STR-A605XM Datasheet, PDF (12/13 Pages) Sanken electric – PWM Off-Line Switching Regulator ICs

STR-A6000M
Series
PWM Off-Line Switching Regulator ICs
Operating Precautions
In the case that you use Sanken products or design your prod-
ucts by using Sanken products, the reliability largely depends
on the degree of derating to be made to the rated values. Derat-
ing may be interpreted as a case that an operation range is set
by derating the load from each rated value or surge voltage or
noise is considered for derating in order to assure or improve
the reliability. In general, derating factors include electric
stresses such as electric voltage, electric current, electric power
etc., environmental stresses such as ambient temperature,
humidity etc. and thermal stress caused due to self-heating of
semiconductor products. For these stresses, instantaneous val-
ues, maximum values and minimum values must be taken into
consideration. In addition, it should be noted that since power
devices or IC’s including power devices have large self-heating
value, the degree of derating of junction temperature affects the
reliability significantly.
Because reliability can be affected adversely by improper stor-
age environments and handling methods, please observe the
following cautions.
Cautions for Storage
• Ensure that storage conditions comply with the standard tem-
perature (5 to 35°C) and the standard relative humidity (around
40 to 75%); avoid storage locations that experience extreme
changes in temperature or humidity.
• Avoid locations where dust or harmful gases are present and
avoid direct sunlight.
• Reinspect for rust on leads and solderability of the products
that have been stored for a long time.
Cautions for Testing and Handling
When tests are carried out during inspection testing and other
standard test periods, protect the products from power surges
from the testing device, shorts between the product pins, and
wrong connections. Ensure all test parameters are within the
ratings specified by Sanken for the products.
Remarks About Using Silicone Grease with a Heatsink
• When silicone grease is used in mounting the products on a
heatsink, it shall be applied evenly and thinly. If more silicone
grease than required is applied, it may produce excess stress.
• Volatile-type silicone greases may crack after long periods of
time, resulting in reduced heat radiation effect. Silicone greases
with low consistency (hard grease) may cause cracks in the
mold resin when screwing the products to a heatsink.
Our recommended silicone greases for heat radiation purposes,
which will not cause any adverse effect on the product life, are
indicated below:
Type
G746
YG6260
SC102
Suppliers
Shin-Etsu Chemical Co., Ltd.
Momentive Performance Materials Inc.
Dow Corning Toray Co., Ltd.
Soldering
• When soldering the products, please be sure to minimize the
working time, within the following limits:
260 ± 5 °C
10 ± 1 s (Flow, 2 times)
380 ± 10 °C 3.5 ± 0.5 s (Soldering iron, 1 time)
• Soldering should be at a distance of at least 1.5 mm from the
body of the products.
Electrostatic Discharge
• When handling the products, the operator must be grounded.
Grounded wrist straps worn should have at least 1MΩ of resis-
tance from the operator to ground to prevent shock hazard, and
it should be placed near the operator.
• Workbenches where the products are handled should be
grounded and be provided with conductive table and floor mats.
• When using measuring equipment such as a curve tracer, the
equipment should be grounded.
• When soldering the products, the head of soldering irons or
the solder bath must be grounded in order to prevent leak volt-
ages generated by them from being applied to the products.
• The products should always be stored and transported in
Sanken shipping containers or conductive containers, or be
wrapped in aluminum foil.
STR-A6000M-DS
SANKEN ELECTRIC CO., LTD.
12
January 8, 2013