参数资料
| 型号： | IRPLCFL4 |
| 厂商： | International Rectifier |
| 文件页数： | 5/12页 |
| 文件大小： | 0K |
| 描述： | IC BALLAST DIMMING CFL 3-WAY |
| 标准包装： | 1 |
| 主要目的： | 照明，镇流器控制 |
| 已用 IC / 零件： | IR2156 |
| 已供物品： | 板，文档 |
| 相关产品： | IR2156SPBFDKR-ND - IC CONTROLLR BALLAST 600V 14SOIC IR2156SPBF-ND - IC CTRLR BALLAST 600V .5A 14SOIC IR2156SPBFCT-ND - IC CONTROLLR BALLAST 600V 14SOIC IR2156SPBFTR-ND - IC CONTROLLR BALLAST 600V 14SOIC IR2156PBF-ND - IC CONTROLLER BALLAST 600V 14DIP IR2156STR-ND - IC BALLAST CONT 600V .5A 14-SOIC IR2156-ND - IC CNTL BALLAST 600V 0.5A 14-DIP IR2156S-ND - IC CNTL BALLAST 600V 0.5A 14SOIC |
| 其它名称： | *IRPLCFL4 |
IRPLCFL4
To obtain 50% output the frequency would have to be very precisely set. This is not practical since
the tolerances of the output inductor, capacitor and oscillator timing components do not allow this.
Even if each ballast was individually adjusted in production variations in lamp behavior over tempera-
ture would mean that under some conditions the lamp arc would extinguish at this setting leaving the
system in permanent preheat which would burn out the cathodes eventually.
This explains why the 150VDC bus solution has been adopted as this allows 50% output to be
achieved without this problem. However the disadvantages discussed in the previous section demon-
strate that this approach is not without some major disadvantages.
Consequently it becomes necessary to include a closed loop feedback system that controls the lamp
current by adjusting the ballast frequency from a VCO (voltage controlled oscillator) driven by the
output of an error amplifier that senses the lamp arc current directly and compares it with a refer-
ence. This same strategy has been used in the IRPLCFL3 reference design “A Ballast that can be
dimmed from a domestic (phase cut) dimmer” and has been demonstrated to be capable of control-
ling the lamp output down to levels below 10% with very good stability. This also compensates for any
tolerances in the components of the circuit or the lamp.
Regulated Lamp Current Control System
VCO
&
DRIVER
∑
+
Lamp Arc Current
Reference
www.irf.com
-
5
相关PDF资料 |
PDF描述 |
|---|---|
| IRPLCFL5E | KIT DESIGN CFL BALLAST 220VAC |
| IRPLCFL5U | KIT DESIGN CFL BALLAST 120VAC |
| IRPLCFL8U | KIT DES FLUOR BALLAST IRS2530D |
| IRPLDIM1U | BALLAST DIMMING 32W/T8 120VAC |
| IRPLDIM2E | KIT BALLAST DIM DIG 230VAC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRPLCFL5E | 功能描述:KIT DESIGN CFL BALLAST 220VAC RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| IRPLCFL5U | 功能描述:KIT DESIGN CFL BALLAST 120VAC RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
| IRPLCFL7U | 制造商:International Rectifier 功能描述:9999V 999.000A OTHER - Boxed Product (Development Kits) |
| IRPLCFL8U | 功能描述:电源管理IC开发工具 3 lvl Dim CFL Fluor Ballast w/IRS2530D RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRPLCFL9U | 功能描述:电源管理IC开发工具 3 lvl Dim CFL Fluor Ballast Ref dsgn RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。