cui.com
date 11/28/2012
page 1 of 6
SERIES: VLD25-DIP │ DESCRIPTION: LED DRIVER
date 11/28/2012
page 1 of 6
FEATURES
• power LED driver
• wide input and output voltage range
• DIP package
• constant current output
• PWM dimming and analog dimming
• short circuit protection
• high efficiency up to 95%
PART NUMBER KEY
VLD25 - XXX -DIP
Base Number Output Current
MODEL input
voltage
output
voltage
output
current
ripple and
noise
dimming
control
effi ciency
range
(Vdc)
range
(Vdc)
range
(mA)
max
(mVp-p)
typ
(%)
VLD25-300-DIP 5.5 ~ 46 3.3 ~ 36 0 ~ 300 120 PWM+analog 95
VLD25-350-DIP 5.5 ~ 46 3.3 ~ 36 0 ~ 350 120 PWM+analog 95
VLD25-500-DIP 5.5 ~ 46 3.3 ~ 36 0 ~ 500 120 PWM+analog 95
VLD25-600-DIP 5.5 ~ 46 3.3 ~ 36 0 ~ 600 120 PWM+analog 95
VLD25-700-DIP 5.5 ~ 46 3.3 ~ 36 0 ~ 700 120 PWM+analog 95
For more information, please visit the product page.
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date 11/28/2012 │ page 2 of 6CUI Inc │ SERIES: VLD25-DIP │ DESCRIPTION: LED DRIVER
INPUT
parameter conditions/description min typ max units
operating input voltage absolute max before device failure
operating input range
5
5.5 24
55
46
Vdc
Vdc
quiescent input
current in off mode Vin = 24 V, Vc < 0.6 V 400 μA
fi lter capacitor 1 μF
remote on/off dc-dc ON
dc-dc OFF
open or 2.8 V < Vc < 6V
Vc < 0.6 V
remote pin current Vc = 5V 1mA
PWM frequency 0.2 kHz
input voltage - analog dimming Vin = 5.5 ~ 4.6 V 0 15 V
control voltage -
analog dimming
full on
full off
0.15
4.3
0.20
4.5
0.25
4.7
V
V
driving current -
analog dimming Vc = 5 V 0.2 A
OUTPUT
parameter conditions/description min typ max units
voltage range Vin = 46 V , Vo = 3.3 V ~ 36 V 3.3 36 Vdc
voltage drop Vin = 5.5 ~ 46 V, 1 ~ 10 LED 2 3 4 Vdc
current accuracy 300~600 mA
700 mA
±3
±5
±5
±7
%
%
output current range -
analog dimming Vin = 5.5 ~ 46 V, 1 ~ 10 LED 0 100 %
current stability Vin = 46 V, Vo = 3.3 V ~ 36 V ±1 %
temperature coeffi cient -40 ~ 71°C ambient ±0.015 %/°C
capacitive load 1,000 μF
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection continuous automatic recovery
SAFETY AND COMPLIANCE
parameter conditions/description
EMI/EMC EN 55015 power port, CISPR22 Class B, IEC/EN 61000-4-(2, 3, 4, 5, 6)
RoHS compliant yes
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature 300/350 mA
500/600/700 mA
-40
-40
85
71
°C
°C
storage temperature -55 125 °C
maximum case temperature 100 °C
For more information, please visit the product page.
