DD331 SITI [Silicon Touch Technology Inc.], DD331 Datasheet - Page 8

• Manufacturer Part Number: DD331
• Description: 4-Channel Flexible LED Pre-Driver
• Manufacturer: SITI [Silicon Touch Technology Inc.]

Typical Application
Application Notice
lot. For example, when Rext=5Ω Iout= 104mA, if Rwire=1Ω, than Iout will decrease
1.96%. Due to large current flow through rext, it needs high power resistor to apply to
prevent element burn out issue.
Dissipation Ratings
Power Dissipation
ambient temperature, in which the device requires the maximum output current calculated
for given operating conditions. The maximum allowable power consumption can be
calculated by the following equation:
PACKAGE
SSOP16
SOP16
Notice the Rext applies to lower than 5 Ω, the wire resistance(Rwire) will affect Iout a
Notice that the power dissipation of a semiconductor chip is limited to its package and
Pd(max)(Watt) =
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
High CONSTANT CURRENT LED DRIVERS
POWER DISSAPATION
( Tj_max=150
Tj(junction temperature)(max)( C) - Ta(ambient temperature)( C)
1.7 W
1.5 W
DD331
Rth(junction- to- air thermal resistance)( C/Watt)
o
C )
°
( Rth
THERMAL RESISTANCE
Version:A.002
(junction-to-air)
72.1
82
o
C/W
°
o
C/W
, Ta=25
o
C )
°
DD331
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