8751-CA-NS GE Module card controller equipment

Product Details

Product Description

Product Description
8751-CA-NS GE Module card controller equipment
8751-CA-NS GE Module card controller equipment
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The A, C and E types of the S-8520/8521 Series have a built-in overload protection circuit.
If the output voltage drops under the overload status, the maximum duty status (100%) continues. If this 100% duty
status lasts longer than the overload detection time (tpro), the circuit keeps the EXT pin at “H” to protect the
switching transistor and inductor. When the overload protection circuit is functioning, the soft start works in the IC
for the reference voltage, and the reference voltage rises slowly from 0 V. The reference voltage and the feedback
voltage obtained by dividing the output voltage are compared to each other. While the reference voltage is low, the
EXT pin keeps “H” and oscillation stops. If the reference voltage rises and exceeds the feedback voltage, oscillation
restarts.
After oscillation is restarted, if a load is heavy and the EXT pin keeps the “L” level longer than the overload
detection time (tpro), the circuit operates again, and the IC enters the intermittent operation mode by repeating the
action described above. Once the overload state is off, the IC restarts the normal operation.