Table of Contents
Advertisement
� Rd: Resistance of operating point
A typical V - I characteristic curve of LED lights, as shown in Figure 2-45:
Figure 2-45 V - I characteristic curve of LEDs
According to the V-I curve, we can get Rd and Vd:
Choose V2, I2, V1, and I1 near the static working point (as shown in the
red circle of the curve). Users also can calculate the value of Vd and Rd
according to methods below:
Vd = V * 0.8 Rd= 0.2 V/I
Operating Steps
1. Connect device
Power on the instrument and connect the DUT and the channel input
terminals of the electronic load, as shown in Figure 2-2.
2. Set running parameters
Press the Shift + CR key on the front panel to enter LED test mode, as
shown in 2-46.
53
Advertisement
Table of Contents
