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參數(shù)資料
| 型號： | IRPLLNR3 |
| 廠商： | International Rectifier |
| 英文描述： | Universal Input Linear Fluorescent Ballast using the IR2167 |
| 中文描述： | 通用輸入線性熒光燈鎮(zhèn)流器用IR2167 |
| 文件頁數(shù)： | 11/27頁 |
| 文件大?。?/td> | 341K |
| 代理商： | IRPLLNR3 |
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11
RPLLNR3
The duration of the Preheat mode as well as the mode of operation of the ballast are determined by
the voltage on the CPH pin of the IR2167. At the completion of the UVLO mode, Preheat mode is
entered and an internal current source is activated at the CPH pin of the IR2167, which begins to
charge up capacitor CPH. The ballast remains in the Preheat mode until the voltage on the CPH pin
exceeds the Ignition Ramp mode threshold (4V).
Ignition Ramp Mode
At the completion of the Preheat mode (4V < CPH pin < 5.1V) the ballast switches to the Ignition
Ramp mode and the frequency ramps down to the ignition frequency. The frequency ramping is
accomplished by turning off the internal open drain MOSFET on the RPH pin of the IR2167 (see
IR2167 block diagram). Resistor RPH is no longer connected directly in parallel with resistor RT. The
shift in frequency does not occur in a step function but rather with an exponential decay because of
capacitor CRAMP in series with resistor RPH to COM. The duration of this frequency ramp is
determined by the time constant of the RC combination of capacitor CRAMP and resistor RPH. The
minimum frequency of oscillation occurs at the end of this ramp and is determined by resistor RT and
capacitor CT. During this ramping downward of the frequency, the voltage across the lamp increases
in magnitude as the frequency approaches the resonant frequency of the LC load circuit until the
lamp ignition voltage is exceeded and the lamp ignites. Figure 7 shows the ramping of voltage appear-
ing across the lamp. Note that the sudden drop in lamp voltage indicates that the lamp has ignited.
Figure 5:
Typical lamp voltage at startup:
f
Startup
= f
Preheat
Figure 6:
Improved lamp voltage at startup:
f
Startup
> f
Preheat
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IRPLLNR4 | 功能描述:BALLAST UNIV INP FLUOR IR2166 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:MCU 適用于相關(guān)產(chǎn)品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、纜線、軟件、數(shù)據(jù)表和用戶手冊 其它名稱:520-1035 |
| IRPLLNR5 | 功能描述:電源管理IC開發(fā)工具 Uni Inpt Lin Fluor Ballast 54W TL5 Lamp RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| IRPLLNR7 | 功能描述:電源管理IC開發(fā)工具 Flourescent Ballast Using IRS2166DPBF RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| IRPLMB1E | 功能描述:KIT DESIGN BALLAST 220VAC RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:MCU 適用于相關(guān)產(chǎn)品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、纜線、軟件、數(shù)據(jù)表和用戶手冊 其它名稱:520-1035 |
| IR-POST-B | 制造商:Knoll Systems 功能描述:Single Target IR Repeater Kit with Black Postage Stamp Receiver 制造商:KNOLL SYSTEMS 功能描述:IR REPEATER COMPLETE KIT BLACK POSTAGE STAMP RECEIVER |
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