PT6907-S PTC [Princeton Technology Corp], PT6907-S Datasheet

PT6907-S

Manufacturer Part Number

PT6907-S

Description

Linear Dimming LED Driver with Switch On/Off

Manufacturer

PTC [Princeton Technology Corp]

Datasheet

1.PT6907-S.pdf (4 pages)

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Download datasheet (180Kb)

DESCRIPTION

The PT6907 is a buck LED driver which has linear

dimming function with normal switch ON/OFF. While

turning-on the switch first time, the LED current will

increase from the minimum value to the maximum

current during about 9 seconds. The PT6907 builds-in

exponential algorithm and the LED’s brightness

changes smoothly and linearly. During the dimming

processing, you can turn-off the switch when the

LED’s brightness reaches the level you want. The

PT6907 can remember and hold the status for a

certain time which is programmable after turned-off.

You should turn-on the switch again within this holding

time. Then the output stays at remembered level. If

you don’t turn-off the switch during dimming

processing, the output will increase to the maximum

value and hold the status finally.

The PT6907 also integrates 10bit DAC. It is flexible for

synchronous application. You can use only one switch

to control the group LED lamps. They change

synchronously using the power line AC clock.

The PT6907 operates in open loop current mode

control, and the controller achieves good output

current regulation without the need for any loop

compensation. Also, the PT6907 operates in constant

frequency mode. The frequency is set as 50KHz.

APPLICATIONS

BLOCK DIAGRAM

Tel: 886-66296288

• Offline LED Lamps and Fixtures

• Office and Home LED Lightings

• LED Table Lamps

• Signage and Decorative LED Lightings

‧

Fax: 886-29174598

‧

http://www.princeton.com.tw

Linear Dimming LED Driver with Switch On/Off

FEATURES

‧

• 8V to 12V Input Voltage Range

• Low Start-up Current

• Constant Frequency Operation, 50kHz typical

• Open Loop Peak Current Controller

• Linear Dimming with Normal Switch On/Off

• Programmable Holding Time

• Dimming with Exponential Algorithm, More

• 10bit DAC Integrated for Synchronous

• Normal Switch Compatible

• SOP8 Package

2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan

Suitable for Human Eyes.

Application, More Flexible for Group Control

Preliminary

PT6907

Related parts for PT6907-S

PT6907-S Summary of contents

Page 1

... DESCRIPTION The PT6907 is a buck LED driver which has linear dimming function with normal switch ON/OFF. While turning-on the switch first time, the LED current will increase from the minimum value to the maximum current during about 9 seconds. The PT6907 builds-in exponential algorithm and the LED’s brightness changes smoothly and linearly ...

Page 2

... TYPICAL APPLICATION PRE1.0 2 PT6907 October 2009 ...

Page 3

... NC No Connection Clock Input for DAC. This pin is connected to AC clock signal to change the output useful CLK for synchronous application in group control. PRE1.0 Package Type 8 Pins, SOP, 150MIL Description 3 PT6907 Top Code PT6907-S Pin No October 2009 ...

Page 4

... PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw PRE1.0 4 PT6907 October 2009 ...

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