RDS Power-One, RDS Datasheet - Page 9

• Manufacturer Part Number: RDS
• Description: Rds Dc-dc Series Rds Dc-dc Series
• Manufacturer: Power-One

Surface Mount Assembly
Soldering:
The following instructions must be observed when
soldering the unit.
instructions may result in failure or significant
degradation of the module performance. Power-One
will not honor any warranty claims arising from failure
to observe these instructions.
This product is approved for forced convection reflow
soldering only.
The curves below define the maximum peak reflow
temperature permissible measured on Pins 1 and 10
of the converter.
The
temperature glass filled, UL94V0 flame retardant,
diallyl ortho-phthalate moulding compound commonly
used for packaging of electronics components. It has
passed NASA outgassing tests and is certified to
MIL-M-14. The coefficient of thermal expansion is
equivalent to FR4.
The gull wing leads are formed to ensure optimal
solder joint strength and structure. Furthermore they
facilitate visual inspection (manual or automatic).
The leads are formed from a 97% Cu alloy plated
with Cu and Sn 90. This material is commonly used
in the manufacture of integrated circuits. It has good
corrosion resistance and exhibits the nobility inherent
to all high copper alloys. Unlike brasses, this material
is essentially immune to stress corrosion cracking. It
also exhibits excellent solderability.
wetted by solders and performs well in standard
solderability tests. (Dip of Class II or better).
The product is manufactured with a patented
process, which is fully automated, and ‘in-line’. This
ensures that there is no contamination or mechanical
stress on the lead-frame so that the co planarity and
solderability are maintained.
The product is shipped in JEDEC trays to ensure
preservation of the co-planarity and enable fully
automated assembly in the final application (within
0.1mm).
NOV 11, 2005 revised to JUN 29, 2006
Mechanical Drawings
lead-frame
is
constructed
Failure to observe these
from
It is readily
a
high
Page 9 of 12
20W SMT Converter
.
Pick & Place Assembly:
The product is designed with a large flat area in the
center of the top surface to serve as a pick up point for
automated vacuum pick and place equipment. The
‘open board’ construction of the unit ensures that
weight is kept to a minimum. However due to the
relatively large size of the component, a large nozzle
(> 8.0mm, depending on vacuum pressure) is
recommended for picking and placing.
The unit may also be automatically handled using
‘odd-form’ placement equipment, with mechanical
grippers. For this type of equipment the end edges of
the device, which have no leads and also feature the
greatest dimensional accuracy, should be used as
pick-up points.
300
250
200
150
100
50
0
245
240
235
230
225
220
215
210
205
200
Peak temp. at pins 1 and 10 (ºC)
Restriction curve above 215ºC
Max. temp. on pins 1 and 10 during reflow
soldering (deg C)
RDS DC-DC Series Data Sheet
10
Peak Temperature
(See fig below)
20
tp
•
30
1.8V to 5V Output
Note:- mm[inches]
190 – 450 s
40
Tolerances: -
10-100 ±0.2
0.5-10 ±0.1
www.power-one.com
50
Time (s)
60
tp (s)