IR21571SPBF International Rectifier, IR21571SPBF Datasheet
IR21571SPBF
Specifications of IR21571SPBF
Related parts for IR21571SPBF
IR21571SPBF Summary of contents
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FULLY INTEGRATED BALLAST CONTROL IC Features Programmable preheat time & frequency Programmable ignition ramp Protection from failure-to-strike Lamp filament sensing & protection Protection from operation below resonance - 0.2V CS threshold sync’d to falling edge on LO Protection from low-line ...
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IR21571 (S) & (PbF) Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal ...
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Recommended Operating Conditions For proper operation the device should be used within the recommended conditions. Symbol Definition V High side floating supply voltage BS V Steady state high side floating supply offset voltage S V Supply voltage CC I Supply ...
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IR21571 (S) & (PbF) Electrical Characteristics (cont 14V +/- 0.25V BIAS 20. 0.5V Floating Supply Characteristics Symbol Definition I ...
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Electrical Characteristics (cont 14V +/- 0.25V BIAS 20. 0.5V Characteristics RUN Symbol Definition I Open circuit RUN lead leakage ...
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IR21571 (S) & (PbF) Functional Block Diagram 3.0V VDC 1 5.1V 1.0uA CPH 2 10V 5.1V 4.0V 4.0V RPH 3 2. 2.0V RUN ...
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IR21571 State Diagram SD > 2.0V (Lamp Removal) or VCC < 9.5V (Power Turned Off) FAULT Mode T > 160C J Fault Latch Set (Over-Temperature -Bridge Off 2 I 150 A QCC CPH = 0V VCC = 15.6V ...
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IR21571 (S) & (PbF) Description of Operation & Component Selection Tips Supply Bypassing and PC Board Layout Rules Component selection and placement on the pc board is extremely important when using power control ICs. V should be bypassed to COM ...
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The Control Sequence & Timing Component Selection The IR21571 uses the following control sequence (Figure 3) to drive rapid start fluorescent lamps. f Start Run f min 5V V CPH 2V V RPH 2V V RUN Ignition ...
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IR21571 (S) & (PbF) 10 tDEAD (usec RDT (Kohms) Figure 5: Deadtime versus R CPH RPH IGN RUN RUN START START ...
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Ignition Preheat Ramp Figure 7: Lamp filament voltage during the preheat, ignition ramp and run modes. The Preheat Time is programmed by means of the preheat capacitor internal 1 A current PH source, and an internal threshold ...
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IR21571 (S) & (PbF) Lamp Protection & Automatic Restart Circuitry Operation Three leads on the IR21571 are used for protection, as shown in Figure 10 below. These are V monitor), S (unlatched shutdown BUS VDC 3.0V R2 ...
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VDC CPH HO-VS RUN mode Low VDC Figure 11: VDC lead fault and auto restart Lamp Presence Detection and Automatic Restart The second protection lead, SD, is used for both unlatched shutdown ...
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IR21571 (S) & (PbF) Thus, for a lamp removal and replacement, the ballast automatically restarts the lamp in the proper manner, maximizing lamp life and minimizing stress on the power MOSFETs or IGBTs. The SD lead contains an internal 7.5V ...
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Figure 16: Hard switching condition Figure 17: Operation below resonance www.irf.com IR21571 (S) & (PbF) Figure 18: Auto restart for lamp replacement Recovery from such a fault condition is accomplished by cycling either the SD lead or the V a ...
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IR21571 (S) & (PbF) rectifie d +V BUS AC line VDC GHS CPH BOOT R RPH VB SUPPLY BOOT RT VCC 4 13 RUN COM C VCC ...
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Case outlines www.irf.com IR21571 (S) & (PbF) 16-Lead PDIP 16-Lead SOIC (narrow body) 01-6015 01-3065 00 (MS-001A) 01-6018 01-3064 00 (MS-012AC) 17 ...
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... SPN code) Assembly site code Per SCOP 200-002 Leadfree Part 16-Lead PDIP IR21571 order IR21571PbF 16-Lead SOIC IR21571S order IR21571SPbF Description of Change “Not Recommended for new design: Please use IRS21571D” Data and specifications subject to change without notice. IR logo 6/10/2008 www ...