收藏本站
参数资料
型号： IRPLCFL3
厂商： International Rectifier
文件页数： 7/12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
Component Selection
The output inductor and capacitor values should be chosen for the ballast to allow it to
run at maximum brightness around 40kHz. This will minimize losses in the inductor. For
this example the IR Ballast Design Assistant software has been used to select the
required preheat, ignition and run frequencies for a TC-DEL 26W lamp giving an L of
2.3mH and C of 6.8nF. In this circuit the two capacitors C5 and C6 add to the tank
capacitance so in practice a 4.7nF output capacitor is sufficient. The values of R16, R17
and C9 have been calculated to give a preheat frequency of 55kHz and a run frequency
of 40kHz. The ignition frequency will be around 45kHz.
Output Inductor Design
The output inductor L2 should be designed to allow a high peak ignition current without
saturating. This is important as the IR2156 shutdown will be triggered if the inductor
saturates. The ignition current depends on the type of lamp being used and must be
kept to a minimum by ensuring the preheat is correct. To minimize losses in the inductor
multi-stranded wire should be used in combination with Ferrite cores of sufficiently good
quality. The best approach to design is to wind as many turns as possible of multi-
stranded wire and have the largest gap possible to achieve the correct inductance. This
will produce the highest available peak current before saturating the inductor. It is
important to bear in mind that when the cores are hot the saturation point and hence the
peak current for the inductor will be lower therefore a poorly designed inductor may
result in the ballast shutting down during an attempted hot re-strike.
Lamp Preheating
The lamp must be sufficiently preheated before ignition. The correct preheat current can
be determined from published data or from International Rectifiers Ballast Design
Assistant software.
The preheat time can be set by adjusting the value of C10. As a general rule the lamp
filament should glow red before ignition. If preheat is insufficient the ballast is likely to
shutdown during ignition because the output inductor will be unable to operate at the
high current required. The number of turns in the auxiliary cathode windings of the
output inductor L2 should be chosen to provide sufficient preheat. In designs for ballasts
with integral lamps the shutdown pin can be grounded so that the inductor may saturate
without shutting down the circuit.
The lamp filament (Cathode) resistance over the range of dimming levels must be
between 3 and 5.5 times the resistance when cold. A simple method for determining the
hot resistance is to first connect one cathode to a DC power supply via an ammeter and
slowly increase the voltage from zero, noting the current at 1V intervals. This should be
done until the cathode can be seen to be glowing red. When this occurs the voltage
should not be increased further in order to prevent possible cathode damage. The
resistance can then be calculated for each voltage and hence the acceptable voltage
range can be found to comply with the 3 to 5.5 times cold resistance, which can be
easily measured with a DMM.
7
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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*