ACT4530

Rev 1.0, 19-Nov-2018

- 7 -

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Output Over Voltage Discharge

Discharge circuit starts to discharge output through

CSP pins when output over voltage is detected.

Discharge circuit brings 9V down to 5V in less than

100ms.

Output Under-Voltage Protection /

Hiccup Mode

The ACT4530 implements an under voltage

protection (UVP) threshold to protect against fault

conditions. If the output voltage is below UVP

threshold for more than 10us, an over current or

short circuit is assumed, and the converter goes into

hiccup mode by disabling the converter and

restarting after hiccup waiting period of 4.3s.

Thermal Shutdown

below 130°C.

 

Cord Compensation

The ACT4530 implements cord compensation to

account for voltage drops due to output cable

resistance. It accomplishes this by increasing the

output voltage with increasing output current. The

increased output voltage is measured at the CSP

pin.

The cord compensation voltage is derived as:

Where K=3.03

The cord compensation loop is very slow to avoid

disturbing to the voltage loop when there are load

transients.

 

FUNCTIONAL DESCRIPTION