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PT6909 Datasheet(PDF) 1 Page - Princeton Technology Corp |
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PT6909 Datasheet(HTML) 1 Page - Princeton Technology Corp |
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1 / 4 page  Preliminary PT6909 Power Factor Correction LED Driver Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan 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 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 BLOCK DIAGRAM |
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