CR-LED Commands
Copyright © ITECH Electronic Co., Ltd. 63
Chapter11 CR-LED Commands
This chapter describes the LED analog function related commands. The user
needs to set three parameters: Vo, Io, and Rd Coeff.. Where Io is the rated
output current of the LED power supply under test; Vo is the forward working
voltage of the LED when the forward working current is Io, and it can be
obtained from the VI curve in the LED specification. The real load is the series
connection of n LEDs, then Vo should be set to n times of the single-section
parameter, or it can be set to any value within the LED power supply output
voltage range; Rd Coeff. is the ratio of the series equivalent resistance (Rd) to
the total equivalent resistance (Vo/Io) of the LED load, that is, Rd Coeff.=
Rd/(Vo/Io). In series applications, the Rd Coeff. is only related to the selected
LED's VI curve, regardless of the number of series nodes.
LED:VOLTage
This command is used to set LED Vo.
Command Syntax
LED:VOLTage <Nrf+>
Parameters
0.001~MAX
Examples
LED:VOLT 18
Query Syntax
LED:VOLT?
Returned Parameters
<NR2>
LED:CURRent
This command is used to set LED Io.
Command Syntax
LED:CURRent <Nrf+>
Parameters
0~MAX
Examples
LED:CURR 0.35
Query Syntax
LED:CURR?
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