Technical Reference Notes
ALD12/18/20/25 Series
(Single Output 16
th
Brick)
MODEL: ALD12/ 18/20/ 25 SERIES SHEET 19 OF 20
AUGUST 17, 2005 – REVISION C
Mechanical Specifications (continued)
Figure 43B. Mechanical Outline – SMT (Solder Ball) Termination.
SOLDERIN G CONSIDERATIONS
The through hole terminated converters are
compatible with standard wave soldering techniques.
When wave soldering, the converter pins should be
preheated for 20-30 sec at 110°C and wave soldered
at 260°C for less than 10 sec.
When hand soldering, the iron temperature should be
maintained at 425°C and applied to the converter pins
for less than 5 seconds. Longer exposure can cause
internal damage to the converter. Cleaning can be
performed with cleaning solvent IPA or with water.
For SMT terminated modules, refer to Figure 44 for
the recommended reflow profile.
Figure 44. Recommended reflow profile for SMT modules.
RECOM M ENDED REF LOW PROFI L E
0
20
40
60
80
100
120
140
160
180
200
220
240
0 30 60 90 120 150 180 210 240 270 300
TIME (se conds)
TEMPERAT URE (deg C)
PRE-HEAT ZONE
120 - 180 sec
REFLOW
ZONE
< 80 sec
110°
°°
°C
183°
°°
°C
PEAK TEMPERAT
RE
2
°
°°
°
- 2
°
°°
°
L
PE
< 4°
°°
°C /sec
0.06 [1.4]
0.30 [7.6]
0.30 [7.6]
0.10 [2.5]
0.15 [3.8]
0.90 [22.9]
0.36 [9.0]
0.60 [15.2]
0.45 [11.4]
0.15 [3.8]
0.30 [7.6]
0.15 [3.8]
1.10 [27.9]
PIN SIDE DOWN
PIN SIDE UP
0.18 [4.6]
SIDE VIE W
1.30 [33.0]
Pin 1 Pin 8
