CC TSON C×R (AQY2)
–8–
ASCTB359E 201505-T
CAUTIONS FOR USE
SAFETY WARNINGS
• Do not use the product under conditions
that exceed the range of its
specifications. It may cause overheating,
smoke, or fire.
• Do not touch the recharging unit while
the power is on. There is a danger of
electrical shock. Be sure to turn off the
power when performing mounting,
maintenance, or repair operations on the
device (including connecting parts such
as the terminal board and socket).
• Check the connection diagrams in the
catalog and be sure to connect the
terminals correctly. Erroneous
connections could lead to unexpected
operating errors, overheating, or fire.
1. Derating design
Derating is essential in any reliable
design and is a significant factor for
product life.
Even if the conditions of use
(temperature, current, voltage, etc.) of the
product fall within the absolute maximum
ratings, reliability can be reduced
remarkably when continually used under
high load (high temperature, high
humidity, high current, high voltage, etc.).
Therefore, please derate sufficiently
below the absolute maximum rating and
verify operation of the actual design
before use.
Also, if there is the possibility that the
inferior quality of this product could
possibility cause great adverse affect on
human life or physical property we
recommend that, from the perspective of
a manufacturer’s liability, sufficient
amount of derating to be added to the
maximum rating value and implement
safety measures such as fail-safe circuit.
2. Input voltage
For rising and dropping ratio of input
voltage(dv/dt), maintain min. 100mV/ms.
3. Applying stress that exceeds the
absolute maximum rating
If the voltage or current value for any of
the terminals exceeds the absolute
maximum rating, internal elements will
deteriorate because of the overvoltage or
overcurrent. In extreme cases, wiring
may melt, or silicon P/N junctions may be
destroyed.
Therefore, the circuit should be designed
in such a way that the load never exceed
the absolute maximum ratings, even
momentarily.
4. Oscillation circuit and control
circuit
The oscillation circuit and control circuit
of product may be destroyed by external
noise, surge, static electricity and so on.
For noise effect to peripheral circuits
when oscillation circuit operates, please
implement safety measures on the
system before use by verifying operation
under the actual design.
5. Deterioration and destruction
caused by discharge of static
electricity
This phenomenon is generally called
static electricity destruction, and occurs
when static electricity generated by
various factors is discharged while the
PhotoMOS
®
terminals are in contact,
producing internal destruction of the
element.
To prevent problems from static
electricity, the following precautions and
measures should be taken when using
your device.
(1) Employees handling PhotOMOS
®
should wear anti-static clothing and
should be grounded through protective
resistance of 500kΩ to 1MΩ.
(2) A conductive metal sheet should be
placed over the worktable. Measuring
instruments and jigs should be grounded.
(3) When using soldering irons, either
use irons with low leakage current, or
ground the tip of the soldering iron.
(Use of low-voltage soldering irons is also
recommended.)
(4) Devices and equipment used in
assembly should also be grounded.
(5) When packing printed circuit boards
and equipment, avoid using high-polymer
materials such as foam styrene, plastic,
and other materials which carry an
electrostatic charge.
(6) When storing or transporting
PhotoMOS
®
, the environment should not
be conducive to generating static
electricity (for instance, the humidity
should be between 45% and 60%), and
PhotoMOS
®
should be protected using
conductive packing materials.
6. Short across terminals
Do not short circuit between terminals
when device is energized, since there is
possibility of breaking of the internal IC.
7. Output spike voltages
1) If an inductive load generates spike
voltages which exceed the absolute
maximum rating, the spike voltage must
be limited.
Typical circuits of AC/DC dual use type
are shown below.
It is the same with DC only type.
2) Even if spike voltages generated at the
load are limited with a clamp diode if the
circuit wires are long, spike voltages will
occur by inductance. Keep wires as short
as possible to minimize inductance.
8. Reverse voltages at the input
If reverse voltages are present at the
input terminals, for example, connect a
schottky barrier diode in reverse parallel
across the input terminals and keep the
reverse voltages below the reverse
breakdown voltage. Typical circuit is
shown below.
9. Ripple in the input power supply
If ripple is present in the input power
supply, observe the following:
1) Please maintain the input voltage at
least 3V for E
min.
2) Please make sure the input voltage for
E
max. is no higher than 5.5V.
3) Please keep amplitude voltage of
ripple within ±0.5V.
1
2
3
4
1
2
3
4
Add a clamp diode
to the load
Add a CR snubber
circuit to the load
1
2
3
4
Emax.
Set voltage
within ±0.5V
within ±0.5V
Emin.
