JPH0257600U - - Google Patents
Info
- Publication number
- JPH0257600U JPH0257600U JP13681088U JP13681088U JPH0257600U JP H0257600 U JPH0257600 U JP H0257600U JP 13681088 U JP13681088 U JP 13681088U JP 13681088 U JP13681088 U JP 13681088U JP H0257600 U JPH0257600 U JP H0257600U
- Authority
- JP
- Japan
- Prior art keywords
- current
- light bulb
- iclamp
- icmax
- switching means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
Description
第１図は本考案の白熱電球駆動装置の回路ブロ
ツク図、第２図は定電流素子の電圧電流特性を示
す説明図、第３図ａ〜ｃは第１図の回路による白
熱電球の点灯後に現れる各部の電気的変化の様子
を示す模式図、第４図は従来の白熱電球駆動装置
の回路ブロツク図、第５図ａ〜ｃは第４図の回路
による白熱電球の点灯後に現れる各部の電気的変
化の様子を示す模式図である。
１……ＰＷＭコントローラ、２……バツフア用
トランジスタ、３……出力トランジスタ、４……
逆起電力吸収ダイオード、５……ハロゲンランプ
（白熱電球）、６……定電流素子。
Figure 1 is a circuit block diagram of the incandescent lamp drive device of the present invention, Figure 2 is an explanatory diagram showing the voltage-current characteristics of the constant current element, and Figures 3 a to c are after the incandescent lamp is lit by the circuit in Figure 1. A schematic diagram showing how electrical changes occur in each part. Figure 4 is a circuit block diagram of a conventional incandescent lamp drive device. Figures 5 a to c show electricity in each part that appears after the incandescent lamp is lit by the circuit in Figure 4. FIG. 1... PWM controller, 2... Buffer transistor, 3... Output transistor, 4...
Back electromotive force absorption diode, 5...Halogen lamp (incandescent light bulb), 6... Constant current element.
Claims (1)
介して電源を供給し、前記白熱電球の定常電流を
ＩＣＬＡＭＰ、前記電流制限手段の制限電流ＩＬ
、前記スイツチング手段の最大電流をＩＣＭＡＸ
としたとき、ＩＣＬＡＭＰ＜ＩＬ＜ＩＣＭＡＸな
る関係を有する白熱電球駆動装置。 Power is supplied to the incandescent light bulb via current limiting means and switching means, the steady current of the incandescent light bulb is ICLAMP, and the limiting current IL of the current limiting means is
, the maximum current of the switching means is ICMAX
An incandescent lamp driving device having the relationship ICLAMP<IL<ICMAX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13681088U JPH0257600U (en) | 1988-10-20 | 1988-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13681088U JPH0257600U (en) | 1988-10-20 | 1988-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0257600U true JPH0257600U (en) | 1990-04-25 |
Family
ID=31397666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13681088U Pending JPH0257600U (en) | 1988-10-20 | 1988-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0257600U (en) |
-
1988
- 1988-10-20 JP JP13681088U patent/JPH0257600U/ja active Pending
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