1. Ingeniería

Tiny version
Driver
- self made LED fixtures
- easy to use
- low cost
- dimming options
- battery supply
- CV supply
2015
Rev.O
Futuro
Lighting
design
LED Driver 150T
94% efficiency typical
Specification:
Topology: Buck
Vcc = 4,5-60 V DC
I LED = Adjustable
see next page for
setting options
Build your own LED fixture
Regulation / dimming:
- typical 3% output accuracy
- soft start capability
(just adding cap to PWM in)
- high speed PWM 20kHz max
- analog 0,7 - 2,5 V
- thermal foldback
Switching freq: 1 MHz max
Rsense ratio: 0,15 Ohm / 1 A
Dimensions: 20 x 17 x 5,2 mm
Weight: 1,8 g
Over temperature protection
Over current protection
99%
ILED = 0.56 A
98%
97%
47uF
+
+
Efficiency (%)
Hi: 2,6 - 5,5 V
Lo: -0,3 - 0,5 V
96%
95%
94%
93%
92%
6xLED (Vf=19 V)
91%
9xLED (Vf= 29 V)
11xLED (Vf=34 V)
90%
MCU
5V PWM
(or 0,7-2,5V
analog)
12xLED (Vf=39 V)
89%
40
41
42
43
44
45
46
47
48
49
50
Vcc (V)
I =18 uA
(VPWM=0)
Note: if PWM is not connected max ILED generated
Options: encapsulation, reverse protection, thermal
foldback
Futuro
Lighting
design
LED Driver 150T
LED current setting
98%
98%
ILED = 0,31A
ILED = 0,53A
97%
96%
96%
95%
95%
Efficiency (%)
Efficiency (%)
97%
94%
93%
92%
94%
93%
92%
91%
6xLED (Vf=19 V)
91%
6xLED (Vf=19 V)
90%
9xLED (Vf= 29 V)
90%
9xLED (Vf= 29 V)
11xLED (Vf=34 V)
89%
11xLED (Vf=34 V)
89%
12xLED (Vf=39 V)
88%
40
41
42
43
44
45
46
47
48
49
50
Vcc (V)
40
41
42
43
44
45
46
47
48
49
Vcc (V)
ILED
0,32 A
0,53 A
0,59 A
0,82 A
98%
ILED = 0,78A
97%
96%
95%
Efficiency (%)
12xLED (Vf=39 V)
88%
A
X
X
B
X
X
94%
X - linked by soldering iron
93%
92%
91%
Note: Vin is limited to 55 V max
for 0,32 A mode, for 0,59 and 0,82A
Driver needs to be thermally
connected to heatsink with LED module.
6xLED (Vf=19 V)
90%
9xLED (Vf= 29 V)
89%
11xLED (Vf=34 V)
12xLED (Vf=39 V)
88%
40
41
42
43
44
45
Vcc (V)
46
47
48
49
50
Futuro
Lighting
design
50
LED Driver 150T
Thermal foldback
Application Example
Back side:
LED driver
Connecting back side of LED driver
to fixture heatsink will protect LED
fixture against overheating thus
extending LED life time and provide
safe fixture operation even for
inappropriate installations.
Thermal foldback is temperature
of the module is set to ~80°C
Front side:
LED module
thermal connection can be done by
appropriate thermo conductive
both side tape or glue.
