PT6909 Datasheet, PDF (1/4 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
Preliminary 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
Tel: [phone]‧Fax: [phone]‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan