PP_5V0
VBUS
Fast
current
limit
PP_5V0 Gate Control
and Current Limit
PP_HV
Fast
current
limit
PP_HV Gate Control
and Current Limit
5A
RSENSE
10 mΩ ± 1%
NMOS
HV Gate Control and Sense
SENSEP
SENSEN
HV_GATE1
HV_GATE2
PP_EXT
PP_CABLE C_CC1
600mA
Fast
current
limit
C_CC2
3A
3A
C_CC2 Gate
Control
C_CC1 Gate
Control
C_CC1/2 Gate Control
and Current Limit
Figure 9-11. Port Power Paths
9.3.3.1 5V Power Delivery
The TPS65982 provides port power to VBUS from PP_5V0 when a low voltage output is needed. The switch
path provides 5 V at up to 3 A to from PP_5V0 to VBUS. Figure 9-11 shows a simplified circuit for the switch
from PP_5V0 to VBUS.
9.3.3.2 5V Power Switch as a Source
The PP_5V0 path is unidirectional, sourcing power from PP_5V0 to VBUS only. When the switch is on, the
protection circuitry limits reverse current from VBUS to PP_5V0. Figure 9-12 shows the I-V characteristics of the
reverse current protection feature. Figure 9-12 and the reverse current limit can be approximated using Equation
2.
IREV5V0 = VREV5V0/RPP5V
(2)
TPS65982
SLVSD02E – MARCH 2015 – REVISED AUGUST 2021
www.ti.com
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Product Folder Links: TPS65982
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