Texas Instruments TPS2543EVM, Руководство пользователя, Страница: 5 / 21

TPS2543EVM
J2 J3
D1
D3
PC (USB charging source)
PD
J1 D2
J3
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General Configuration and Description
Table 4. TPS2543 Mode Truth Table
CTL1 CTL2 CTL3 ILIM_SEL Mode
0 0 0 X OUT discharge, power switch OFF
0 0 1 0 Dedicated charging port, auto-detect, without power-wake function
0 0 1 1 Dedicated charging port, auto-detect, with power wake function
(1)
0 1 1 0 Dedicated charging port, auto-detect, with load detection disabled
0 1 1 1 Dedicated charging port, auto-detect, with load detection enabled
(2)
1 0 0 X Dedicated charging port, BC 1.2 only, ILIM_HI or ILIM_LO is selected to set I
OS
by ILIM_SEL.
1 0 1 X Dedicated charging port, Divider1 mode only, ILIM_HI or ILIM_LO is selected to
set I
OS
by ILIM_SEL.
X 1 0 X Standard downstream port, USB 2.0 mode, ILIM_HI or ILIM_LO is selected to
set I
OS
by ILIM_SEL.
1 1 0 1 Standard downstream port, USB 2.0 mode, ILIM_LO is selected to set I
OS
, no
discharge to or from 1111
1 1 1 1 Charging downstream port, BC 1.2, with load detection enabled
(2)
(1)
Current limit (I
OS
) is automatically changed, I
OS
is I
OS_PW
while no load, I
OS
is switched to the value set by ILIM_HI and STATUS is
active-low while with load
(2)
ILIM_HI is selected to set I
OS
, ILIM_LO is selected to set load-detection current threshold (I
LD
)
3.2 Test Setup
Figure 2 shows a typical test setup for TPS2543EVM. Connect J2 to the PC either directly (insert J2 into
available/accessible PC USB port) or using any Type A Male to Type A Female USB v2.0 extension cable.
USB power and data are available at J3.
Figure 2. Typical TPS2543EVM Test Setup
5 SLVU660 – February 2012 TPS2543EVM User ' s Guide
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