0,60
temperature
80
0,55
60
0,45
50
0,40
Temperature (°C)
LED current (A)
0,50
LED driver
70
Line regulation
LED count = 12x
Ta=24°C, Rh=61%
LED
module
thermal
connection
heatsink
LED current
40
0,35
0,30
30
0
100
200
300
time(sec)
400
500
600
Futuro
Lighting
design
LED Driver 150T
Analog Dimming example (local)
Appropriate for local dimming (Potentiomter close to Driver)
~2.43V
100%
57 % / V
47uF
+
+
60%
40%
~0,67V
Dimming level (%)
80%
20%
47k
LM285-2.5
2,5 V
0%
0,0
0,5
100k
LIN (LOG)
1,0
1,5
2,0
2,5
3,0
VDIMM (V)
* soft start capacitor
39k
M1*
0,7 V
Literature:
http://www.ti.com/lit/ds/symlink/lm385b-2.5.pdf
Potentiometer selection:
LIN - linear for linear dimming change
LOG - logarithmic change, more appropriate
for human eye response
Futuro
Lighting
design
LED Driver 150T
Analog Dimming example (remote)
Appropriate for remote dimming (1-10V dimmer)
100%
~10 V
13,3 % / V
Dimming level (%)
80%
47uF
+
+
60%
40%
0%
2k7
2.5 - 10 V
~2.5 V
20%
0,0
2,0
4,0
6,0
8,0
10,0
VDIMM (V)
7k5
4V7
0.5W
M1
M1 soft start capacitor
Signal selection:
LIN - linear for linear dimming change
LOG - logarithmic change, more appropriate
for human eye response
Futuro
Lighting
design
3-CH Digital dimmer for LED Driver 150T
Ready made solution for your lighting needs
Specification:
Supply voltage 30-60 V DC
Power consumption: 1,2 W max
Model: Custom for LED Driver 150
Output voltage 0,55 - 2,55 VDC
Outut current: 20 mA / channel max
Number of dimm steps: 250
Illumination: Front - Side Blue LED
End of range indication: blink (Blue)
Power-up fade-in duration: 30 sec
Setting memory type: EEPROM
Dimensions: 85 x 85 x 30 mm
Note: Implemented non isolated buck driver
may generate audiable noise, this is regular behaving
Futuro
Lighting
design
Available as bare PCB or end user product
3D model on request
Sunset:
Time: XX:YY
P = 0-90%
Dimm = 5-99
DIMM
Others:
- Reverse protection
- >3 days clock backup
Display: 2x16 lines
Actual time, status,
intensity, Menu
Illuminated (white)
Dimensions: 87x50x10 mm
LED-
AquaTimer
LED+
high
resolution
PWM
PWM
8:00
Futuro
Lighting
sunset
16:00
GND
Vcc
+
Intensity
+
Vcc
48V
sunrise
47uF
+12 VDC
Pmin
0:00
PWM frequency: 2000 Hz
Resolution: 1000 steps
Output: 5V / 10mA
Output: CV, 4A max
White
LED
3x
Pmax
Application example
Specification:
Supply Voltage: 6-25 VDC
Supply current: <15 mA
Power consumption: 0,65 W max
Clock source: RTC 24h
Settings for sunset and sunrise:
Start time XX:YY
Intensity 0-100%
Dimm time: 5-99 minutes
Sunrise:
Time: XX:YY
P = 10-100%
Dimm = 5-99
DIMM
Artificial sun for Aquarium life
LED Driver
AquaTimer & LED Driver 150T
time
23:59
design
TouchDIMM & LED Driver 150T
Available as bare PCB
3D model on request
Controll:
ON / OFF - short touch (<2sec)
Intensity decrease
Touch and hold till reaching required
intensity (initial status ON)
Application example
Specification:
Supply Voltage: 6-25 VDC
Supply current: <5 mA
Output: PWM / CV 4A max
PWM frequency: 2000 Hz
Resolution: 1000 steps
Output: 5V / 10mA
Dimm steps: 100
Dimming characteristic: Log
Dimensions:
50x13x10 mm
50x13x3.5 mm (wo DC con)
Others:
- Reverse protection
- implemented soft fade in and fade out
- illumination of touch button
- built in N-MOS for CV LED strips
TouchDIMM
LED+
high
resolution
PWM
PWM
+
47uF
+12 VDC
+
Vcc
48V
Indicator status
Inactive when off or during
fade in and out
LED
Driver
LED-
White
LED
6x
Intensity increase
Touch and hold till reaching required
intensity (initial status OFF)
Just single push to adjust
GND
Vcc
Futuro
Lighting
design