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259481A Marking, TPS259481AYWPR Datasheet(PDF) 41 Page - Texas Instruments

Part # TPS259481AYWPR
Description  TPS25948xx 3.5-V–23-V, 12.2-mΩ, 8-A eFuse With Bi-directional Power Delivery
PDF  56 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS259481AYWPR Datasheet(HTML) 41 Page - Texas Instruments

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TPS259480x
IN
OUT
EN/UVLO
VIN1
VOUT
COUT
OVLO
SPLYGD
VLOGIC
TPS259480x
IN
OUT
EN/UVLO
VIN2
OVLO
SPLYGD
FLT
FLT
IN1 supply active
IN2 supply active
ILM
dVdt
GND
ITIMER
ILM
dVdt
GND
ITIMER
VLOGIC
Figure 9-17. Priority Power MUXing With 2 × TPS259480x - Option 2
Another variation of the previous configuration ensures minimum quiescent current on the auxiliary channel while
primary channel is active, but at the cost of additional N-FET to drive the EN/UVLO pin of auxiliary path device
as shown in Figure 9-18. At the same time, it has a higher switchover delay from primary to auxiliary supply as
compared to the previous configuration.
TPS259480x
IN
OUT
EN/UVLO
VIN1
VOUT
COUT
OVLO
SPLYGD
VLOGIC
TPS259480x
IN
OUT
EN/UVLO
VIN2
OVLO
SPLYGD
FLT
FLT
IN1 supply active
IN2 supply active
ILM
dVdt
GND
ITIMER
ILM
dVdt
GND
ITIMER
VLOGIC
Figure 9-18. Priority Power MUXing With 2 × TPS259480x - Option 3
While switching from a higher supply rail to lower supply rail, the minimum bus voltage can be calculated using
Equation 17. Here, the switchover time is equal to the time taken by the device to come out of reverse current
blocking state (tSWRCB).
VOUT,min (V) = min (VIN1, VIN2) ‐ VFWDTH (V) ‐ tSWRCB (µs) × ILOAD (A)
COUT (µF)
(17)
While switching from a lower supply rail to higher supply rail, the minimum bus voltage can be calculated using
Equation 18. Here, the switchover time (tSW) is the time taken by the device to turn on fully and start delivering
www.ti.com
TPS25948
SLVSGT9A – FEBRUARY 2023 – REVISED SEPTEMBER 2023
Copyright © 2023 Texas Instruments Incorporated
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