IRPLLNR2 IRF | Alldatasheet
Document overview
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Technical content
Features
/G3D Drives: 1 x 32W T8 Lamp (IRPLLNR2U) 1 x 36W T8 Lamp (IRPLLNR2) /G3D Input: 90-140VAC/60Hz (IRPLLNR2U) 185-265VAC/50Hz (IRPLLNR2) /G3D High Power Factor/Low THD /G3D High Frequency Operation (42kHz) /G3D Lamp Filament Preheating /G3D Lamp Fault Protection with Auto-Restart /G3D Brownout Protection /G3D 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. The design contains an EMI filter, active power factor correction and a ballast control circuit using the IR21571. This demo board is intended to ease the evaluation of the IR21571 Ballast Control IC, demonstrate PCB layout techniques and serve as an aid in the development of production ballast’s using the International Rectifier IR21571. Ballast Block Diagram EMI Filter Rectifier PFC Half-Brid ge Output Sta ge Line Lamp PFC Control IR21571 UVLO Lamp Fault International Rectifier • 233 Kansas Street, El Segundo, CA 90245 USA IRPLLNR2
2 www.irf.com Parameter Units Value (IRPLLNR2) Value (IRPLLNR2U) Lamp Type 36W T8 32W T8 Input Power [W] 36 32 Input Current [Arms] 0.300 0.300 Preheat Mode Frequency [kHz] 44 44 Preheat Mode Lamp Voltage [Vrms] 220 220 Preheat Time [s] 0.9 0.6 Ignition Ramp Mode Frequency [kHz] 38 38 Run Mode Frequency [kHz] 42 42 Lamp Run Current [Arms] 0.34 0.34 Input DC Voltage Range [VDC] 250..350 100..180 Power Factor 0.98 0.99 Total Harmonic Distortion [%] <15 <10 Maximum Output Voltage [Vpk] 600 600
Electrical Characteristics
Note: Measurements performed with input AC line voltage = 120Vrms (IRPLDIM1U) 230Vrms (IRPLDIM1) Fault Ballast Restart Operation Line voltage low Deactivates Increase line voltage Upper filament broken Deactivates Lamp exchange Lower filament broken Deactivates Lamp exchange Failure to ignite Deactivates Lamp exchange Open circuit (no lamp) Deactivates Lamp exchange Fault Protection Characteristics Functional Description Overview he IRPLDIM1 Demo Board consists of an EMI filter, an active power factor correction front end, a ballast control section and a resonant lamp output stage. The active power factor correction section is a boost converter operating in critical mode conduction, free-running frequency mode. The ballast control section provides frequency modulation control of a traditional RCL lamp resonant output circuit and is easily adaptable to a wide variety of lamp types. The ballast control section also pro- vides the necessary circuitry to perform closed-loop dimming, lamp fault detection, shutdown and auto-restart. All functional descriptions refer to the IRPLDIM1 schematic diagram.
