Time (200 Ps/div)
Current (A)
Voltage (V)
-2 -1
0 0
2 1
4 2
6 3
8 4
10 5
12 6
D005
I VBUS
VBUS
Figure 9-14. PP_5V0 Current Limit with a Hard Short (Extended Time Base)
Time (200 Ps/div)
Current (A)
Voltage (V)
0 0
1 1
2 2
3 3
4 4
5 5
6 6
D006
I VBUS
VBUS
Figure 9-15. PP_5V0 Current Limit with a Soft Short (2 Ω)
9.3.3.5 Internal HV Power Delivery
The TPS65982 has an integrated, bi-directional high-voltage switch that is rated for up to 3 Amps of current.
The TPS65982 is capable of sourcing or sinking high-voltage power through an internal switch path designed
to support USB-PD power up to 20 V at 3 A of current. VBUS and PP_HV are both rated for up to 22 V
as determined by Recommended Operating Conditions, and operate down to 0 V as determined by Absolute
Maximum Ratings. In addition, VBUS is tolerant to voltages up to 22 V even when PP_HV is at 0 V. Similarly,
PP_HV is tolerant up to 22 V while VBUS is at 0 V. The switch structure is designed to tolerate a constant
operating voltage differential at either of these conditions. Figure 9-11 shows a simplified circuit for the switch
from PP_HV to VBUS.
9.3.3.6 Internal HV Power Switch as a Source
The TPS65982 provides power from PP_HV to VBUS at the USB Type-C port as an output when operating as
a source. When the switch is on as a source, the path behaves resistively until the current reaches the amount
TPS65982
SLVSD02E – MARCH 2015 – REVISED AUGUST 2021
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