PT6909_10 Datasheet, PDF (1/8 Pages) Princeton Technology Corp – Power Factor Correction LED Driver

DESCRIPTION
PT6909 is a fixed frequency PWM controller IC
designed to control high brightness LED driver using a
single-stage PFC boost-buck topology. It can achieve
a well power factor and a higher dc-bus voltage. This
topology allows reducing the filter capacitors and using
non-electrolytic capacitors to improve reliability. The
PT6909 uses open-loop peak current control
technique eliminates a need for loop compensation,
limits the input inrush current, and is inherently
protected from input under-voltage condition.
PT6909 provides a low frequency PWM dimming input
that can accept an external control signal with a duty
cycle of 0-100% and a frequency of between 100Hz
and a few KHz. The PWM dimming capability enables
PT6909 phase control solutions that can work with
standard TRIAC.
APPLICATIONS
• LED replacement tube
• AC/DC LED driver
• LED Lamp with phase dimmable
• Street lamps
• Traffic signals
BLOCK DIAGRAM
PT6909
Power Factor Correction LED Driver
FEATURES
• Simple power factor correction Integrated
• Low start-up current
• 8V to 12V input range
• Constant-current driver
• Programmable fixed frequency operation
• Input and output current sensing
• Input current limit
• Boost circuit over-voltage protection(LED open
protection)
• Input voltage limitation
• Low Input current harmonic distortion
• PWM Low-frequency dimming and phase
Dimming compatible
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