Test Setups And Results; Test Setup For Measuring Boost Charger Efficiency - Texas Instruments bq25505 User Manual

Test and Measurement Summary
3.1

Test Setups and Results

3.1.1 Boost Charger Efficiency
The test setup is shown in
Figure 4 is listed below:
1. VIN_DC was connected to a Keithley 2420 source-meter configured as a current source with voltage
compliance (clamp) set to the open circuit voltage.
2. VSTOR was connected a Keithley 2420 source-meter configured as a voltage source set to the
VSTOR voltage. The current sunk by the source-meter was the output current of the charger.
3. VREF_SAMP was connected to a power supply configured to output the desired input voltage
regulation point (that is, the MPPT% times the HiZ source's VOC). No jumper is required on JP4.
configured
as current
Figure 2. Test Setup for Measuring Boost Charger Efficiency
8
User's Guide for bq25505 Battery Charger Evaluation Module for Energy
Harvesting
BAT+
R1
GND
Figure 2. The specific equipment used for the test results in
SM1
SM1
Source +
meter
source
-
Copyright © 2013, Texas Instruments Incorporated
D1
C A
SM2
SM2
Source (Sink)
meter
+
configured
-
as voltage
source
+ -
- +
Power Supply set to
desired input voltage
regulation point
(that is, MPPT% × VOC)
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Figure 3 and
SLUUAA8 – September 2013
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