MC34262: Power Factor Controller

The MC34262/MC33262 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 for stand-alone applications, a one quadrant multiplier for near unity power factor, zero current detector to ensure critical conduction operation, transconductance error amplifier, quickstart circuit for enhanced startup, 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 an overvoltage comparator to eliminate runaway output voltage due to load removal, input undervoltage lockout with hysteresis, cycle-by-cycle current limiting, multiplier output clamp that limits maximum peak switch current, an RS latch for single pulse metering, and a drive output high state clamp for MOSFET gate protection. These devices are available in dual-in-line and surface mount plastic packages.

Features
  • Overvoltage Comparator Eliminates Runaway Output Voltage
  • Internal Startup Timer
  • One Quadrant Multiplier
  • Zero Current Detector
  • Trimmed 2% Internal Bandgap Reference
  • Totem Pole Output with High State Clamp
  • Undervoltage Lockout with 6.0 V of Hysteresis
  • Low Startup and Operating Current
  • Supersedes Functionality of SG3561 and TDA4817 Simplified Block Diagram
Applications
  • Active Power Factor Control
End Products
  • Electronic Ballast
  • OffLine Power Converters
Application Notes (3)
Document TitleDocument ID/SizeRevisionRevision Date
Efficient Safety Circuit for Electronic BallastAN1601/D (144.0kB)0
Electronic Lamp Ballast DesignAN1543/D (687.0kB)1
Power Factor Correction Stages Operating in Critical Conduction ModeAND8123/D (288kB)2Nov, 2014
Package Drawings (2)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
SOIC-8 Narrow Body751-07 (62.6kB)AK
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Power Factor ControllerMC34262/D (394.0kB)14
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
MC34262DGActivePb-free Halide freeSOIC-8751-071Tube98$0.3333
MC34262DR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.3333
MC34262PGActivePb-free Halide freePDIP-8626-05NATube50$0.3333
Specifications
ProductPFC ModeFrequency OperationControl ModeTopologyfSW Typ (kHz)VCC Max (V)Drive Cap. (mA)UVLO (V)LatchUVPInhibition
MC34262DGCCMVariableCurrent ModeBoost5030500 / 500YesFixedNoYes
MC34262DR2GCCMVariableCurrent ModeBoost5030500 / 500YesFixedNoYes
MC34262PGCCMVariableCurrent ModeBoost5030500 / 500YesFixedNoYes
Power Factor Controller (394.0kB) MC34262
Efficient Safety Circuit for Electronic Ballast MC34262
Electronic Lamp Ballast Design MUR120
Power Factor Correction Stages Operating in Critical Conduction Mode NCP1650
SOIC-8 Narrow Body CM1216
8 LEAD PDIP NE592