PS9332L, PS9332L2

Chapter Title

R08DS0105EJ0100 Rev.1.00

Page 16 of 18

Sep 06, 2013

2. Cautions regarding noise

Be aware that when voltage is applied suddenly between the photocoupler’s input and output at startup, the output

transistor may enter the on state, even if the voltage is within the absolute maximum ratings.

USAGE CAUTIONS

1. This product is weak for static electricity by designed with high-speed integrated circuit so protect against static

electricity when handling.

2. Board designing

(1) By-pass capacitor of more than 1.0

between the leads of the photocoupler and capacitor is no more than 10 mm.

(2) When designing the printed wiring board, ensure that the pattern of the IGBT collectors/emitters is not too close

to the input block pattern of the photocoupler.

If the pattern is too close to the input block and coupling occurs, a sudden fluctuation in the voltage on the IGBT

output side might affect the photocoupler’s LED input, leading to malfunction or degradation of characteristics.

(If the pattern needs to be close to the input block, to prevent the LED from lighting during the off state due to

the abovementioned coupling, design the input-side circuit so that the bias of the LED is reversed, within the

range of the recommended operating conditions, and be sure to thoroughly evaluate operation.)

Unconnected pins should not be used as a bypass for signals or for any other similar purpose because this may

degrade the internal noise environment of the device.

Note: *1. NC: Non-Connection (No Connection).

3. Make sure the rise/fall time of the forward current is 0.5

μs or less.

4. In order to avoid malfunctions, make sure the rise/fall slope of the supply voltage is 3 V/

μs or less.

5. Avoid storage at a high temperature and high humidity.

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