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The MC34261 MC33261 are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off–line power converter applications These integrated circuits feature an internal startup timer a one quadrant multiplier for near unity power factor zero current detector to ensure critical conduction operation high gain error amplifier trimmed internal bandgap reference current sensing comparator and a totem pole output ideally suited for driving a power MOSFET

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16 Pages
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Niveau: Supérieur, Doctorat, Bac+8
Power Factor Controllers The MC34261/MC33261 are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off–line power converter applications. These integrated circuits feature an internal startup timer, a one quadrant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, high gain error amplifier, trimmed internal bandgap reference, current sensing comparator, and a totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input undervoltage lockout with hysteresis, cycle–by–cycle current limiting, and a latch for single pulse metering. These devices are available in dual–in–line and surface mount plastic packages. • Internal Startup Timer • One Quadrant Multiplier • Zero Current Detector • Trimmed 2% Internal Bandgap Reference • Totem Pole Output • Undervoltage Lockout with Hysteresis • Low Startup and Operating Current • Pinout Equivalent to the SG3561 • Functional Equivalent to the TDA4817 ON Semiconductor ? Semiconductor Components Industries, LLC, 2001 March, 2001 – Rev. 2 1 Publication Order Number: MC34261/D MC34261 MC33261 SEMICONDUCTOR TECHNICAL DATA POWER FACTOR CONTROLLERS PIN CONNECTIONS D SUFFIX PLASTIC PACKAGE CASE 751 (SO–8) 8 1 8 1 P SUFFIX PLASTIC PACKAGE CASE 626 Voltage Feedback Input 1 2 3 4 8 7 6 5 (Top View) Compensation Multiplier Input Current Sense Input V CC Drive Output Gnd Zero Current Detect Input Device Operating Temperature Range Package ORDERING INFORMATION MC34261D MC34261P

  • zero current

  • voltage feedback

  • maximum package power

  • current sense

  • operating ambient

  • threshold voltage

  • output voltage

  • power supply


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Language English

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ON Semiconductor
Power Factor Controllers The MC34261/MC33261 are active power factor controllers specifically designed for use as a preconverter in electronic ballast and in off±line power converter applications. These integrated circuits feature an internal startup timer, a one quadrant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, high gain error amplifier, trimmed internal bandgap reference, current sensing comparator, and a totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input undervoltage lockout with hysteresis, cycle±by±cycle current limiting, and a latch for single pulse metering. These devices are available in dual±in±line and surface mount plastic packages. Internal Startup Timer One Quadrant Multiplier Zero Current Detector Trimmed 2% Internal Bandgap Reference Totem Pole Output Undervoltage Lockout with Hysteresis Low Startup and Operating Current Pinout Equivalent to the SG3561 Functional Equivalent to the TDA4817
Simplified Block Diagram
Zero Current Detector 2.5V Undervoltage Reference Lockout
Zero Current 5 Detect Input V CC 8
MC34261 MC33261 POWER FACTOR CONTROLLERS SEMICONDUCTOR TECHNICAL DATA
P SUFFIX PLASTIC PACKAGE 8 CASE 626 1
D SUFFIX PLASTIC PACKAGE 8 CASE 751 1 (SO±8)
PIN CONNECTIONS
Voltage Feednbpacutk18V CC I Compensation27Drive Output Multiplier Input36Gnd Current Sense Input45ZeDreot eCctu Irnrpeuntt  Top View)
Drive Output Multiplier,7 ORDERING INFORMATION Latch, PWM, Current Sense Operating Timer,4Input Device Temperature Range Package & Logic MC34261DT A = 0 ° to +70 ° C SO±8 MC34261P Plastic DIP MC33261D SO±8  T A = ±40 ° to +85 ° C Mult Mu lie Error Amp V ref Voltage MC33261P Plastic DIP IinpplieurtltiprFeedback 3 1Input Gnd 6 Compensation 2 Semiconductor Components Industries, LLC, 2001 1 March, 2001 ± Rev. 2
Publication Order Number: MC34261/D