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參數(shù)資料
| 型號(hào)： | D365A |
| 英文描述： | EL Drivers(EL驅(qū)動(dòng)器) |
| 中文描述： | EL驅(qū)動(dòng)（薩爾瓦多驅(qū)動(dòng)器） |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大小： | 324K |
| 代理商： | D365A |
6
I. Lamp Frequency Capacitor (CHF) Selection
Selecting the appropriate value of CHF capacitor will specify the inductor switching frequency (HF) and the lamp
frequency (LF) of the D365 EL driver. A divider circuit in the internal oscillator circuitry of the D365A divides the
inductor switching frequency by 72 to get the lamp frequency (LF = HF/72). Lamp frequencies of 200
–
500 Hz are
typically used for longer EL lamp life. Figure 1 graphically represents the effect of CHF capacitor value on the lamp
frequency oscillator at V+=3.3V. In this example at V+=3.3V, LF = 2000 nF-Hz/CHF.
Alternatively, a high frequency clock input may be connected to the CHF pin of the D365A to specify the output driver
frequency. The internal oscillator circuitry in the D365A divides the input clock frequency by 72 to get the output
frequency. Thus, for example, to get a 250Hz lamp frequency from a D365A, the input clock signal must be 18kHz.
The selection of the capacitor value can also affect the brightness of the EL lamp because of its control of LF and HF.
Although input voltage and lamp size can change EL lamp frequency as well, LF mainly depends on the CHF value
selected or the frequency of the input clock signal to CHF. Figure 2 shows typical brightness of a D365 circuit with
respect to lamp frequency on different EL lamp sizes. In this example, the supply voltage and inductor values were
kept constant while only varying frequency.
1
2
3
4
5
6
7
8
9
100
300
500
700
Lamp Frequency (Hz)
L
Figure 2: Luminance vs. Lamp Frequency
(V+ = 3.3V, Durel 3 Green EL Lamp)
Figure 1: Typical Lamp Frequency vs. CLF Capacitor
4in
2
6in
2
2in
2
0
200
400
600
800
1000
1200
1400
0
5
10
CHF (nF)
15
20
25
L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| D365A | Electroluminescent Lamp Driver IC |
| D370 | Digital Uncooled DFB（distributed-feedback） Laser Module(數(shù)字常溫DFB（分布式反饋）激光模塊) |
| D371A | EL Drivers(EL驅(qū)動(dòng)器) |
| D371A | Electroluminescent Lamp Driver IC |
| D371 | Digital Uncooled DFB（distributed-feedback） Laser Module(數(shù)字常溫DFB（分布式反饋）激光模塊) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| D-365F | 制造商:Triad Magnetics 功能描述: |
| D365MS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IN-PHASE 4-WAY DIVIDERS/COMBINERS, POWER SMA/TYPE N 0.5-18 GHz |
| D3660 | 制造商:Dagnall Electronics 功能描述:TRANSFORMER 50VA 10V |
| D3660 | 制造商:Dagnall Electronics 功能描述:TRANSFORMER 50VA 10V |
| D3661 | 制造商:Dagnall Electronics 功能描述:TRANSFORMER 50VA 2 X 12V |
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