参数资料
| 型号： | IRPLLNR5 |
| 厂商： | International Rectifier |
| 文件页数： | 17/21页 |
| 文件大小： | 0K |
| 描述： | KIT BALLAST UNIV FLUOR 54W TL5 |
| 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： | IRS2168D |
| 主要属性： | 54 W TL5，90 ~ 305 VAC，PFC |
| 次要属性： | 灯丝预热，自动复位；灯丝断路、无灯和电压不足保护 |
| 已供物品： | 板，CD |
| 相关产品： | IRS2168DPBF-ND - IC PFC BALLAST CTLR ADV 16-PDIP IRS2168DSPBF-ND - IC PFC/BALLAST CONTROL 16-SOIC IRS2168DSTRPBFDKR-ND - IC PFC & BALLAST CONTROL 16-SOIC IRS2168DSTRPBFCT-ND - IC PFC & BALLAST CONTROL 16-SOIC IRS2168DSTRPBFTR-ND - IC PFC & BALLAST CONTROL 16-SOIC |
UVLO Mode and the PFC and ballast oscillators are disabled, the PFC and half-bridge driver outputs
(PFC, LO, and HO) are turned off, and the IRS2168D consumes micro-power current at VCC.
Lamp Removal and Auto-Restart
Resistors RPU, RSD and capacitor CSD1 form a divider/filter network used to detect an open lower
lamp filament and/or lamp replacement. Under normal conditions, the voltage across CSD1 is close to
zero. If the lower filament becomes open or the lamp is removed, however, the voltage at the SD pin
increases above the 5 V threshold and causes the IC to shutdown (Figure 12). The ballast remains
shutdown until a lamp replacement is performed. If the lamp is replaced with a lamp with a good lower
filament, the voltage on the SD pin of the IRS2168D drops back below the 3 V threshold and the
ballast will restart in Preheat Mode. The ballast will go through the Preheat, Ignition, and Run Mode
sequences each time a restart is performed. Note that the SD pin of the IRS2168D is active during
Preheat and Run Modes and is disabled during Ignition Mode.
Fig. 12: SD Pin Voltage (Black) and Lamp Voltage (Blue) during
Lamp Removal/Auto-Restart Condition
Fault Mode
When a fault is detected at the CS pin or SD/EOL pin, the IC will enter Fault Mode. During Fault
Mode, the ballast section and PFC section are both shutdown. The DC bus voltage will drop to the
non-boosted peak AC line voltage level. There are several lamp fault conditions that can cause the IC
to enter into Fault Mode. These include: hard-switching at the half-bridge mid-point (open load), over-
current (non-strike), lamp voltage shift (end-of-life), and lamp removal (SD/EOL pin). Resistor RCS in
the source lead of the low-side MOSFET (MLS) serves as the current-sensing point for the half-bridge,
and is used to detect hard-switching or over-current. During normal operation when the half-bridge is
oscillating, a voltage appears across RCS when the low-side MOSFET, MLS, is turned on. The
magnitude of this voltage directly relates to the current in the lamp resonant circuit.
www.irf.com
RD-0613
17
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