+
2.0V
-
100
:
100
:
4.2V coin cell
36
:
Test and Measurment Summary
3.1.3
Buck Converter Load Transient
The test setup is shown in
. The specific equipment used for the test results in
is listed
below:
1. VIN_DC was connected to a low impedance power supply by a series 100-
Ω
resistor. JP4 sets the
MPPT voltage to 50% of VIN_OC.
2. VOUT was connected to a switch with a series resistor that switches in a 36
Ω
resistor.
3. VBAT was connected a 3.2-V charged 4.2-V coin cell.
4. VSTOR, VOUT and VIN_DC was monitored by oscilloscope voltage scope probes attached to TP4,
TP6, and TP1 respectively, and GND. IOUT was measured with a current probe.
Figure 7. Test Setup for Performing Load Transient on Buck Output
Figure 8. 50-mA Load Transient on V
OUT
12
User's Guide for bq25570 Battery Charger Evaluation Module for Energy
SLUUAA7A – July 2013 – Revised August 2014
Harvesting
Copyright © 2013–2014, Texas Instruments Incorporated
