JAJSHI3C March 2019 – October 2019 TPS23881
PRODUCTION DATA.
Unlike Auto mode, which still requires a host to initialize the TPS23881 operation through a a series of I2C commands, there is no host or I2C communication required when the TPS23881 in configured in Autonomous mode.
Connecting a resistor between the AUTO pin and GND based on the table below will enable autonomous mode and configure all of the ports to the same Power Allocation settings. In the event a PD is connected with a higher requested class than the autonomous mode configuration, the port will power demote the PD to the selected autonomous mode configuration power level. The port automatically performs detection and classification (if valid detection occurs) continuously on all ports. Port power is automatically turned on based on Power Allocation settings in register 0x29 if a valid classification is measured.
Auto Pin | Autonomous Mode Configuration |
---|---|
Open/Floating | Disabled |
124 kΩ | 2-pair 15 W |
62 kΩ | 2-pair 30 W |
35.7 kΩ | 4-pair 30W |
22.6 kΩ | 4-pair 45W |
15.8 kΩ | 4-pair 60W |
11 kΩ | 4-pair 75W |
7.7 kΩ | 4-pair 90W |
SPACE
NOTE
A 10 nF capacitor is required in parallel with RAUTO to ensure stability in the Autonomous mode selection.