Datasheet

voltage of the PSU - the current flows over the Z-diode but not the LED chip. Please note that the
Z diodes can withstand high power for a short time period only. This is why they do not always
prevent the ACULED from electrical damage.
Standard Drivers for the ACULED
Excelitas provides different standard four-channel drivers and power supply units (PSU) for
the ACULED. These drivers are designed to operate each chip of an ACULED VHL or DYO
individually and work together for all LED chips from UV via VIS to IR. They are not suitable for
photodiodes or NTC chips. If you have an ACULED DYO with an NTC or PD you can just leave
one channel open and use the other three channels for your ACULED LED chips. For a detailed
description of the PSUs please refer to the according datasheets. The following products are
available (see figure 25):
• ACULED Power Supply; 350 mA; PSU-ACL-01-350
• ACULED Power Supply; 700 mA; PSU-ACL-01-700
• ACULED DMX Power Supply; 350 mA; PSU-ACL-01-350 DMX 220V
• ACULED DMX Power Supply; 700 mA; PSU-ACL-01-700 DMX 220V
Please note to always connect the ACULED to the PSU first and turn off all switches before you plug
your PSU into your wall socket to avoid damaging the ACULED by voltage peaks.
Figure 25
ACULED drivers:
Left: Standard PSU.
Right: DMX PSU.
Four-Channel PSU LED driver
The standard four channel ACULED PSU LED drivers are available as 350 mA and 700 mA
versions and suitable to operate the ACULED with 350 mA 700 mA per channel respectively .
Table 6 shows the main parameters of the PSUs. These drivers are suitable for a large variety
of applications and can even drive up to five serially cascaded ACULEDs. Each channel can be
adjusted manually from 0 mA to 350 / 700 mA for continuous tuning of LED brightness and
color.
When connecting the driver to your wall socket use the L connection for line (US: black wire), the N
connection for neutral (US: white wire) and PE for ground.
www.excelitas.com Driving the ACULED® VHL™ 22