3www.irf.com BR1 R10 CRAMP CPH R11 CSTART RSTART RT C13 CT RRUN RPH RDT C11 C10 R14 R13 RCS R16 R15 C12 R17 C17 C15 C16 R18 R12 Note: Thick traces represent high-frequency, high-current paths. Lead lengths should be minimized to avoid high-frequency noise problems L N RV1 GND ROC IR21571 VDC CPH RPH RT RUN CT DT OC LO COM VCC VB VS HO SD CS R19 COC MC34262 C14 R20 R21 IRPLLNR2/IRPLLNR2U Schematic Diagram
4 www.irf.com 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 Part Number Description Reference 1 1 International Rectifier DF10S Bridge Rectifier, 1A 1000V BR1 2 1 Roederstein WY0222MCMBF0K Capacitor, 2.2nF 275 VAC Y Cap C1 3 1 Roederstein F1772433-2200 Capacitor, 0.33uF 275 VAC C2 4 1 Wima MKP10 Capacitor, 0.01uF 400 VDC C3 5 3 Panasonic ECU-V1H103KBM Capacitor, 0.01uF SMT 1206 C4, CRAMP, CSTART 6 3 Panasonic ECJ-3YB1E474K Capacitor, 0.47uF SMT 1206 C5, C6, C13 7 5 Panasonic ECU-V1H104KBM Capacitor, 0.1uF SMT 1206 C9,CPH, COC, C10, C11 8 1 Panasonic EEU-EB2V100 Capacitor, 10uF 350VDC 105C C8 9 1 Panasonic ECU-V1H471KBM Capacitor, 470pF SMT 1206 CT 10 1 Panasonic ECE-A1HGE010 Capacitor, 1uF 50VDC 105C C12 11 1 Vitramon 1812A152KXE Capacitor, 1.5nF 1KV SMT 1812 C14 12 1 Wima MKP10 Capacitor, 0.1uF 400VDC C15 13 1 Vitramon 1812A102KXE Capacitor, 1nF 1KV SMT 1812 C16 14 1 Panasonic ECW-H16103JV Capacitor, 0.01uF 1.6KV C17 15 1 Panasonic ECU-V1H101KBM Capacitor, 100pF SMT 1206 CCS 16 3 Diodes LL4148DICT-ND Diode, 1N4148 SMT DL35 D1, D5, D6 17 2 International Rectifier 10BF60 Diode, SMT SMB D2, D4 18 1 Diodes ZMM5250BCT Diode, Zener , 20V SMT DL35 D3 19 1 Motorola MC34262 IC, Power Factor Controller IC1 20 1 International Rectifier IR21571 IC, Ballast Driver IC2 21 1 Panasonic ELF-15N007A EMI Inductor, 1X10mH 0.7Apk L1 22 1 RG-Allen PFC Inductor, 2.0mH 2.0Apk L2 23 1 RG-Allen Inductor, 2.0mH 2.0Apk L3 24 3 International Rectifier IRF730 Transistor, MOSFET M1, M2, M3 25 5 Panasonic ERJ-8GEYJ680K Resistor, 680K ohm SMT 1206 R1, R2, R4, R5, R17 26 1 Panasonic ERJ-8GEYJ10K Resistor, 10K ohm SMT 1206 R3 27 1 Panasonic ERJ-8GEYJ12K Resistor, 12K ohm SMT 1206 R6 28 1 Panasonic ERJ-8GEYJ100K Resistor, 100K ohm SMT 1206 R7 29 3 Panasonic ERJ-8GEYJ22K Resistor, 22K ohm SMT 1206 R8, RSTART, RT 30 3 Panasonic ERJ-8GEYJ22 Resistor, 22 ohm SMT 1206 R9, R13, R15 31 1 Dale CW-1/2 Resistor, 0.5 ohm ½ watt R10 32 1 Panasonic ERJ-8GEYJ130K Resistor, 130K ohm SMT 1206 R11 33 1 Yageo 2.2MQBK-ND Resistor, 2.2megohm ¼ watt R12 34 1 Dale CW-1/2 Resistor, 0.68 ohm ½ watt RCS 35 1 Panasonic ERJ-8GEYJ5.6K Resistor, 5.6K ohm SMT 1206 RDT 36 1 Panasonic ERJ-8GEYJ30K Resistor, 30K ohm SMT 1206 ROC 37 1 Panasonic ERJ-8GEYJ91K Resistor, 91K ohm SMT 1206 RPH 38 1 Panasonic ERJ-8GEYJ150K Resistor, 150K ohm SMT 1206 RRUN 39 1 Yageo 390KQBK-ND Resistor, 390K ohm ¼ watt R14 40 1 Panasonic ERJ-8GEYJ1K Resistor, 1K ohm SMT 1206 R16 41 1 Panasonic ERJ-8GEYJ2.2M Resistor, 2.2megohm SMT 1206 R18 42 1 Yageo 100KQBK-ND Resistor, 100K ohm ¼ watt R19 43 1 Panasonic ERZ-V05D471 Transient Suppressor RV1 44 2 Panasonic ERJ-8GEYJ10 Resistor, 10 ohm SMT 1206 R20, R21 Total 67
