The 5V power output of pin 9 of US232P comes from the USB interface. The US232P chipset itself draws about 90mA of power. Assuming that the USB port provides 500mA power to US232P, theoretically the 5V power output of pin 9 of US232P is 410mA (500mA minus the 90mA consumed by the US232P chipset itself).
Therefore, the maximum rated current of US232P is the power supply current provided by the USB interface deducting 90mA.
Furthermore, if the connected RS232 device is running with more than 500mA, the US232P short circuit protection will activate and stop working for a few seconds.
Customization for more than 500mA of 5V power output on the 9th pin, please contact us.
| Available power from USB port | The 9th pin ensured power output | Short Circuit Protection activates at | Remark |
| 500 mA | 410 mA | 750 mA ~ 1000 mA | Standard |
| 750 mA | 660 mA | 1125 mA ~ 1500 mA | Customized |
| 1100 mA | 1010 mA | 1650 mA ~ 2200 mA | Customized |
