Texas Instruments TPS22922 Load Switch Evaluation Module TPS22922EVM TPS22922EVM 데이터 시트
제품 코드
TPS22922EVM
4.1
Recommended Test Equipment
4.2
Calculating Voltage Drop and Load Current
Oscilloscope
Voltage
probe
probe
3.6 V, 2 A Max
7” twisted pair, #20 AWG
+
IN
–
+
OUT
–
EVM
Voltage
probe
probe
Chapter 4
SLVU286 – January 2009
EVM Setup
The following test equipment is recommended:
•
Two-channel storage oscilloscope
•
Current probe
•
Voltage probe
•
3.6 V at 2-A power supply
•
Volt-ohm meter
The user should read the applicable data sheet before using the EVM.
shows the EVM test setup for measuring input and output voltage. The load switch is enabled
into a passive on-board load for this measurement. After measuring the voltages at both V
IN
and V
OUT
, the
voltage drop across the switch as well as the load current can be calculated from the following equations:
V
DROP
= V
IN
– V
OUT
I
LOAD
= V
OUT
/ R
LOAD
Figure 4-1. EVM Setup For Calculating Voltage Drop and Load Current
SLVU286 – January 2009
EVM Setup
13