- 您现在的位置：买卖IC网 > PDF目录1221 > IRPLDIM5E (International Rectifier)KIT DES BALLAST 4LEVEL DIM FLUOR PDF资料下载
参数资料
| 型号： | IRPLDIM5E |
| 厂商： | International Rectifier |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | KIT DES BALLAST 4LEVEL DIM FLUOR |
| 标准包装： | 1 |
| 主要目的： | 照明，镇流器控制 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | IRS2530D |
| 主要属性： | 25W CFL 灯调光驱动器，220 VAC 输入，电压模式加热 |
| 次要属性： | 低 AC 线路/电压不足保护，灯故障保护，带自动重启功能 |
| 已供物品： | 板，CD |
| 产品目录页面： | 1383 (CN2011-ZH PDF) |
| 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 |
4. Functional Description
The IRPLDIM5E reference design is built on the IRS2530D ( DIM8 TM ) dimming platform.
The lamp arc current is detected through RCS after ignition and added to a DC control
voltage to provide an AC signal with a positive offset at the DIM pin of IC1. During DIM
mode the IRS2530D adjusts the oscillator frequency in order to maintain the amplitude of
this feedback signal such that the negative going peak is regulated at the 0V reference. In
this way the peak to peak AC feedback signal amplitude is regulated to twice the DC
control voltage level.
The IRS2530D incorporates a voltage controlled oscillator, whereby the voltage at the
VCO pin determines the frequency. This is also used to realize the preheat and ignition
ramp required to start the lamp. At switch on the voltage at the VCO pin will steadily rise
from 0V. At 0V the frequency will be at its maximum level, which is considerably above the
open circuit resonant point. As the voltage increases, the frequency gradually falls and the
voltage at the lamp increases as well as the current in the cathodes. This configuration
utilizes voltage mode heating , which is provided by means of two auxiliary windings on the
resonant output inductor of the ballast circuit. This method is the simplest and cheapest,
however current mode heating could be used if an additional transformer were to be
added to sense the arc current.
As the frequency continues to fall, the voltage at the ballast output to the lamp increases
until it reaches a point where it is sufficient to ignite the lamp. At this point arc current
begins to flow in the lamp and a feedback signal is produced at the current sense resistor
RCS. If ignition fails then the IRS2530D will shut down, going into a low VCC current fault
mode.
The dimming control reference voltage is provided at the DIM pin of IC1 and generated by
the micro controller IC2 at output GP2. GP pins refer to general purpose I/O pins of the
micro controller, which can be configured by software as high impedance inputs or CMOS
outputs. The DC dimming control voltage is produced by means of an RC integrating filter
supplied by a square wave signal. The square wave signal is generated by the micro
controller, which generates a fixed frequency signal with four separate duty cycle modes.
The higher the duty cycle, the higher the resulting filtered DC dimming control voltage
(Figure 4.1).
The GP1 input of the micro controller IC2 is also connected to the AC line input voltage
through a filter circuit with a very short delay. This allows IC2 to detect very rapidly when
AC power has been removed and restored. The 5V VDD supply storage capacitor C1 is
sufficiently large to allow IC2 to continue to run for more than one second after AC power
has been removed from the ballast. When the AC line is switched off, IC2 detects this
rapidly and starts a timer from this point. If power is restored within one second, the
dimming level is reduced by one level, thus reducing the output square wave duty cycle
and reducing the dimming level by one step. If the dimming level was already at minimum
then it will cycle back to maximum. In the case of AC power being removed for more than
one second the dimming level will not be changed. After C1 has discharged below the
minimum VDD operating voltage of IC2 the micro controller will shut off.
The micro controller that has been used here is a PIC12F629 , which contains some
EEPROM non-volatile memory. The EEPROM allows the micro to store the last dim level
www.irf.com
RD0802
-4-
相关PDF资料 |
PDF描述 |
|---|---|
| IRPLHALO1E | KIT HALOGIN CONVERTER 100VA |
| IRPLHID2 | KIT DESIGN BALLAST IRS2573D |
| IRPLLNR2U | BALLAST 32W/T8 120V AC IR21571 |
| IRPLLNR4 | BALLAST UNIV INP FLUOR IR2166 |
| IRPLLNR5 | KIT BALLAST UNIV FLUOR 54W TL5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| IRPLLED1 | 功能描述:BOARD EVALUATION FOR IRS2540PBF RoHS:是 类别:编程器，开发系统 >> 评估板 - LED 驱动器 系列:- 标准包装:1 系列:PowerWise® 电流 - 输出 / 通道:20mA 输出及类型:1，非隔离 输出电压:17V 特点:可调光 输入电压:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相关产品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| IRPLLED1A | 功能描述:电源管理IC开发工具 Hi-Vlt DC-DC Buck Cnvr HBLED Cur Cntrl 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。