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VLD25-350-SMT-TR

P1-P3P4-P6
cui.com
date 11/01/2012 │ page 4 of 6CUI Inc │ SERIES: VLD25-SMT │ DESCRIPTION: LED DRIVER
1. Digital Dimming Control
2. Analog Dimming Control and Application Example
APPLICATION NOTES
50% Duty Cycle
80% Duty Cycle
Output current
Output current(LED appears dimmer)
Output current(LED appears brighter)
20% Duty Cycle


Ouput Current
Voltage Control (0-15 V max.)
9
9
9
9
9 9
9
Analog Input Voltage
1st LED
Last LED
VLD25-SMT
+Vin
GND
5K1
5K6
On/Off
(Optional)
0-10V
16
1
9
8
710
For the rated frequency PWM dimming, the output current of driver matters to the pulse width of the PWM signal, and the numerate please refer to the
following formula:
I
o,set
refers to the expected output current value.
I
o,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: The formula only supplies as a reference, and the output current may be a little deviation with different load. The Ton(min) of PWM signal must be
greater than 0.7ms, or the driver can’t be operated normally. It is natural for the driver to generate an audibly noise in dimming process, because the
frequency of the control circuit is within human audibly range (20Hz~20kHz). In order to avoid the human eye can observe the LED fl ashes, the PWM
dimming frequency is recommended to set above 100Hz.
I
o,set
=
(DT-0.6)
I
o,nom
T
For more information, please visit the product page.
cui.com
date 11/01/2012 │ page 5 of 6CUI Inc │ SERIES: VLD25-SMT │ DESCRIPTION: LED DRIVER
3. EMC Recommended Circuit
4. Recommended Refl ow Soldering Profi le
1st LED
Last LED
VLD25-SMT
+Vin
GND
16
1
7
9
8
470uF
1.0uF
(PWM Dim/ON/OFF)
10
(Analog Dim)
+Vout
-
Vout
+
1.25mH
2.2uF
1.0uF
SMCG51
㻗
Vin
GND
+Vout
-Vout
Load
Tvs
C0
C1 C2
C3
R1
LCM
VIN
DIM
GND
VO+
VO-
VLD25-SMT
2
DIM
㻖
1
EMI/RFI conducted EN55022 recommended circuit
EMI/EMC recommended circuit
Notes: 1. DIM pin is the module's PWM dimming pin
2. While adding circuit, it may extend the PWM dimming output reaction time
EMI/EMC STANDARD
ITEM STANDARD LEVEL PREDICATE REMARK
EMI conducted EN 55015 power port qualifi cation add external circuit 1
ESD IEC 61000-4-2:2001 level 2 B +4kV add external circuit 2
Surge IEC 61000-4-5:2004 level 2 B +1kV add external circuit 1
EFT IEC 61000-4-4:2004 level 2 B +1kV add external circuit 1
RECOMMENDED PARAMETERS
COMPONENTS SPECIFICATIONS
Tvs SMCJ48A, 1500 W (Bringtking)
LCM 6.8 μh CD43 (CEAIYA)
C0 470 μF / 50 V (CapXon)
C1 4.7 μF / 50 V 1210 (TORCH)
C2 2.2 μF / 50 V 1210 (TORCH)
C3 470 PF / 100 V 0805 (TORCH)
R1 680 Ω 0805 (can be replaced by
inductance or magnetic bead)
0
50
100
150
200
250
Time (sec.)
T
e
m
p
e
r
a
t
u
r
e
(
C
)
60 Max
(>220 C)
Sec
220 C
10 MaxSec
Peak.Temp 240 C
For more information, please visit the product page.
date 11/01/2012 │ page 6 of 6CUI Inc │ SERIES: VLD25-SMT │ 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 02/20/2012
1.01 V-Infi nity branding removed 09/07/2012
1.02 added TR package option 11/01/2012
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
For more information, please visit the product page.
P1-P3P4-P6

VLD25-350-SMT-TR

Mfr. #:
Buy VLD25-350-SMT-TR
Manufacturer:
Description:
LED Power Supplies LED driver (dc) , 350 mA, 5.5 48 Vdc input, 3.3 36 Vdc output, SMT, T&R package
Lifecycle:
New from this manufacturer.
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