参数资料
| 型号： | IRPLDIM3 |
| 厂商： | International Rectifier |
| 文件页数： | 22/27页 |
| 文件大小： | 0K |
| 描述： | KIT DES FLUOR BALLAST IRS2158D |
| 标准包装： | 1 |
| 主要目的： | 照明，镇流器控制 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | IRS2158D |
| 主要属性： | 28W TL5，可调光，PFC，灯开路、使用寿命结束和断电保护 |
| 次要属性： | 点火预热 |
| 已供物品： | 板，CD |
| 相关产品： | IRS2158DSPBF-ND - IC DVR HALF BRIDGE 600V 16-SOIC IRS2158DPBF-ND - IC DVR HALF BRIDGE 600V 16-PDIP IRS2158DSTRPBF-ND - IC BALLAST CTRL 600V 16-SOIC |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页
1.
2.
3.
4.
5.
6.
7.
The signal ground (pin 12) should only be connected to the power ground at one single point to
prevent ground loops from forming.
The point described in (1) should be where the grounds of the current sense resistors for both the
half bridge MOSFETs and the lamp current feedback both meet.
The VCC decoupling capacitor should be placed as close to the IRS2158D VCC (pin 13) and
COM (pin 12) as possible with the shortest possible traces.
The devices; CPH, RMIN, CVCO, CT and CCS should all be located as close to the IRS2158D as
possible with traces to the relevant pins being as short as possible.
The ground connections from the devices listed in (4) should be connected back to the COM pin
of the IRS2158D through the shortest possible traces. These should be connected back to the
COM pin of the IC without joining the power ground trace at any point. In the example shown
above the power ground trace runs along the lower side of the board on the bottom Copper layer
The charge pump diode connection to ground should be made to the power ground not the signal
ground.
The power factor correction section (if used) should be kept apart from the ballast control as
shown in the example above. the power factor correction section is at the left side of the PCB.
Output Inductor Design
The output inductor LRES should be designed to allow a sufficient peak ignition current without
saturating. This is important as the ballast will be unable to ignite if unable to deliver sufficient voltage at
the lamp. The ignition current depends on the type of lamp being used and must be kept to a minimum by
ensuring that the cathodes are sufficiently preheated. To minimize eddy current losses in the inductor
windings multi-stranded wire should be used. Ferrite cores of sufficiently good quality should also be used
to allow a high peak flux density at increased temperature and low core losses. It is important to have a
large enough air gap to produce the highest available peak current before allowing the inductor to saturate.
If the air gap is too large however, losses can occur because the magnetic field emanating from the gap
extends far enough to induce eddy currents in the windings.
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 failing to ignite the lamp during an
attempted hot re-strike.
The inductor design process can be greatly simplified by using the Ballast Designer software. For
this application it is recommended to fix the core size to EF25 and gap size at 1mm.
Lamp Preheating
It is essential that the lamp be sufficiently preheated before ignition. The correct preheat current
can be determined from published data or from International Rectifier’s Ballast Designer software.
It is necessary in order to achieve the maximum possible lamp life to heat the cathodes to the
correct temperature before ignition. Accelerated deterioration occurs if lamps are ignited when the cathodes
are either not sufficiently heated or over heated. The cathode temperature at ignition is determined by the
preheat current, which in turn is determined by the preheat frequency through RPH and the preheat time set
by CCPH.
Cathode heating after ignition (Run mode)
The lamp filament (Cathode) resistance over the range of dimming levels should 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 1 V 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 or the cathode is likely to overheat and become open
circuit. With these results, the resistance can be calculated for each voltage and hence the acceptable
www.irf.com
- 22 -
相关PDF资料 |
PDF描述 |
|---|---|
| IRPLDIM4E | KIT DES BALLAST 26W IRS2530D |
| IRPLDIM5E | KIT DES BALLAST 4LEVEL DIM FLUOR |
| IRPLHALO1E | KIT HALOGIN CONVERTER 100VA |
| IRPLHID2 | KIT DESIGN BALLAST IRS2573D |
| IRPLLNR2U | BALLAST 32W/T8 120V AC IR21571 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRPLDIM4E | 功能描述:电源管理IC开发工具 Miniature Dimmable 26W Ballast dsgn kit 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 |
| IRPLDIM5E | 功能描述:电源管理IC开发工具 4lvl Swtch Dim Fluor Ballast dsgn Kit 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 |
| IRPLHALO1E | 功能描述:电源管理IC开发工具 Halogen Cnvrtr 220/230VAC 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 |
| IRPLHID1U | 制造商:International Rectifier 功能描述:600V .500A OTHER - Boxed Product (Development Kits) |
| IRPLHID2 | 功能描述:电源管理IC开发工具 HID Ballast for 70W Lamp Using IRS2573D 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。