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UBA2000T Datasheet(PDF) 6 Page - NXP Semiconductors |
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UBA2000T Datasheet(HTML) 6 Page - NXP Semiconductors |
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6 / 16 page  1996 Jan 03 6 Philips Semiconductors Product specification Electronic TL-lamp starter UBA2000T Fig.5 Flow chart. handbook, full pagewidth MGE003 LOW VOLTAGE DETECTION Start charging of C1 S1 is closed Enable reset N = 1 CURRENT ALARM !! Preheat time > tprn VCC > VCC(rst) VCC < VCC(rst) VCC > VCC(sl) Vin > Vign Disable reset N: ignition attempt count N > 7 Open int. switches Switch ext. switch on 1st start ? (N = 1) Isense falling edge ? Isense = Iso Close int. switches Turn ext.switch off (Generate voltage-peak to ignite TL-lamp) Standby state N = N + 1 Close int. switches Close int. switches Turn ext. switch off (if it was on) Turn ext. switch off (if it was on) yes yes yes yes yes yes yes yes yes no no no no no no no no Standby state Preheat time > tprf Isense > Iprot and t > td yes yes no no no Isense > Iprot and t > td The ext. switch is closed when mains voltage is near its peak value |
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