VLD24-XXX Datasheet, PDF (1/4 Pages) CUI INC – constant current dc-dc converter

PART NUMBER: VLD24-XXX
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.
rev.
page ^{1 of 4}
date ^1/2009
DESCRIPTION: constant current dc-dc converter
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
OUTPUT
parameter
conditions/description
voltage range
Vin is at least 1.5~4V higher than Vout
current range
Vin-Vout > 1.5~4V
current accuracy 300~700mA
current stability
Vin = 24V, Vout = 2~32V
temp. coefficient
-40°C ~ 71°C ambient
maximum capacitive
load
PROTECTION CIRCUIT
parameter
conditions/description
short-circuit protection regulated at rated output current
min
nom
max
units
40
VDC
5.5
24
36
VDC
400
μA
min
nom
max
units
2
32
VDC
300
700
mA
±8
±12
%
±10
±18
%
±0.03 %/°C
470
μF
20050 SW 112^th Ave. Tualatin, Oregon 97062 phone [phone] fax [phone]