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
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Applications- Active Power Factor Control
| End Products- Electronic Ballast
- OffLine Power Converters
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Application Notes (3)
Package Drawings (2)
Data Sheets (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| MC34262DG | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 1 | Tube | 98 | $0.3333 |
| MC34262DR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 1 | Tape and Reel | 2500 | $0.3333 |
| MC34262PG | Active | Pb-free
Halide free | PDIP-8 | 626-05 | NA | Tube | 50 | $0.3333 |
Specifications
| Product | PFC Mode | Frequency Operation | Control Mode | Topology | fSW Typ (kHz) | VCC Max (V) | Drive Cap. (mA) | UVLO (V) | Latch | UVP | Inhibition |
|---|
| MC34262DG | CCM | Variable | Current Mode | Boost | 50 | 30 | 500 / 500 | Yes | Fixed | No | Yes |
| MC34262DR2G | CCM | Variable | Current Mode | Boost | 50 | 30 | 500 / 500 | Yes | Fixed | No | Yes |
| MC34262PG | CCM | Variable | Current Mode | Boost | 50 | 30 | 500 / 500 | Yes | Fixed | No | Yes |
