User Manual

PAM2810
Document number: DSxxxxx Rev. 1 - 1
8 of 11
www.diodes.com
October 2012
© Diodes Incorporated
PAM2810
A
Product Line o
f
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(JDMAX
/)
TT
(
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
LEDXDIODEININDISS
−=
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