
MAX5943
FireWire Current Limiter and Low-Drop
ORing Switch Controller
18 ______________________________________________________________________________________
Figure 13. Two-Port FireWire Power Provider Using MAX5943A and MAX5944
SENSE GATE1
OR_ADJONQ1GNDLATCH
GATE2 OUTIN
MAX5943A
TIM
ON
ILIM
FAULT
15mΩ
SI7958DP SI7958DP
SENSE GATE1
OR_ADJONQ1GNDLATCH
GATE2 OUTIN
MAX5943A
TIM
ON
ILIM
FAULT
15mΩ
SI7958DP SI7958DP
SENSEA GATE1A GATE2A OUTAINA
MAX5944
ONA
ONQ1
GND
ONB
FAULTA
FAULTB
30mΩ
SI7958DP SI7958DP
30mΩ
IRF7478 IRF7478
MAX5033
SGND
V
IN
ON
FB
GND
VD
IN4148 IN4148
IN4148
BST
LX
PHY
POWER OUT
CABLE
ON
NOT
SLEEP
CURRENT-LIMIT
SENSE
PORT 1
SENSE
PORT 0
SENSE
CABLE
POWER
SOURCE
BATTERY-POWER
SOURCE
IN4148
CPA SENSE
PORT 0
PORT 1
SENSEB GATE1B GATE2B OUTBINB
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