参数资料
型号: IRPLHID2
厂商: International Rectifier
文件页数: 15/30页
文件大小: 0K
描述: KIT DESIGN BALLAST IRS2573D
标准包装: 1
系列: *
主要目的: 照明,镇流器控制
嵌入式:
已用 IC / 零件: *
主要属性: *
次要属性: *
已供物品:
6. Fault Conditions
In case of fault conditions such as open circuit, lamp removal, lamp extinguishes, short
circuit, end-of-life and lamp failure to warm-up, the IRS2573D will go into Fault Mode
after the fault timer times out. In this mode, the internal fault latch is set, full-bridge and
buck are off, ignition and fault timer are off, and the IRS2573D consumes an ultra-low
micro-power current. The IRS2573D can be reset with a fault reset (RST > VRST+) or a
recycling of VCC below and back above the UVLO thresholds. The fault timer is
programmed using the external capacitor CTCLK on the TCLK pin.
6.1 Over-Voltage Fault Counter
The IC includes an over-voltage fault counter at the VSENSE pin. In the IGN Mode, the
over-voltage fault counter will count the time during which an over-voltage condition at
the output of the buck exists due to an open-circuit condition, lamp extinguishes, lamp
removal or end-of-life. Figure 7.1 shows the waveforms when the ballast goes into Fault
Mode because of over-voltage fault. When the voltage at the VSENSE pin remains
above VOV (2/5) and the over-voltage fault counter times out (1180sec typical, with
CTCLK=0.18uF), the IC will enter Fault Mode and shutdown. Before the fault counter
times out, the ignition counter is enabled and the IC keeps trying to ignite the lamp for 21
sec ‘on’ and 64 sec ‘off’.
Figure 6.1: Over-voltage fault: CH1 is the VSENSE voltage, CH2 is IGN pin voltage, CH3 is VCC and
CH4 is LO voltage
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