rev.
page
date
1 of 4
1/2009
PART NUMBER:
VLD24-XXX
DESCRIPTION:
constant current dc-dc converter
applications
The VLD24-XXX series is a step-down
constant current source designed for
driving high power LEDs. The available
output currents are: 300mA, 350mA,
500mA, 600mA, 700mA. Despite its
compact size, the VLD24-XXX series is fully
featured with very high efficiency, wide
input voltage range, high ambient operating
temperature, and two means of LED dim-
ming: PWM digital dimming and analog
dimming control, via a trim POT.
features
•
•
•
•
•
•
•
•
power LED driver
high efficiency up to 95%
wide input voltage range
constant current output
PWM digital dimming
short-circuit protection
analog dimming
output on/off control
model
VLD24-300
VLD24-350
VLD24-500
VLD24-600
VLD24-700
input range
(V dc)
5.5~36
5.5~36
5.5~36
5.5~36
5.5~36
output voltage
(V dc)
2~32
2~32
2~32
2~32
2~32
output current
(mA)
0~300
0~350
0~500
0~600
0~700
dimming control
PWM+analog
PWM+analog
PWM+analog
PWM+analog
PWM+analog
efficiency
(%)
95
95
95
95
95
INPUT
parameter
input voltage
quiescent input
current in off mode
input filter
conditions/description
absolute max before device failure
opperating input range
Vin = 24V, V
DIM
< 0.6V
capacitor
min
5.5
nom
24
max
40
36
400
units
VDC
VDC
μA
OUTPUT
parameter
voltage range
current range
current accuracy
current stability
conditions/description
Vin is at least 1.5~4V higher than Vout
Vin-Vout > 1.5~4V
300~700mA
Vin = 24V, Vout = 2~32V
min
2
300
±8
±10
nom
max
32
700
±12
±18
±0.03
470
units
VDC
mA
%
%
%/°C
μF
temp. coefficient
-40°C ~ 71°C ambient
maximum capacitive
load
PROTECTION CIRCUIT
parameter
conditions/description
short-circuit protection regulated at rated output current
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
CUI [ CUI INC ]
