Acrich FAQ

FAQ
1. Certification
-Our primary concern about Acriche is safety issue because of high voltage operation.
- Our material which is used in Acriche (PCB, connector, resistor, wire) is approved by
UL.
- Acriche is approved by CE & TUV in November 2007.
- We are also proceeding UL certification about Acriche.
We expect to get approval in the first half of year 2008
2. About flicker
- Flicker is phenomenon that people can recognize the fluctuation of brightness.
- In the conventional lamp, flicker occurs when the light source is old or when the
ballast
or input voltage condition is not good.
- Acriche operates by AC 50~ 60 Hz, but it turns on and off 100~120 times a sec,
so human can’t feel flicker.
1
FAQ
3. Electrostatic, Surge, Insulation Voltage or EMC
- With 4KV electrostatic discharge(EN61000-6-1 standard), it shows normal operating
property (Criterion A)
- With 1KV surge, during the test, Acriche flickered temporarily, but it was recovered
after test by itself (Criterion B)
- In case of insulation voltage test, Emitter type is 2000V and PCB type is 6000V.
- About EMC Test, there is no EMI problem from Acriche and there is no EMS problem.
4. Rated current
- A rated current of Acriche emitter is 20mA RMS. RMS (root mean square) is way
to express energy amount of AC source.
- Current in Acriche is varied by input voltage from AC source.
If over current occurs from over voltage, it can destroy Emitter or resistor.
2
FAQ
5. PCB
- In Acriche, there is no limitation about using PCB.
- We just recommend to use Acriche with Tj 90℃ below. If Tj is lower, the lifetime
would be longer.
- We don’t recommend to use FR4 PCB If there isn’t special thermal management
system.
- To design a PCB for Acriche, refer to the foot print in the spec.
- Check a insulation voltage of PCB.
f
3
FAQ
6. Collimator
< A2 Collimator >
- designed for AW2214
20
˚
35
˚
- 15 ~ 35 ˚ Viewing angle
- 24.7x15.7 mm
- 200~500 lx
15
˚
< A3 Collimator >
- rayset data is available in the marketing team
- Now developing
- 1Q. 08 Sample available
- Around 37x20 mm
4
FAQ
7. About voltage fluctuation
- As input voltage changes, current and brightness of Acriche also change.
When input voltage changes 10%, current and light output change about 25%.
- In voltage vs current graph, as voltage varies from 230V to 260V, current
changes from 20mA to 26mA.
- In unstable voltage application, we can reduce current fluctuation and power
consumption by using PTC (Positive Thermal Coefficient)
35
40
powe(W)
20
40
30
PF
15
10
Current(mA)
25
50
230V
Current [RMS , mA]
30
Current(mA)
20
20
10
200V resister
200V VR
230V resister
230V VR
260V resister
260V VR
10
5
0
150
30
0
0
200
250
300
50
100
150
200
Voltage [RMS , V]
<Acriche datasheet>
250
0
0
10
20
30
40
50
60
70
80
90
Time(min)
<Input Voltage vs Current>
5
FAQ
8. High Input Voltage test
< AW2214 >
Input voltage
[V] RMS
110
150
180
200
220
230
240
Current
[mA] RMS
20
46.6
66.7
73.8
93.8
100.5
107.5
start to smoke from resistor
< AW3211 >
Input voltage
[V] RMS
90
100
110
120
130
140
150
160
170
180
200
220
19.8
31.9
42.6
43.4
44.5
49.0
53.9
59.2
64.3
69.2
84.1
-open
17.2
29.7
44.1
59.8
76.7
94.6
112.4
-open
32
44.4
58.5
64.7
72.3
79.8
90.9
102.1
30.5
42.3
58.6
78.1
100.6
126.8
157.2
-open
PTC
Current
[mA] RMS
resistor
114.3
125.2
152.7
-open PTC
Temp
[℃]
resistor
- Temp : board temperature [℃]
- The product with PTC is more stable for high input voltage condition
- Test result could be different according to type of resistor, heat sink and ambient temperature
6
FAQ
< AW3221 >
Input voltage
[V] RMS
200
210
220
230
240
250
260
270
280
290
300
14.5
18.1
21.7
24.5
21.7
22.1
23.1
24.3
25.5
27.1
28.5
PTC
14.1
17.5
20.9
24.5
28.2
32.0
35.9
39.9
44.1
48.3
52.5
resistor
36.9
48.7
59.4
68.7
69.8
73.0
76.5
81.1
86.8
91.2
97.0
PTC
38.6
49.7
59.4
68.2
77.9
87.8
98.2
109.2
121.8
135.5
148.2
resistor
Current
[mA] RMS
Temp
[℃]
-Temp : board temperature [℃]
- No open below 300V (Our max supplying voltage)
- Test result could be different according to type of resistor, heat sink and ambient temperature
7