IRPLLNR2U International Rectifier, IRPLLNR2U Datasheet

Page 1

... International Rectifier Features = Drives 32W T8 Lamp (IRPLLNR2U 36W T8 Lamp (IRPLLNR2) = Input: 90-140VAC/60Hz (IRPLLNR2U) 185-265VAC/50Hz (IRPLLNR2) = High Power Factor/Low THD = High Frequency Operation (42kHz) = Lamp Filament Preheating = Lamp Fault Protection with Auto-Restart = Brownout Protection = IR21571 HVIC Ballast Controller Description The IRPLLNR2 is a high efficiency, high power factor, fixed output electronic ballast designed for driving rapid start fluorescent lamp types ...

Page 2

... Ballast Restart Operation Deactivates Increase line voltage Deactivates Lamp exchange Deactivates Lamp exchange Deactivates Lamp exchange Deactivates Lamp exchange Value (IRPLLNR2U) 32W T8 32 0.300 44 220 0 0.34 90..140/50..60Hz 100..180 0.99 <10 600 www.irf.com ...

Page 3

RV1 R2 N BR1 R5 GND R12 R11 CPH CRAMP RPH C7 RT MC34262 ...

Page 4

... IRPLLNR2U Bill Of Materials Lamp type: T8/32W Line Input Voltage: 90..140 VAC/50..60 Hz Note: Different lamp types require different frequency programming components. Item # Qt Manufacturer 1 1 International Rectifier DF10S 2 1 Roederstein WY0222MCMBF0K 3 1 Roederstein F1772433-2200 4 1 Wima MKP10 5 3 Panasonic ECU-V1H103KBM 6 3 Panasonic ...

Page 5

... International Rectifier 10BF60 18 1 Diodes ZMM5250BCT 19 1 Motorola MC34262 20 1 International Rectifier IR21571 21 1 Panasonic ELF-15N007A 22 1 RG-Allen 23 1 RG-Allen 24 3 International Rectifier IRF830 25 5 Panasonic ERJ-8GEYJ680K 26 1 Panasonic ERJ-8GEYJ10K 27 1 Panasonic ERJ-8GEYJ8. Panasonic ERJ-8GEYJ100K 29 3 Panasonic ERJ-8GEYJ22K 30 3 Panasonic ERJ-8GEYJ22 ...

Page 6

Power Factor Correction The power factor correction section consists of the Motorola Semiconductor MC34262 Power Factor Controller IC (IC1), MOSFET M1, inductor L2, diode D2, capacitor C8 and additional biasing, sens- ing and compensation components (see schematic diagram). The IC ...

Page 7

SD > 2.0V (Lamp Removal) or VCC < 9.5V (Power Turned Off) FAULT Mode T > 140C J (Over-Temperature) Fault Latch Set 1 / -Bridge Off 2 I 150 A QCC CPH = 0V VCC = 15.6V Oscillator Off CS ...

Page 8

Startup Mode When power is initially applied to the ballast, the voltage on the VCC pin of IC2 (IR21571) begins to charge up. The voltage for IC2 is derived from the current supplied from the rectified AC line through startup ...

Page 9

Figure 4: Lamp filament current during Startup, Preheat, Ignition Ramp and Run (500mA/div) Figure 6 shows a plot of the half-bridge oscillation frequency as a function of time for all of the normal modes of operation: Preheat mode, Ignition Ramp ...

Page 10

Figure 7: Typical lamp voltage at startup Startup P reheat The duration of the Preheat mode as well as which mode of operation the ballast is operating in is determined by the voltage on the CPH pin ...

Page 11

Figure 9 shows the ramping of voltage appearing across the lamp and also the voltage on capacitor CRAMP. Note that the sudden drop in lamp voltage indicates that the lamp has ignited. Also note ...

Page 12

Lamp resonant circuit inductor (L3 Lamp resonant circuit capacitor (C14 Lamp running power P Lamp = Lamp running voltage amplitude V Lamp Figure 11 shows the voltage appearing across the lamp while Figure 12 ...

Page 13

MOSFET, M2, is turned off. The magnitude of this voltage directly relates to the current in the lamp resonant circuit. Figure 13 shows the voltage which appears across resis- tor RCS during normal Run ...

Page 14

Figure 15: Failure of lamp to ignite condition (lamp filaments good): Upper trace: voltage across RCS, Lower trace: lamp voltage Figure 17: Hard-switching condition (upper filament open): Upper trace: voltage across RCS, Middle trace: IC2 LO pin voltage, Lower trace: ...

Page 15

Figure 19 shows a near/below resonance condition where the voltage on resistor RCS falls below the 0.2V threshold on the CS pin of ...

Page 16

Data Sheets Lighting Ballast Control IC - Designer’s Manual 16 www.irf.com ...