PT6909 Просмотр технического описания (PDF) - Princeton Technology

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PT6909

Power Factor Correction LED Driver

Princeton Technology 

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: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan

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