EN 55015 power port, CISPR22 Class B, 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
cui.com
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VLD25-DIP
│
DESCRIPTION:
LED DRIVER
date
11/28/2012
│
page
3 of 6
DERATING CURVE
Operating Temp.(
C
)
MECHANICAL
parameter
dimensions
case material
weight
conditions/description
0.898 x 0.402 x 0.535 inch (22.80 x 10.20 x 13.60 mm)
epoxy resin (UL94-V0)
4.3
g
min
typ
max
units
MECHANICAL DRAWING
unit: mm(inch)
Pin tolerances: ±0.10mm(±0.039inch)
General tolerances: ±0.25mm(±0.010inch)
7.62 [0.300]
2.54 [0.100]
2 2.80 [0.898]
17.78 [0.700]
10.20 [0.402]
4
3
2
1
5
(Bottom View)
6
10.20 [0.401]
0.50 [0.020]
9.50 [0.374]
Side View
4.10 [0.161]
∅
0.50 [0.020]
9.50 [0.374]
7.62 [0.300]
PIN CONNECTIONS
Pin
1
2
3
4
5
6
Function
Vin
analog dimming
ON/OFF/PWM
GND
-Vout
+Vout
1
2
3
4
5
6
RECOMMENDED FOOTPRINT (TOP VIEW)
1 7 .7 8 [0 .7 0 0 ]
∅
0.80 [0.031]
2 .5 4 [0 .1 0 0 ]
cui.com
2.54 [0.100]
For more information, please visit the
product page.
CUI Inc
│
SERIES:
VLD25-DIP
│
DESCRIPTION:
LED DRIVER
date
11/28/2012
│
page
4 of 6
APPLICATION NOTES
1.
Typical Application Circuits
(Analog Dimming Control)
(Analog Dimming Control)
2
+Vin
GND
+Vin
1
2
6
+Vout
VLD25-DIP
P TC
P TC
1
VLD25-DIP
6
+Vout
GND
4
3
5
-Vout 1st LED
Last LED
4
3
( PWM Di m/ON/O FF)
5
-Vout
1st LED
Last LED
(PWM D im/ON / OFF)
Series Application
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.
Parallel-series Application
2.
Digital Dimming Control
PWM Digital Control Signal
1
0
Output Curr ent
1
0
1
0
PWM Digital Control Signal
1
0
Output Current(LED appears bright)
PWM Digital Control Signal
Output Current(LED appears dim)
1
0
Formula for output current:
I
o,set
=
(DT-0.8)
T
I
o,nom
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: 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)
DSP 与 ARM 处理器