5www.irf.com IRPLLNR2 Bill Of Materials Lamp type: T8/36W Line Input Voltage: 180..255 VAC/50..60 Hz Note: Different lamp types require different frequency programming components. Item # Qt Manufacturer Part Number Description Reference 1 1 International Rectifier DF10S Bridge Rectifier, 1A 1000V BR1 2 1 Roederstein WY0222MCMBF0K Capacitor, 2.2nF 275 VAC Y Cap C1 3 1 Roederstein F1772433-2200 Capacitor, 0.33uF 275 VAC C2 4 1 Wima MKP10 Capacitor, 0.01uF 400 VDC C3 5 3 Panasonic ECU-V1H103KBM Capacitor, 0.01uF SMT 1206 C4, CRAMP, CSTART 6 3 Panasonic ECJ-3YB1E474K Capacitor, 0.47uF SMT 1206 C5, C6, C13 7 5 Panasonic ECU-V1H104KBM Capacitor, 0.1uF SMT 1206 C9,CPH, COC, C10, C11 8 1 Panasonic EEU-EB2V100 Capacitor, 10uF 350VDC 105C C8 9 1 Panasonic ECU-V1H471KBM Capacitor, 470pF SMT 1206 CT 10 1 Panasonic ECE-A1HGE010 Capacitor, 1uF 50VDC 105C C12 11 1 Vitramon 1812A152KXE Capacitor, 1.5nF 1KV SMT 1812 C14 12 1 Wima MKP10 Capacitor, 0.1uF 400VDC C15 13 1 Vitramon 1812A102KXE Capacitor, 1nF 1KV SMT 1812 C16 14 1 Panasonic ECW-H16103JV Capacitor, 0.01uF 1.6KV C17 15 1 Panasonic ECU-V1H101KBM Capacitor, 100pF SMT 1206 CCS 16 3 Diodes LL4148DICT-ND Diode, 1N4148 SMT DL35 D1, D5, D6 17 2 International Rectifier 10BF60 Diode, SMT SMB D2, D4 18 1 Diodes ZMM5250BCT Diode, Zener 20V SMT DL35 D3 19 1 Motorola MC34262 IC, Power Factor Controller IC1 20 1 International Rectifier IR21571 IC, Ballast Driver IC2 21 1 Panasonic ELF-15N007A EMI Inductor, 1X10mH 0.7Apk L1 22 1 RG-Allen PFC Inductor, 2.0mH 2.0Apk L2 23 1 RG-Allen Inductor, 2.0mH 2.0Apk L3 24 3 International Rectifier IRF830 Transistor, MOSFET M1, M2, M3 25 5 Panasonic ERJ-8GEYJ680K Resistor, 680K ohm SMT 1206 R1, R2, R4, R5, R17 26 1 Panasonic ERJ-8GEYJ10K Resistor, 10K ohm SMT 1206 R3 27 1 Panasonic ERJ-8GEYJ8.2K Resistor, 8.2K ohm SMT 1206 R6 28 1 Panasonic ERJ-8GEYJ100K Resistor, 100K ohm SMT 1206 R7 29 3 Panasonic ERJ-8GEYJ22K Resistor, 22K ohm SMT 1206 R8, RSTART, RT 30 3 Panasonic ERJ-8GEYJ22 Resistor, 22 ohm SMT 1206 R9, R13, R15 31 1 Dale CW-1/2 Resistor, 1.0 ohm ½ watt R10 32 1 Panasonic ERJ-8GEYJ56K Resistor, 56K ohm SMT 1206 R11 33 1 Yageo 2.2MQBK-ND Resistor, 2.2megohm ¼ watt R12 34 1 Dale CW-1/2 Resistor, 0.68 ohm ½ watt RCS 35 1 Panasonic ERJ-8GEYJ5.6K Resistor, 5.6K ohm SMT 1206 RDT 36 1 Panasonic ERJ-8GEYJ30K Resistor, 30K ohm SMT 1206 ROC 37 1 Panasonic ERJ-8GEYJ75K Resistor, 75K ohm SMT 1206 RPH 38 1 Panasonic ERJ-8GEYJ150K Resistor, 150K ohm SMT 1206 RRUN 39 1 Yageo 390KQBK-ND Resistor, 390K ohm ¼ watt R14 40 1 Panasonic ERJ-8GEYJ1K Resistor, 1K ohm SMT 1206 R16 41 1 Panasonic ERJ-8GEYJ2.2M Resistor, 2.2megohm SMT 1206 R18 42 1 Yageo 100KQBK-ND Resistor, 100K ohm ¼ watt R19 43 1 Panasonic ERZ-V05D471 Transient Suppressor RV1 44 2 Panasonic ERJ-8GEYJ10 Resistor, 10 ohm SMT 1206 R20, R21 Total 65
6 www.irf.com 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 was chosen for its minimal component count, low start-up supply current and robust error amplifier. This is a boost topology designed to step-up and regulate the output DC bus voltage while drawing sinusoidal current from the line (low THD) which is “in phase” with the AC input line voltage (HPF). The design of the power factor correction section was taken from the Motorola Semiconductor MC34262 data sheet and information on the operation and design considerations for the MC34262 are contained therein. Ballast Control The ballast control section is built around the IR21571 Ballast Control IC, IC2 of the Demo board. The IR21571 contains an oscillator, a high voltage half-bridge gate driver and lamp fault protection circuitry. A block diagram of the IR21571 IC is shown in figure 1 and a state diagram of the IR21571 is shown in figure 2. Following is a breakdown of the operation of the ballast in all of the different modes of operation. OVER- TEMP DETECT LEVEL SHIFT PULSE FILTER & LATCH 4.0V 5.1V 7.6V 3.0V 5.1V 1.0uA 2.0V IRT ICT = IRT 4.0V 2.0V CPH RPH RT RUN CT DT VDC QS R2 Q QT RQ 15 VS HO VB
