type driver chips are resolved before the constant
pressure-driven current does not control the problem. Currently the
chip can do a better constant current of about 1% of the constant
current accuracy, but also simple external control interface can be
flexibly set the desired output of the current size of the so popular. |
