Texas Instruments TPS25810EVM-745, User Manual

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TPS25810 Output Signals
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7 TPS25810 Output Signals
7.1 Fault Detected (FAULT#)
There are two conditions that can cause this fault signal to occur. Those two conditions are:
1. The output of the TPS25810 exceeds the programmed current threshold
2. The device exceeds the temperature threshold
As soon as the current and the temperature go back into normal ranges the fault is cleared and the device
resumes normal operation.
Refer to Electrical Characteristics section located in the TPS25810 data sheet, SLVSCR1 , for more
information on the current and temperature thresholds.
7.2 Load Detected (LD_DET#)
When the device is in high current charging mode (set when the CHG and CHG_HI pins are pulled to
Vaux or logic HIGH) the device will monitor the charging current. As soon as the current exceeds 1.95 A
(typical) the LD_DET pin will be asserted.
When activated, this signal can be used to warn a microprocessor or even another TPS25810 device to
avoid over current or over power from the power source.
7.3 Upstream Facing Port Connected (UFP#)
This pin is active when an upstream facing port (UFP) device is connected to the port and is
communicating properly through the CC lines. Refer to
Table 2 to see what conditions for the CC lines are
necessary to activate this mode.
Table 2. TPS25810 Response based on Port Connection Type
TPS25810 RESPONSE
TPS25810 PORT CC1 CC2 OUT
VCONN ON
POL# UFP# AUDIO# DEBUG#
CC1 OR CC2
Nothing Attached OPEN OPEN OPEN NO HI-Z HI-Z HI-Z HI-Z
UFP Connected Rd OPEN IN1 NO HI-Z LOW HI-Z HI-Z
UFP Connected OPEN Rd IN1 NO LOW LOW HI-Z HI-Z
Powered Cable/ NO
OPEN Ra OPEN NO HI-Z HI-Z HI-Z HI-Z
UFP Connected
Powered Cable/ NO
Ra OPEN OPEN NO HI-Z HI-Z HI-Z HI-Z
UFP Connected
Powered Cable/ UFP
Rd Ra IN1 CC2 HI-Z LOW HI-Z HI-Z
Connected
Powered Cable/ UFP
Ra Rd IN1 CC1 LOW LOW HI-Z HI-Z
Connected
Debug Accessory
Rd Rd OPEN NO HI-Z HI-Z HI-Z LOW
Connected
Audio Adapter
Ra Ra OPEN NO HI-Z HI-Z LOW HI-Z
Accessory Connected
7.4 Polarity (POL#)
Introduced in USB Type-C is the reversible USB port. The TPS25810 resolves the orientation of the USB
Type-C plug when a UFP device is connected. When there is no UFP device connected, the POL pin will
remain deasserted. Refer to Table 1 to see what conditions for the CC lines are necessary to activate this
mode.
12 TPS25810EVM-745 User's Guide SLVUAI0A – September 2015 – Revised September 2015
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