- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366561 > AN47 (Zetex Semiconductor) Getting more out of the ZXLD1350 - dimming techniques PDF資料下載
參數(shù)資料
| 型號： | AN47 |
| 廠商： | Zetex Semiconductor |
| 英文描述： | Getting more out of the ZXLD1350 - dimming techniques |
| 中文描述： | 獲取更多的ZXLD1350的-調(diào)光技術(shù) |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 230K |
| 代理商： | AN47 |
AN47
Issue 1 - August 2006
Zetex Semiconductors plc 2006
5
www.zetex.com
Resistor dimming
By connecting a variable resistor between ADJ and GND, simple dimming can be achieved.
Capacitor C
ADJ
is optional for better AC mains interference and HF noise rejection. Recommend
value of C
ADJ
is 0.22 F.
GND
ZXLD1350
ADJ
GND
R
ADJ
R
S
*C
ADJ
The current output can be determined using the equation:
I
OUT
0.08 R
R
ADJ
------------------------------------------------
200k
+
(
)
=
Note that continuous dimming is not possible with a resistor. At some point the shutdown
threshold will be reached and the output current reduced to zero. This can occur below 300mV.
Note that a 1M resistor will load the V
REF
on the ADJ pin. The V
REF
will now be divided down by
the nominal 200k V
REF
resistance and the 1M R
ADJ
. The nominal voltage will now be
approximately 1V. R
S
will need to be adjusted to set the maximum current.
The +/20% tolerance of the input resistance should also be understood. See table below:
Table 1
R
ADJ
k
Rint nom.
k
Rint min.
k
Rint max.
k
V
ADJ
nominal
% error
from
nominal
Due to
Rint min.
% error
from
nominal
Due to
Rint max.
1000
200
160
240
1.041
3.4%
-3.3%
500
200
160
240
0.892
6.1%
-5.7%
200
200
160
240
0.625
11.1%
-10.0%
100
200
160
240
0.416
15.4%
-13.3%
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ANNE-50X | Termination SMA 50з DC to 20 GHz |
| AO4405 | Circular Connector; No. of Contacts:26; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:17-26 RoHS Compliant: No |
| AO4405L | Circular Connector; No. of Contacts:26; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:17-26 RoHS Compliant: No |
| AO4406 | N CHANNEL ENHANCEMENT MODE FIELD EFFECT TRANSISTOR |
| AO4408 | Circular Connector; No. of Contacts:26; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:17-26 RoHS Compliant: No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN-470 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Taking Advantage of ECL Minimum-Skew Clock Drivers |
| AN470A2-2.5 | 制造商:AN# - MILITARY 功能描述: |
| AN470AD3-2 | 制造商:AN# - MILITARY 功能描述: |
| AN470AD8-10 | 制造商:AN# - MILITARY 功能描述: |
| AN481-3 | 制造商:AN# - MILITARY 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。