TPS2346
SLUS529 MAY 2002
17
www.ti.com
TYPICAL CHARACTERISTICS
Figure 17
PRECHARGE OUTPUT VOLTAGE
vs
OUTPUT CURRENT, SOURCING
I
O(PCHG)
Output Current mA
8
7
5
0.4
0.9
1.1
0.5
0.6
0.7
0.8
1.0
6
4
2
3
1
0
V
I(VIN2)
= 4.75 V
V
I(VIN3)
= 3.30 V
V
I(VIN1)
= V
I(VIN4)
= FLOAT
T
A
= 25_C
Figure 18
PRECHARGE OUTPUT VOLTAGE
vs
OUTPUT CURRENT, SINKING
I
O(PCHG)
Output Current mA
0.8
1.0
1.1
1.2
1.4
0.9
1.3
2
0
4
8
6
10
12
14
16
V
I(VIN2)
= 5.25 V
V
I(VIN3)
= 3.30 V
V
I(VIN1)
= V
I(VIN4)
= FLOAT
T
A
= 25_C
APPLICATION INFORMATION
The connections to set up the TPS2346 for operation in an ONET plug-in are shown in the typical application
diagram.The TPS2346 works in conjunction with four external N-channel MOSFETs to provide isolation of the
back-end power planes when disabled, and to provide a low-impedance power path when the load voltages are
at the full-input dc potential. For proper operation, each channel of the device must be connected to the
appropriate supply as listed in Table 1.
Table 1. TPS2346 Channel to Back-Plane Supply Connections
TPS2346
CHANNEL
BACKPLANE
SUPPLY
1
5.15 V
2
5 V
3
3.3 V
4
5.2 V
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