DD313 SITI [Silicon Touch Technology Inc.], DD313 Datasheet - Page 8

• Manufacturer Part Number: DD313
• Description: 3-CHANNEL HIGH CONSTANT CURRENT LED DRIVER with ERROR DETECTION
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Alarm Function
pin. The ALARM pin is kept ‘H’ for normal conditions, and shifted to ‘L’ if there is any failure like
LED open, overheating or both occurrence. User can determine the different status from the truth
table below:
Thermal Alarm and Shutdown
pin will shift to low level and produce a warning signal. Suggested cooling measures is to start the
fan, lower the output currents and etc. If no cooling measures were activated, the junction
temperature might continue to rise. Once it reaches approximately above 180℃, it will cause the
driver to shutdown all the outputs. Basically, the IC will cool down and return to the safe operating
temperature which is approximately below 110℃. The ALARM pin will reset to high level, disable
the warning, and restart all the outputs at the same time. Operation in the thermal situation for a long
time may cause chip damage permanently.
3-CHANNEL HIGH CONSTANT CURRENT LED DRIVER
It can detect the operating status by connecting a pull-high resistor to the open-drain ALARM
During operation, when the junction temperature of the IC will reach about 110℃, the ALARM
ALARM
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC
新竹市科學園區展業一路 9 號 7 樓之 1
Tel：[phone]
9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C.
H L
H L
H L
H L
H
Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Fax：[phone]
未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任
don’t care
ENR
H
L
L
L
.
don’t care
ENG
H
L
L
L
don’t care
ENB
H
L
L
L
OUTR LED Open or Thermal issue
OUTG LED Open or Thermal issue
OUTB LED Open or Thermal issue
Version: A.003
Thermal Alarm or Shutdown
Normal Operation
Status
DD313
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