PoCL OCP - Overcurrent Protection
Each PoCL controller embeds an "Over Current Protection circuit": the OCP.
The OCP is based upon an electronic device that controls the current delivered to the load using:
- A dV/dt limiter
- A short-circuit current limiter
- An overload current limiter
- A thermal protection
The dV/dt limiter controls the output voltage rising slope. This limits the current during the charging of the load capacitor. The short circuit current limiter is effective when a short circuit event occur. It is also effective during the charging of the load capacitor since during that phase, the load is equivalent to a short circuit.
The overload current limiter is effective when during normal operation, the load current increases excessively; when the overload level is reached, the overload current limiter will automatically reduce the current to the short circuit level.
The thermal protection limits the temperature of the electronic device by opening the circuit until the device temperature reduces sufficiently.
PoCL OCP characteristics
Parameter |
Min |
Typ |
Max |
Units |
Output voltage slew rate |
|
0.15 |
|
V/ms |
Short circuit current limit |
0.6 |
1 |
1.8 |
A |
Overload current limit |
3.1 |
3.2 |
3.5 |
A |