12 COM
15.6V 9 SD 0.2V CS QS RQ QD RQ CLK QS RQ UNDER- VOLTAGE DETECT 2.0V 8OC 50uA 7.6V 7.6V 7.6V Figure 1: IR21571 Block Diagram
7www.irf.com UVLO Mode 1/2-Bridge Off IQCC ≅ 150µA CPH = 0V Oscillator Off PREHEAT Mode 1/2-Bridge @ fPH CPH Charging @ IPH = 1µA RPH = 0V RUN = Open Circuit CS Disabled IGNITION RAMP Mode fPH ramps to fMIN CPH Charging @ IPH = 1µA RPH = Open Circuit RUN = Open Circuit CS+ Threshold Enabled RUN Mode fMIN Ramps to fRUN CPH Charges to 7.6V Clamp RPH = Open Circuit RUN = 0V CS- Threshold Enabled VCC > 11.4V (UV+ ) and VDC > 5.1V (Bus OK) and SD < 1.7V (Lamp OK ) and TJ < 140C (Tjmax) CPH > 4.0V (End of PREHEAT Mode) CPH > 5.1V (End of IGNITION RAMP) VCC < 9.5V (VCC Fault or Power Down) or VDC < 3.0V (dc Bus/ac Line Fault or Power Down) or SD > 2.0V (Lamp Fault or Lamp Removal) Power Turned On FAULT Mode Fault Latch Set 1/2-Bridge Off IQCC ≅ 150µA CPH = 0V VCC = 15.6V Oscillator Off TJ > 140C (Over-Temperature) CS > CS+ Threshold (Failure to Strike Lamp or Hard Switching) or TJ > 140C (Over-Temperature) CS > CS+ Threshold (Over-Current or Hard Switching) or CS < 0.2V (No-Load or Below Resonance) or TJ > 140C (Over-Temperature) SD > 2.0V (Lamp Removal) or VCC < 9.5V (Power Turned Off) Figure 2: IR21571 State Diagram
8 www.irf.com 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 resistor R14. During this initial startup when the VCC voltage of IC2 is below its rising under- voltage lock-out threshold (11.4V), IC2 is in its UVLO and also its micro-power mode. The micro- power mode of the IC2 allows the use of a large value, low wattage startup resistor (R14). When the voltage on IC2 reaches the rising under-voltage lockout thresh- old, the oscillator is enabled (this assumes that there are no fault conditions) and drives the half-bridge out- put MOSFETs (M2 and M3). When the half-bridge is oscillating, capacitor C16, diodes D5 and D6 form a snubber /charge pump circuit which limits the rise and fall time at the half-bridge output and also supplies the current to charge capacitor C12 to the VCC clamp volt- age (approx. 15.6V) of IC2. The voltage for IC1 is de- rived from the current supplied from another snubber/ charge pump circuit formed by capacitor C14 and di- odes D1 and D3. When the rising under-voltage lock- out threshold of IC1 is reached, it starts to oscillate and drive MOSFET M1 to boost and regulate the bus voltage to 400 VDC. An oscillograph of the startup of the VCC of IC1, VCC of IC2 and half-bridge output voltage are shown in Figure 3. (For a complete de- scription of the operation of IC1, refer to the Motorola Semiconductor MC34262 data sheet.) Preheat Mode When the ballast reaches the end of the UVLO mode, the Preheat mode is entered. At this point the oscillator of IC2 has begun to operate and the half-bridge output is driving the resonant load (lamp) circuit. The oscillator section of IC2 is similar