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參數(shù)資料
| 型號： | D305A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Electroluminescent Lamp Driver IC |
| 中文描述： | 電致發(fā)光燈驅(qū)動IC |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 401K |
| 代理商： | D305A |
II. Controlling EL Brightness through Clock Pulse Width Modulation (Option 1)
Pulse width modulation of the external LF input signal may be used to regulate the brightness of the EL
lamp. Figures 4, 5, and 6 below demonstrate examples of the D305A output waveform with pulse width
modulation of the LF input signal. As the positive duty cycle of the LF input signal is increased from 15% to
100%, the charging period of the output waveform decreases, and the peak voltage of the output waveform
also decreases towards zero output. Therefore, incremental dimming occurs as a result of the wave-shaping
changes. This scheme may also be used inversely to regulate lamp brightness over the life of the battery or
to compensate for lamp aging. Figure 7 shows a typical dimming curve with this technique. Operation at
duty cycles lower than 10% is not recommended. Clocking frequency can range from 400 Hz to 2000 Hz.
The maximum amplitude of the clock signal may range from 1.0V to Vcc.
Va
Cs
Vb
E
Vcc
L
GND
Rf
CLF
CHF
D305A
1
2
3
4
5
10
9
8
7
6
OFF
ON
2.2 nF
(200 V)
10 k
3.0 V
BAS21
EL Lamp
800 Hz
15% to 100%
positive duty PWM
1.0V Min
0.2V Max
1.0V Min
0.2V Max
27 KHz
15% + duty
Figure 4: LF Input Duty Cycle = +15%
Figure 5: LF Input Duty Cycle = +50%
Figure 6: LF Input Duty Cycle = +75%
10
Figure 7: Dimming through LF Clock Input Duty Cyle
0
2
4
6
8
10
12
14
16
18
20
0%
10%
20%
30%
LF Clock Input Duty Cycle
40%
50%
60%
70%
80%
90%
100%
L
0
20
40
60
80
100
C
Luminance
Current
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| D306A | Electroluminescent Lamp Driver IC |
| D30E60 | Fast Switching EmCon Diode |
| D30L60 | CAP 100PF 200V 10% X7R RAD.20 .20X.20 TR-16 M-MIL-PRF-39014 STANDOFF |
| D30SC4 | Schottky Rectifiers (SBD) (40V 30A) |
| D30SC4M | Schottky Rectifiers (SBD) (40V 30A) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| D305EWA | 功能描述:LED 顯示器和配件 Orange Dual 7 Segment RoHS:否 制造商:Avago Technologies 顯示器類型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長:628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| D305RP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Short Circuit Protected Regulated, 3W SIP DC/DC Converters |
| D305RW | 制造商:MPD 制造商全稱:MicroPower Direct, LLC 功能描述:Single & Dual Output 3W SIP, Wide Input DC/DC Converters |
| D30-6 | 制造商:Visual Communications Company (VCC) 功能描述:T-1 1/4 Bi-Pin Lamp |
| D-306-03 | 功能描述:熱收縮管和套管 D-306 SER 8.76MM RoHS:否 制造商:3M Electronic Specialty 類型:Tubing 材料:Polyolefin, Flexible 顏色:Clear 最低收縮溫度:+ 100 C 恢復(fù)直徑: 長度:100 ft 內(nèi)徑:1.5 in 收縮率:2:1 |
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