Texas Instruments bq2425xEVM-150, Руководство пользователя

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E
ff
ici
e
n
cy
(
%
)
Output Current (mA)
VIN = 5V
VIN = 7V
VIN = 10V
C001
V
IN
= 5 V
V
IN
= 7 V
V
IN
= 10 V
V
REG
= 4.2 V
Test Results
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6 Test Results
6.1 Output Regulation Ripple
The test results shown in Figure 6 and Figure 7 are taken under 6-V input, 3.8-V battery and heavy and
light charging currents.
Figure 6. Output Regulation Ripple at ICHG = 1000 mA
Figure 7. Output Regulation Ripple at ICHG = 120 mA
6.2 Efficiency Data
Figure 8 illustrates the efficiency when the device is regulating the battery voltage (constant voltage
charge region). Here the charge current was set to 2 A and the BAT pin was loaded with an electronic
load. Different V
IN
levels were captured to compare the performance of the SMPS over increasing input
voltages.
Figure 8. Efficiency Versus Output Current While in Battery Voltage Regulation (4.2V)”
12 bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger SLUUA08A – March 2013 – Revised April 2013
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