to oscillators found in many popular PWM voltage regulator ICs and consists of a timing capacitor and resistor connected to ground. Resistors RT and RPH program a current which determines the ramp up time of capacitor CT and resistor RDT deter- mines the ramp down time. The downward ramping time of CT is the deadtime between the switch- ing off of the LO (HO) and the switching on of the HO (LO) pins on IC2. The Preheat mode frequency of oscillation is selected such that the voltage appearing across the lamp is below the minimum lamp ignition voltage while supplying enough current to preheat the lamp filaments to the correct emission temperature within the Preheat mode period. The preheating of the lamp filaments is performed with a constant current during the Preheat mode. The waveform in Figure 4 shows the lamp filament current while Figure 5 shows lamp filament voltage during the normal Startup, Preheat, Ignition Ramp and Run modes of the ballast. Figure 3: Top trace: Half-bridge output voltage Middle trace: VCC of IC2 Bottom trace: VCC of IC1
15www.irf.com frequency of the load circuit and the current in the load circuit commutates to close to zero. 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 IC2. Figure 19: Near/Below Resonance conditions Upper trace: voltage across RCS Lower trace: half-bridge output voltage Resistors R17, R18 and capacitor C13 form a divider/filter network which is used to detect an open lower lamp filament and/or lamp replace- ment. Under normal conditions, the voltage across C8 is approximately zero volts. However, if the lower fila- ment becomes open or the lamp is removed, the voltage across C13 in- creases above the 2V threshold for the SD pin of IC2 and signals a lamp fault condition which in turn puts the ballast into Fault mode. The ballast remains in the Fault mode until the line voltage is cycled or a lamp re- placement is performed. If the lamp is replaced with a lamp with a good lower filament, the voltage on the SD pin of IC2 is pulled back below the 2V threshold and the ballast will go through a restart. Line voltage cycling is also used to restart the ballast for all lamp fault conditions. The ballast will go through a full Preheat, Ignition Ramp and Run modes any time a restart is performed. Note that the SD pin of IC2 is active during all modes of operation. Another way that the ballast can go into Fault mode is if the AC line voltage falls below approximately 170Vrms. Resistors R11, R12 and capacitor C9 form a voltage divider/filter network which is con- nected to the VDC pin of IC2 and is used to determine if the line voltage falls below permissible levels. This happens when the line voltage is cycled or possibly a brownout condition occurs. The VDC pin of IC2 senses a fault if the voltage at the pin falls below 3 volts and shutdown of the ballast occurs. The ballast remains shutdown until the voltage at the VDC pin rises above 5.1 volts. At this time if there are no other fault conditions the ballast will go through a full Preheat, Ignition Ramp and Run mode. As in the case of the SD pin of IC2, the VDC pin of IC2 is active during all modes of operation of the ballast. IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 10/28/2000
16 www.irf.com Data Sheets Lighting Ballast Control IC - Designer’s Manual