전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

UCY2G150MPD 데이터시트(PDF) 4 Page - Diodes Incorporated

부품명 UCY2G150MPD
상세설명  High Power Factor LED Replacement T8 Fluorescent Tube
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  DIODES [Diodes Incorporated]
홈페이지  http://www.diodes.com
Logo DIODES - Diodes Incorporated

UCY2G150MPD 데이터시트(HTML) 4 Page - Diodes Incorporated

  UCY2G150MPD Datasheet HTML 1Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 2Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 3Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 4Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 5Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 6Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 7Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 8Page - Diodes Incorporated UCY2G150MPD Datasheet HTML 9Page - Diodes Incorporated Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 12 page
background image
AN75
Issue 1 – January 2011
4
www.diodes.com
© Diodes Incorporated 2010
It is advisable to keep below the maximum switching frequency f
swi(max) below 150kHz to avoid
excessive switching loss.
Inductor selection and setting the LED current
The fixed off-time architecture of the AL9910 regulates the average current through the inductor L
BUCK.
The value of L
BUCK depends on the desirable peak-to-peak ripple ΔIL in the output LED current. LBUCK
can be set with the following equation,
mH
6
.
6
mA
115
s
μ
9
.
13
V
54
I
t
V
L
L
OFF
)
nom
(
LED
BUCK
=
×
=
Δ
×
=
Due to diameter limitation of the T8 tube, L
BUCK is made up of L3 and L4 as shown in Figure 1.
The AL9910 constant off-time control loop regulates the peak inductor current I
pk. As the average
inductor current equals the average LED current, the average LED current can be regulated by
controlling I
pk.
Given a fixed inductor value, the change in the inductor current over time is proportional to the voltage
applied across the inductor. During the off-time, the voltage seen by the inductor is the LED stack
voltage. So, the peak inductor current should be regulated to,
mA
297
mH
6
.
6
s
μ
9
.
13
V
54
5
.
0
mA
240
L
t
V
5
.
0
I
I
BUCK
OFF
)
nom
(
LED
)
nom
(
LED
pk
=
×
×
+
=
×
×
+
=
The peak current is constant and set by the sense resistor R
SENSE. If the LD pin is tied to the VDD pin,
the value of R
SENSE can be easily calculated because the voltage threshold on the CS pin is 0.25V,
Ω
=
=
84
.
0
mA
297
25
.
0
RSENSE
In the circuit shown in Figure 1, R
SENSE consists of R5, R6 and R7.
The peak current rating of the L
BUCK should be greater than Ipk and the RMS current rating of the
inductor should be at least 110% of I
LED(nom).
Although the described solution, working in fixed off-time and Continuous Conduction Mode (CCM),
works as a constant current source, a limitation to the output LED current accuracy is its dependency
on the number of LEDs and overall LED chain voltage. The best result can be achieved using a fixed
number of LEDs. A variable number of LEDs results in reduced current precision.
The two extremes of the output LED current can be approximated as,
mA
234
mH
6
.
6
s
μ
9
.
13
V
59
5
.
0
-
mA
97
2
L
t
V
5
.
0
-
I
I
BUCK
OFF
(max)
LED
pk
LED(min)
=
×
×
=
×
×
=
mA
253
mH
6
.
6
s
μ
9
.
13
V
42
5
.
0
-
mA
97
2
L
t
V
5
.
0
-
I
I
BUCK
OFF
(min)
LED
pk
LED(max)
=
×
×
=
×
×
=
The above equation shows that the precision of the LED current also depends on the tolerance of
practical inductor L
BUCK. Inductor with tolerance rating equal or less than 10% should be chosen to
ensure good LED current precision at mass production.
Power MOSFET calculation
The power MOSFET is chosen based on maximum voltage stress, peak MOSFET current, total power
losses, maximum allowable working temperature and the gate driver capability of the AL9910.


유사한 부품 번호 - UCY2G150MPD

제조업체부품명데이터시트상세설명
logo
Nichicon corporation
UCY2G180MPD NICHICON-UCY2G180MPD Datasheet
60Kb / 2P
   ALUMINUM ELECTROLYTIC CAPACITORS
More results

유사한 설명 - UCY2G150MPD

제조업체부품명데이터시트상세설명
logo
Shenzhen Huazhimei Semi...
HM7162AL HMSEMI-HM7162AL Datasheet
1Mb / 13P
   T5/T8 series LED fluorescent tube
logo
Ningbo Foryard Optoelec...
FYT8-3528UW-B-288 FORYARD-FYT8-3528UW-B-288 Datasheet
552Kb / 5P
   T8 LED tube
FYT8-5050UW3-B-96 FORYARD-FYT8-5050UW3-B-96 Datasheet
489Kb / 5P
   T8 LED tube
logo
P-tec Corporation
E68I P-TEC-E68I Datasheet
208Kb / 2P
   E68i T8 LED Tube
I38I P-TEC-I38I Datasheet
1,019Kb / 7P
   I38i T8 LED Tube
E48I P-TEC-E48I Datasheet
765Kb / 8P
   E48i T8 LED Tube
PLSO-T8AG5-WXXXX-60 P-TEC-PLSO-T8AG5-WXXXX-60 Datasheet
580Kb / 2P
   G5 IPS LED T8 TUBE
PLSO-T8AG4-WXXXX-60 P-TEC-PLSO-T8AG4-WXXXX-60 Datasheet
570Kb / 2P
   G4 IPS LED T8 TUBE
PLSO-T8AG33000-120 P-TEC-PLSO-T8AG33000-120 Datasheet
201Kb / 2P
   G3 Series LED T8 Tube
logo
OSRAM GmbH
QTP81X36 OSRAM-QTP81X36 Datasheet
52Kb / 2P
   QUICKTRONIC짰PROFESSIONAL T8 ECG for T8/26mm fluorescent lamps
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com