IL34262 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – Power Factor Controllers

IL34262
Power Factor Controllers
The 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
8
1
• Undervoltage Lockout with 6.0 V of Hysteresis
• Low Startup and Operating Current
• Supersedes Functionality of SG3561 andTDA4817
Figure 1. Package and pin connection
Figure 2. Simplified Block Diagram
Korzhenevsky 12, Minsk, 220064, Republic of Belarus
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277 69 16
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