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In the Innoline series, how does the continuous short circuit protection operate?

The Innoline series all use intelligent controllers that measure the output current on each switching cycle (Current Mode Control). If the output is overloaded, the converter will deliver the over-current until either the converter overheats and shuts itself down (thermal protection) or the load current exceeds the safe limits. If the output is short circuited, the controller shuts down the output drive circuitry. The output condition is continuously monitored and the converter automatically restarts.

 

Kategorie: protection, short circuit, continuous short circuit protection, innoline, switching regulator

In the Econoline unregulated series (/P option), how does the continuous short circuit protection operate?

If the output is overloaded, the FET series resistor limits the maximum output current. But if the output is short circuited (<0.1 Ohm), an additional mechanism comes into effect: The magnetic coupling between the primary winding and the feedback winding is disturbed by the shorted secondary winding. The result is to reduce the output current still further to create a current fold back characteristic. Once the short is removed, the magnetic coupling between the primary and feedback coils is re-established and the converter reverts to normal operation.

 

Kategorie: protection, short circuit, unregulated, regulated, continuous short circuit protection

Does the AC/DC family have a thermal protection?

The controller IC has an internal thermal shutdown at 135°C (-10°/+15°C). Once in thermal protection, the controller IC must cool down below 65°C before it will restart.

 

Kategorie: protection, AC/DC, thermal

In the Powerline series, how does the continuous short circuit protection operate?

The Powerline series all use hiccup overload protection. If the output is overloaded or short circuited, the output is turned off to protect the converter. After a short delay, the output is restarted. If the short circuit condition still exists, the output is again disabled. This cycle continues until the fault condition is removed. The output thus “hiccups” every half second or so.

 

Kategorie: protection, short circuit, continuous short circuit protection, powerline, hiccup, power

Are your parts short circuit protected?

All products from the Powerline and the Innoline include continuous short-circuit protection. The Econoline offers this feature as an option. Even the low power unregulated converters can provide short-circuit protection (you just need to add /P to the part number), which is a unique feature in the market for this range of products.

 

Kategorie: protection, short circuit

Do RECOM products have reverse polarity protection?

Reverse polarity protection is not built inside any of the converters. It needs to be added externally. We recommend adding an external MOSFET for higher power converters or a simple blocking diode for lower power, non-critical applications.

 

Kategorie: protection, reverse polarity