PT6911 Ver la hoja de datos (PDF) - Princeton Technology

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PT6911

Wide Input Range Buck LED Driver

Princeton Technology 

DESCRIPTION

The PT6911 is ideally suited for AC/DC buck LED

drivers. Since the PT6911 includes an 8V-450V linear

regulator which allows it to work from a wide range of

input voltages without the need for an external low

voltage supply. Besides, the PT6911 operates in

hysteretic control mode, the controller achieves good

output current regulation without the need for any loop

compensation. The PT6911 delivers constant current

within high accuracy to a wide variety and number of

series connected LEDs.

The PT6911 includes PWM dimming and linear

dimming functions. The PWM dimming input can

accept an external control signal with a duty cycle of

0~100% and a frequency between 100Hz and a few

KHz. Output current to LED string can be programmed

to any value between 0 to its maximum value by PWM

dimming. Also, a 0~1.2V linear dimming input can be

used for linear dimming of the LED current.

APPLICATIONS

• AC/DC LED driver

• Backlight LED driver

• Constant-Current driver

BLOCK DIAGRAM

Preliminary PT6911

Wide Input Range Buck LED Driver

FEATURES

• 8V to 450V input range

• Hysteretic controller

• High accuracy output current

• Low stand-by power dissipation

• Soft start

• PWM low-frequency dimming and linear dimming

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

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