BELINEA Belinea 103052, Руководство по обслуживанию

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MC33260
GreenLine Compact
Power Factor Controller:
Innovative Circuit for
Cost Effective Solutions
The MC33260 is a controller for Power Factor Correction
preconverters meeting international standard requirements in
electronic ballast and of f±line power conversion applications.
Designed to drive a free frequency discontinuous mode, it can also be
synchronized and in any case, it features very ef fective protections that
ensure a safe and reliable operation.
This circuit is also optimized to of fer extremely compact and cost
ef fective PFC solutions. While it requires a minimum number of
external components, the MC33260 can control the follower boost
operation that is an innovative mode allowing a drastic size reduction
of both the inductor and the power switch. Ultimately
system cost is significantly lowered.
Also able to function in a traditional way (constant output voltage
regulation level), any intermediary solutions can be easily
implemented. This flexibility makes it ideal to optimally cope with a
wide range of applications.
General Features
¡
Standard Constant Output V oltage or ™Follower Boost ∫ Mode
¡
Switch Mode Operation: Voltage Mode
¡
Latching PWM for Cycle±by±Cycle On±Time Control
¡
Constant On±T ime Operation That Saves the Use of an Extra Multiplier
¡
Totem Pole Output Gate Drive
¡
Undervoltage Lockout with Hysteresis
¡
Low Start±Up and Operating Current
¡
Improved Regulation Block Dynamic Behavior
¡
Synchronization Capability
¡
Internally Trimmed Reference Current Source
Safety Features
¡
Overvoltage Protection: Output Overvoltage Detection
¡
Undervoltage Protection: Protection Against Open Loop
¡
Ef fective Zero Current Detection
¡
Accurate and Adjustable Maximum On±Time Limitation
¡
Overcurrent Protection
¡
ESD Protection on Each Pin
MC33260P
PIN CONNECTIONS
1 8
7
6
5
2
3
4
Feedback Input
Vcontrol
Oscillator
Capacitor (C
T
)
VCC
Current Sense
Input
Synchronization
Input
Gnd
Gate Drive
8