Pam2810, Application information, Ordering information – Diodes PAM2810 User Manual
Page 8
PAM2810
Document number: DSxxxxx Rev. 1 - 1
8 of 11
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October 2012
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PAM2810
A Product Line of
Diodes Incorporated
Application Information
(cont.)
Power Dissipation
The maximum allowable power dissipation that the package is capable of handling can be determined as follows:
JA
A
)
MAX
(
J
DMAX
/
)
T
T
(
R
θ
−
=
Where T
J(MAX)
is the maximum junction temperature, T
A
is the ambient temperature, and θ
JA
is the junction-to-ambient thermal resistance of the
specified package. The DFN 2x2 package has a θ
JA
of 80°C/W and the SOT23-8 250°C/W. This value of θ
JA
is highly dependant upon the layout
of the PCB. The actual power dissipated by the PAM2810 follows the equation:
)
I
*
V
(
N
)
I
*
V
(
P
LEDX
DIODE
IN
IN
DISS
−
=
Where N equals the number of active outputs, V
DIODE
is the LED forward voltage, and I
LEDX
is the current supplied to the LEDx.
Input Capacitor Selection
The PAM2810 is designed to work under a stable input voltage. To ensure the stability of input, it may be necessary to add a small input
capacitor to help filter out any noise that probably appears on the line. Surface-mount multi-layer ceramic capacitors are recommended, which
are small and inexpensive. A capacitance of 0.1µF is typically sufficient.
Ordering Information
Part Number
Marking
Package Type
Standard Package
PAM2810AG
EJXYW
DFN 2x2-8
3000 Units/Tape&Reel
PAM2810BA EJXYW SOT23-8
3000
Units/Tape&Reel