参数资料
| 型号： | IRPLCFL3 |
| 厂商： | International Rectifier |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | KIT DESIGN CFL TRIAC DIMMING |
| 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： | *IRPLCFL3 |
IRPLCFL3
In this system the front end of the ballast has been designed so that when the triac in
the dimmer has fired, it will remain on continuously until almost the end of the mains
half-cycle. In addition to this there is circuitry that detects the firing angle of the triac and
adjusts the lamp current by increasing the switching frequency hence the controlling
light output depending on the level set by the dimmer.
It should be noted that if the dimmer is set too low the triac will never fire when a
capacitive load is connected and also when the ballast is running and the dimmer is
turned too low there will be insufficient bus voltage for the ballast to be able to operate.
Because of these factors it is impossible for the ballast to operate over the complete
range of adjustment of the dimmer. There will also be some hysteresis so when the
ballast is being dimmed down and reaches the point where the lamp goes out, the
dimmer has to be turned back up some way before the lamp will strike again.
BLOCK DIAGRAM
Triac Based
Doubler and Charge Pump
Control Stage
Output Stage
Lamp
Domestic Dimmer
(with auxilary filament
heating windings)
NC
VCC
VDC
RT
RPH
CT
1
2
3
4
5
6
14
13
12
11
10
9
VB
HO
VS
LO
CS
SD
Triac firing point sense
CPH
7
8
COM
Lamp Arc Current Sense
FUNCTIONAL DESCRIPTION
When the dimmer triac is fired the current that flows must remain above the holding
current until a point close to the end of the mains half cycle at which the voltage is very
low. This is achieved by ensuring that the ballast draws current exceeding the holding
current of a standard power triac as used in most dimmers with a charge pump circuit
consisting of C5 and C6 in conjunction with D1 to D4 (not to be confused with the
charge pump that supplies the Vcc). When the ballast is operating the point between L2
and C15 swings low when Q2 is on, this charges C5 through D2 during the positive half-
cycle of the mains voltage. When Q2 switches off and Q1 switches on the voltage
between L2 and C15 swings high causing C6 to be discharged through D1 into the
storage capacitor C3. During the negative half-cycle of the mains voltage, the opposite
happens with C6 and C4. The result is that a continuous series of current pulses are
drawn from the input during the period when the triac has been fired until close to the
end of the mains half-cycle. The inductor L1 ensures that a continuous current is drawn
from the input and that the triac does not switch off between pulses. In order to do this
the inductor must store energy when current is being drawn via the charge pump and
release this energy during the period when C5 or C6 is discharging. When the ballast is
dimmed the frequency increases and so the current in C5 or C6 also increases,
ensuring that there will be sufficient to keep the triac switched at all dim levels.
3
相关PDF资料 |
PDF描述 |
|---|---|
| IRPLCFL4 | IC BALLAST DIMMING CFL 3-WAY |
| IRPLCFL5E | KIT DESIGN CFL BALLAST 220VAC |
| IRPLCFL5U | KIT DESIGN CFL BALLAST 120VAC |
| IRPLCFL8U | KIT DES FLUOR BALLAST IRS2530D |
| IRPLDIM1U | BALLAST DIMMING 32W/T8 120VAC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRPLCFL4 | 功能描述:IC BALLAST DIMMING CFL 3-WAY RoHS:否 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| 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 |
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