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参数资料
| 型号： | IRPLCFL8U |
| 厂商： | International Rectifier |
| 文件页数： | 4/27页 |
| 文件大小： | 0K |
| 描述： | KIT DES FLUOR BALLAST IRS2530D |
| 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： | IRS2530D |
| 主要属性： | 32W，调光，120 VAC |
| 次要属性： | 预热，自动预热，电压不足保护 |
| 已供物品： | 板，CD |
| 相关产品： | IRS2530DSPBF-ND - IC BALLAST CTRL DIM 600V 8-SOIC IRS2530DSTRPBFDKR-ND - IC DIMMING BALLAST CTRL 8-SOIC IRS2530DSTRPBFCT-ND - IC DIMMING BALLAST CTRL 8-SOIC IRS2530DSTRPBFTR-ND - IC DIMMING BALLAST CTRL 8-SOIC IRS2530DPBF-ND - IC CTRL BALLAST DIMMING 8-DIP |
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One strategy that has been used is to omit the preheating phase and steer the
oscillator frequency to resonance during ignition using feedback from the output circuit.
This ensures that at switch-on the highest possible ignition voltage will be applied to the
lamp. In this way the lamp will ignite in whichever position the 3 way switch is set.
Such a scheme could reliably ignite the lamp when the DC bus is at 300V, however
without correct preheating the ignition voltage of the lamp and consequently the peak
current in the MOSFET half bridge during ignition will be higher. Also the life of the
lamp is substantially reduced when there is no preheat due to far greater stress
occurring on the cathodes at the point of ignition.
Ignition when the DC bus voltage is at 150V is very difficult. Tests indicated that
sweeping the frequency down through resonance sometimes failed to produce
sufficient ignition voltage leaving the ballast in open circuit running mode. The
conclusion from this is that the ballast needs to oscillate at resonance for an extended
period of time in order for the lamp to ignite at 150V considering that the output inductor
and capacitor have been designed to produce 100% lamp power at 300VDC bus when
the frequency is 40-45kHz.
Many CFL ballast designs do not incorporate a current sense and shutdown function to
protect the circuit in the case of ignition failure and so the ballast would eventually fail if
left switched on due to the high MOSFET switching losses causing thermal destruction.
This would not matter with and integrated ballast / lamp type product when the lamp
has failed.
It has also been observed that hard switching occurs at the MOSFET half bridge when
the DC bus voltage is low in position 1 since when the ballast is running it will be close
to resonance, bearing in mind that the resonant frequency shifts downwards in run
mode. Hard switching is very undesirable because of the high peak currents that occur
when each MOSFET switches on. This has been shown to result in a higher rate of
field failures in ballasts due to MOSFET failure.
The conclusion is that the approach to design described above is unable to provide a
reliable ballast.
The dimming level can also be controlled by simply changing the frequency. By
changing the frequency between 3 defined settings, however, it was found to be
extremely difficult to set a point where the dim level is 50%. The problem with this is
that the lamp current against ballast frequency characteristic of the system exhibits a
very sharp knee such that as the frequency increases the lamp current is gradually
reduced up to a point at which a small increase of frequency will result in a very large
reduction in the lamp current.
www.irf.com
RD0803
-4-
相关PDF资料 |
PDF描述 |
|---|---|
| IRPLDIM1U | BALLAST DIMMING 32W/T8 120VAC |
| IRPLDIM2E | KIT BALLAST DIM DIG 230VAC |
| IRPLDIM2U | BALLAST DIM DIG 32W/T8 120VAC |
| IRPLDIM3 | KIT DES FLUOR BALLAST IRS2158D |
| IRPLDIM4E | KIT DES BALLAST 26W IRS2530D |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| IRPLDIM1 | 制造商:IRF 制造商全称:International Rectifier 功能描述:Dimming Ballast Control IC Design Kit |
| IRPLDIM1E | 功能描述:KIT BALLAST DIMMING 230VAC 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 |
| IRPLDIM1U | 功能描述:BALLAST DIMMING 32W/T8 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 |
| IRPLDIM2A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digitally Addressable DALI Dimming Ballast Reference Design |
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