Datasheet

Manual Switching Mode (TPS2110/1/4/5 Only)
2-3
EVM Setup
2.3 Manual Switching Mode (TPS2110/1/4/5 Only)
Potentiometer R2 and header J4 have no effect upon the operation of the
manual switching mode.
Some products like digital cameras and palm computers that receive power
from an internal battery or from a docking station can take advantage of the
manual-switching feature. The TPS2110/1/4/5 digital control input, D1, can
directly sense the presence of the docking station and connect the load to the
appropriate power source.
2.3.1 Configuring the TPS2110/1 for Manual Switching
To place the device into manual switching mode, short header J1. The logic
level on the D1 pin now determines which input is selected. On the EVM,
header J2 controls the D1 pin. If J2 is left open, then D1 is internally pulled high
and IN1 is selected. If J2 is shorted, then D1 is pulled low and IN2 is selected.
2.3.2 Configuring the TPS2114/5 for Manual Switching
To place the device into manual switching mode, short header J2. The logic
level on the D1 pin determines which input is selected. On the EVM, header
J3 controls the D1 pin. If J3 is left open, then D1 is internally pulled high and
IN1 is selected. If J3 is shorted, then D1 is pulled low and IN2 is selected.
2.4 Automatic Switching Modes
All EVMs support Mode 1 automatic switching. Mode 2 automatic switching is
supported by the TPS2110–TPS2113 EVMs only.
2.4.1 Mode 1 Automatic Switching
OUT connects to the higher of IN1 and IN1 in Mode 1 automatic switching.
Refer to Table 2-1 to configure the EVM for Mode 1 automatic switching.
Table 2-1.EVM Shorting Jumper Placement for Mode 1 Automatic Switching
Header
EVM Device
J1 J2 J3 J4
SLVP227-001 TPS2110 X
SLVP227-002 TPS2111 X
SLVP227-003 TPS2112 X
SLVP227-004 TPS2113 X
SLVP227-005 TPS2114 X
SLVP227-006 TPS2115 X
A manufacturer can provide a secondary battery pack option to extend the
product run time with Mode 1 automatic switching. The TPS211x cycles
between the primary and secondary batteries until both batteries are drained.