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

Amanda

Description

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

Sujets

• Régulation
• Threshold voltage
• Power supply

Informations

• Publié par: profil-zyak-2012
• Nombre de lectures: 29
• Langue: English

Extrait

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 Feed n b p ac ut k 18 V CC I Compensation27Drive Output Multiplier Input 36 Gnd Current Sense Input 45 Ze D r e o t   e C ct u  I r n r p e u n t t  Top View)

Drive Output Multiplier, 7 ORDERING INFORMATION Latch, PWM, Current Sense Operating Timer, 4 Input Device Temperature Range  Package & Logic MC34261D T 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 I i n p p lie u r t ltipr Feedback 3 1 Input Gnd 6 Compensation 2  Semiconductor Components Industries, LLC, 2001 1 March, 2001 ± Rev. 2

Publication Order Number: MC34261/D