1DDD356AA-K01 データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

メーカー

1DDD356AA-K01

Electroluminescent Lamp Driver IC

Unspecified 

Designing With D356A

I. Lamp Frequency Capacitor (CLF) Selection

Selecting the appropriate value of capacitor for the low frequency oscillator (CLF) will set the output frequency of the

D356A inverter. Figure 1 graphically represents the inversely proportional relationship between the CLF capacitor

value and the oscillator frequency. In this example at V+ = 3.0V, LF=1600 nF-Hz/CLF.

900

800

700

600

500

400

300

200

100

0

0 1 2 3 4 5 6 7 8 9 10

CLF (nF)

Figure 1: Typical Lamp Frequency vs. CLF Capacitor

Alternatively, the lamp frequency may also be controlled with an external clock signal with a 50% duty cycle. The

output lamp frequency will be the same frequency as the input clock signal. For example, if a 250Hz input clock signal

is used, the resulting lamp frequency will be 250Hz. The clock signal input voltage should not exceed V+.

The selection of the CLF value can also affect the brightness of the EL lamp because of its control of the lamp

frequency (LF). Although input voltage and lamp size can change EL lamp frequency as well, LF mainly depends on

the CLF value selected or the frequency of the input clock signal to CLF. The luminance of various sizes of Durel 3

Blue-green EL lamp driven by a D356A at V+ = 3.0V using the same inductor value is shown in Figure 2 with respect

to lamp frequency.

8

7

6

5

2in2 EL Lamp

4

4in2 EL Lamp

3

2

6in2 EL Lamp

1

0

0

200

400

600

800 1000

Lamp Frequency (Hz)

Figure 2: Typical Lamp Luminance vs. Lamp Frequency

6

Share Link: