EN 55015 power port, EN 55015, IEC/EN 61000-4-(2, 3, 4, 5, 6)
yes
ENVIRONMENTAL
parameter
operating temperature
storage temperature
maximum case temperature
conditions/description
300/350 mA
500/600/700 mA
min
-40
-40
-55
typ
max
85
71
125
100
units
°C
°C
°C
°C
MECHANICAL
parameter
dimensions
case material
weight
cui.com
conditions/description
0.94 x 0.71 x 0.31 inch (23.86 x 18.1 x 8.0 mm)
epoxy resin (UL94-V0)
6
g
min
typ
max
units
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VLD25-SMT
│
DESCRIPTION:
LED DRIVER
date
11/01/2012
│
page
3 of 6
MECHANICAL DRAWING
unit: mm(inch)
Pin tolerances: ±0.10mm(±0.039inch)
General tolerances: ±0.25mm(±0.010inch)
15.24 0.600
1.02 0.040
(6 PLCS)
0.50 0.020
(6 PLCS)
16
10 9
18.10 0.713
1
7
8
3.04 0.120
2.54 0.100
1.40 0.055
0.20
23.86 0.939
13.70 0.539
5° max
8.00 0.315
7.50 0.295
0.25 0.010
A
DETAIL A
SCALE 8 : 1
PIN CONNECTIONS
Pin
1
7
8
9
10
16
Function
GND
-Vout
+Vout
analog dimming
Vin
ON/OFF/PWM
RECOMMENDED FOOTPRINT (TOP VIEW)
17.20 [0.677]
16
10 9
1
7 8
2.10 [0.100]
1.00 [0.039]
2.54 [0.100]
grid: 2.54 x 2.54 mm
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VLD25-SMT
│
DESCRIPTION:
LED DRIVER
date
11/01/2012
│
page
4 of 6
APPLICATION NOTES
1.
Digital Dimming Control
50% Duty Cycle
80% Duty Cycle
20% Duty Cycle
Output current
Output current(LED appears brighter)
Output current(LED appears dimmer)
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.
(DT-0.6)
I
o,norm
refers to the rated output current
I
o,set
=
I
o,nom
D refers to the pulse width of the PWM signal
T
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.
2.
Analog Dimming Control and Application Example
GND
0-10V
On/Off
(Optional)
1
5K1
VLD25-SMT
8
10
7
Last LED
1st LED
5K6
Ouput Current
+Vin
16
9
Analog Input Voltage
Voltage Control (0-15 V max.)
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VLD25-SMT
│
DESCRIPTION:
LED DRIVER
date
11/01/2012
│
page
5 of 6
3.
EMC Recommended Circuit
(Analog Dim)
EMI/RFI conducted EN55022 recommended circuit
1.25mH
+Vin
+
SMCG51
16
1.0uF
10
9
+Vout
470uF
2.2uF
VLD25-SMT
1
8
-
7
1.0uF
Vout
1st LED
GND
(P W M D im/O N /O FF)
Last LED
EMI/EMC recommended circuit
LCM
Vin
Tvs
C0
C1
C2
DIM
R1
V IN
VO+
+Vout
Load
VLD25-SMT
DI M
C3
GND
G ND
VO-
-Vout
1
Notes:
2
1. DIM pin is the module's PWM dimming pin
2. While adding circuit, it may extend the PWM dimming output reaction time
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