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date 11/28/2012 │ page 3 of 6CUI Inc │ SERIES: VLD25-DIP │ DESCRIPTION: LED DRIVER
10.20 [0.401]
7.62 [0.300]
1
4
3
5
6
9.50 [0.374]
2 2.80 [0.898]
10.20 [0.402]
7.62 [0.300]
2.54 [0.100]
17.78 [0.700]
9.50 [0.374]
4.10 [0.161]
0.50 [0.020]
∅
0.50 [0.020]
(Bottom View)
Side View
2
MECHANICAL DRAWING
PIN CONNECTIONS
Pin Function
1 Vin
2 analog dimming
3 ON/OFF/PWM
4 GND
5 -Vout
6 +Vout
RECOMMENDED FOOTPRINT (TOP VIEW)
unit: mm(inch)
Pin tolerances: ±0.10mm(±0.039inch)
General tolerances: ±0.25mm(±0.010inch)
2.54[0.100]
17.78[0.700]
2.54 [0.100]
∅
0.80 [0.031]
1
4
3
5
6
2
MECHANICAL
parameter conditions/description min typ max units
dimensions 0.898 x 0.402 x 0.535 inch (22.80 x 10.20 x 13.60 mm)
case material epoxy resin (UL94-V0)
weight 4.3 g
Operating Temp.( )
C
DERATING CURVE
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date 11/28/2012 │ page 4 of 6CUI Inc │ SERIES: VLD25-DIP │ DESCRIPTION: LED DRIVER
1. Typical Application Circuits
2. Digital Dimming Control
3. Analog Dimming Control and Application Example
APPLICATION NOTES
1st LED
Last LED
VLD25-DIP
+Vin
GND
1
4
3
6
5
(PWM Dim/ON/OFF)
2
(Analog Dimming Control)
+Vout
-Vout
1st LED
Last LED
6
5
+Vin
GND
1
4
3
(PWM Dim/ON/OFF)
2
+Vout
-Vout
PTC PTC
Series Application Parallel-series Application
VLD25-DIP
(Analog Dimming Control)
Ouput Current
Voltage Control (0-15 V max.)
9 9 9 9 9 9 9
Analog Input Voltage
1st LED
Last LED
VLD25-DIP
+Vin
GND
15K
6K8
On/Off
(Optional)
0-10V
1
4
6
5
32
Formula for output current:
Io,set refers to the expected output current value.
Io,norm refers to the rated output current
D refers to the pulse width of the PWM signal
T refers to the cycle of the PWM signal
Note: This formula is only supplied as a reference and the output current may be deviated from for different load conditions. The Ton(min) of PWM signal must
be greater than 0.8ms, otherwise the driver cannot be operated normally. It is natural for the driver to generate audible noise during dimming process
because the frequency of the control circuit is within human audible range (20Hz~20kHz). In order to make the LED fl ashes not visible to human eye, the
PWM dimming frequency is recommended to be set above 100Hz. PWM curve (Vin=24 V, 5 LEDs)
Io,set = (DT-0.8) Io,nom
T
PWM Digital Control Signal
0
1
0
1
0
1
0
1
0
1
PWM Digital Control Signal
PWM Digital Control Signal
Output Current Output Current(LED appears bright) Output Current(LED appears dim)
To protect the LED(s), you could connect a PTC to input of all channels as shown in application circuit.
Note: Negative output terminal should not conneted to GND. Module may be damaged.
For more information, please visit the product page.
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date 11/28/2012 │ page 5 of 6CUI Inc │ SERIES: VLD25-DIP │ DESCRIPTION: LED DRIVER
4. EMC Recommended Circuit
VLD25-DIP
㻗
Vin
GND
Tvs C1 C2 C3 C4
C5
L
1
+Vout
-Vout
C6
R1
DIM
㻖
1
4
6
3
5
1st LED
Last LED
1
EMI/EMC recommended circuit
RECOMMENDED PARAMETERS
COMPONENTS SPECIFICATIONS
Tvs SMC51A, 1500 W (ON)
L1 CD53-82μH (CEAIYA)
C1 470μF/100V (NCC)
C2 225K/50V 1210 X7R (TORCH)
C3 104K/50V 0805 X7R (TORCH)
C4 105K/50V 0805 X7R (TORCH)
C5 102K/2000V 1210 (TDK)
C6 470pF/100V 0805 (TORCH)
R1 680Ω 0805
(can be replaced by inductance
or magnetic bead)
For more information, please visit the product page.
date 11/28/2012 │ page 6 of 6CUI Inc │ SERIES: VLD25-DIP │ DESCRIPTION: LED DRIVER
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical
component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to
affect its safety or effectiveness.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 10/15/2012
1.01 misc. updates 11/02/2012
1.02 added product photo 11/28/2012
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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