参数资料
| 型号： | IRPLDIM3 |
| 厂商： | International Rectifier |
| 文件页数： | 18/27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页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页
Fig 10. Ballast Waveforms at Maximum Brightness
Trace
1
2
3
4
A
Color
Yellow
Red
Blue
Green
Orange
Signal
Half Bridge Voltage – VS
Feedback Voltage at RLS (and DS1 Cathode)
Lamp Arc Current
Lamp Voltage
Lamp Power (3 multiplied by 4)
The values of R18 and R19 have been selected so that when the opto-isolator IC4 is completely
off the voltage at the input of the error amplifier, at RDIM connection with the wiper of VR1, will be 1.5 V.
This will set the error amplifier input voltage to 1.5 V when the 0 to 10 V dimming control voltage is a
10 V and maximum output is required. This effectively limits the maximum lamp power because the error
amplifier will regulate the frequency in order to maintain equal voltage at RLS to the input voltage at
RDIM. The run frequency will therefore be above the ignition frequency.
The minimum dimming level can be set by R19 and adjusted by RV1, which prevents the opto-
isolator transistor from pulling the error amplifier input voltage all the way to zero. If the opto-isolator were
on continuously the input voltage to the error amplifier would be so low that the lamp would extinguish or
enter an unstable state of partial ignition. Tests have indicated that the T5 lamp behaves differently when
cold and hot at very low light levels. When the lamp is cold the arc tends to become unstable as the lamp
repeatedly extinguishes and re-ignites, however when the lamp is hot it is possible to dim all the way down
to virtually zero output and a state can be observed where the lamp is in a stable state of semi ignition,
characterized by an faint emission of light along only part of the length of the tube.
In a practical design it is desirable to limit the minimum output level to the minimum current at
which the lamp can maintain stable operation when cold.
www.irf.com
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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 |
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