参数资料
型号: IRPLCFL8U
厂商: International Rectifier
文件页数: 16/27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:
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
In case the DC bus decreases too far and the lamp extinguishes, the VCC voltage will
go below VCCUV- and the ignition/preheat ramp will be reset to re-ignite the lamp
reliably.
Figure 7.2: Brown-out conditions: CH1 is the VCO voltage, CH2 is the VS voltage
Lamp Removal
When the lamp is removed, the IRS2530D uses the Crest Factor Over-current
Protection to enter the Fault mode and shut down. During lamp removal, the output
stage will transition to a series-LC configuration, and the frequency will move towards
resonance until the inductor saturates. The IRS2530D uses the VS-sensing circuitry
and the RDSon of the low-side half-bridge MOSFET to measure the MOSFET current
for detecting an over-current fault. Should the peak current exceed the average current
by a factor of 5.5 (CF>5.5) during the on-time of LO, the IRS2530D will enter Fault
Mode, where the half-bridge is off. Performing crest factor measurement provides a
relative current measurement that cancels temperature and/or tolerance variations of
the RDSon of the low-side half-bridge MOSFET.
Figure 7.3 shows the voltage across the lamp and the VS voltage when the lower
filament of the lamp is removed. Figure 7.4 shows these voltages when the upper
filament of the lamp is removed. In both cases, the IRS2530D will enter the Fault Mode
and shut down after detecting that the crest factor exceeds 5 during the on-time of LO.
Figure 7.5 shows the VS pin, inductor current, and voltage across lamp when the
inductor saturates and the ballast shuts down.
www.irf.com
RD0803
- 16 -
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