PT6909
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.
FEATURES
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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)
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Input voltage limitation
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Low Input current harmonic distortion
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PWM Low-frequency dimming and phase
Dimming compatible
APPLICATIONS
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LED replacement tube
AC/DC LED driver
LED Lamp with phase dimmable
Street lamps
Traffic signals
BLOCK DIAGRAM
Tel: 886-66296288
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Fax: 886-29174598
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http://www.princeton.com.tw
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2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
PTC [ PRINCETON TECHNOLOGY CORP ]
