Datasheet

Setting Up the EVM
2-2
2.1 Setting Up the EVM
The user is encouraged to read the applicable TPS211x data sheet before
using the EVM.
The following test equipment is recommended:
- Storage oscilloscope
- Current probe
- Two adjustable power supplies, 0V – 6 V @ 2-A
- Volt-Ohm meter
- A passive or active load
Figure 2-1 shows the EVM test set up.
Figure 2-1. Basic EVM Setup
V
1
V
2
R
L
V
1
V
2
R
L
2.2 Current-Limit Adjustment
Potentiometer R4 controls the resistance R
ILIM
that sets the TPS211x current
limit threshold. Adjusting R4 clockwise increases the current limit threshold by
decreasing R
ILIM
. The current limit threshold is 250/R
ILIM
for the TPS2110,
TPS2112, and TPS2114 and 500/R
ILIM
for the TPS2111, TPS2113, and
TPS2115.
To measure the resistance R
ILIM
, 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.