Texas Instruments Evaluation Module for the TPS2113ADRB Power Multiplexer TPS2113AEVM-581 TPS2113AEVM-581 数据表
产品代码
TPS2113AEVM-581
www.ti.com
EVM Setup
2.2
Current-Limit Adjustment
Potentiometer R4 controls the resistance RILIM that sets the TPS211xA current limit threshold. Adjusting
R4 clockwise increases the current limit threshold by decreasing RILIM. The current limit threshold is
500/RILIM for the TPS2113A and TPS2115A.
R4 clockwise increases the current limit threshold by decreasing RILIM. The current limit threshold is
500/RILIM for the TPS2113A and TPS2115A.
To measure the resistance RILIM, connect an ohmmeter between test points TP4 and GND. The
measurement should be made with the IN1 and IN2 supplies off. To ensure accurate in-circuit resistance
measurements, the ohmmeter must apply no more than 0.5 V across the resistor.
measurement should be made with the IN1 and IN2 supplies off. To ensure accurate in-circuit resistance
measurements, the ohmmeter must apply no more than 0.5 V across the resistor.
2.3
Manual Switching Mode (TPS2115A Only)
Potentiometer R2 and header J4 do not affect the operation of the manual switching mode.
Some products like digital cameras and hand-held devices that receive power from an internal battery or
from a docking station can take advantage of the manual-switching feature. The TPS2115A digital control
input, D1, can directly sense the presence of the docking station and connect the load to the appropriate
power source.
from a docking station can take advantage of the manual-switching feature. The TPS2115A 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 TPS2115A 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.
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 TPS2113A
EVM only.
EVM 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.
the EVM for Mode 1 automatic switching.
Table 1. EVM Shorting Jumper Placement for Mode 1 Automatic Switching
HEADER
EVM
DEVICE
J1
J2
J3
J4
HPA581-001
TPS2113A
OUT
IN
OUT
OUT
HPA581-002
TPS2115A
OUT
OUT
IN
OUT
A manufacturer can provide a secondary battery pack option to extend the product run time with Mode 1
automatic switching. The TPS211xA cycles between the primary and secondary batteries until both
batteries are drained.
automatic switching. The TPS211xA cycles between the primary and secondary batteries until both
batteries are drained.
3
SLUU409 – February 2010
TPS211xADRB EVM, Power Multiplexer Evaluation Module
Copyright © 2010, Texas Instruments Incorporated