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UG-595
FAST CHARGE CURRENT
To measure the fast change current, complete the following steps:
1.
Set the V
supply voltage to 5.0 V.
VIN
2.
Set V
to 3.3 V.
ISO_B
3.
Verify that the GUI Battery Status indicator shows
BAT_SNS > Vweak.
4.
Set the VINx input current limit to the maximum value
2100 mA.
5.
Measure the charge current into the battery. The default
value for the fast charge current is 750 mA. It is possible to
change the fast charge current setting from 50 mA to 1300 mA
using the GUI.
6.
The fast charge current may be reduced because of the
following conditions:
•
The V
level is close to the termination voltage
BAT_SNS
V
(default 3.60 V).
TRM
•
The die temperature, T
charging temperature, T
TERMINATION VOLTAGE AND END OF CHARGE
(EOC) CURRENT
Measuring Termination Voltage Using SMU or Battery
Simulator
The
ADP5063
fast charge constant voltage (CV) regulation is
optimized for batteries with series resistance in the 100 mΩ
to 250 mΩ range. When using a SMU or a battery simulator
connected to the ISO_Bx, set the series resistance (R
within this range.
Some battery simulators, such as the Keithley 2306, have
programmable source resistance integrated in the instrument
itself. For SMU units, use an external resistor to obtain accurate
measurement results of the termination voltage.
To measure the termination voltage, complete the following steps:
1.
Set the V
supply voltage to 5.0 V.
VIN
2.
Set the termination voltage to 3.60 V using the GUI.
3.
Disable the EOC by setting the EN_EOC bit (D2) to low in
the functional settings register, Register 0x07.
4.
Disable charge complete timer register, Register 0x06, using
the GUI (see Figure 3).
5.
Sweep V
up until the Charger Status indicator in the
ISO_B
GUI shows Fast Charge (CV-Mode).
6.
Sweep V
up until the charge current has dropped to
ISO_B
50 mA. In fast charge CV mode, 1 mV step up of V
can reduce the charge current by several mA.
7.
Measure termination voltage between the BAT_SNS (TP20)
and GND_S (TP9) nodes.
, exceeds the isothermal
J
, (typically 115°C).
LIM
in Figure 5)
S
ISO_B
Measuring EOC Current
To measure the EOC current, complete the following steps:
8.
Use the GUI to set the termination current to 52.5 mA.
9.
Step V
ISO_B
10. Enable the EOC by setting the EN_EOC bit (D2) to high
in the functional settings register, Register 0x07.
11. Step V
ISO_B
step until the Charger Status indicator in the GUI shows
Charge Complete. The last charge current value before
Charge Complete is the charge complete current threshold.
Charging stops and there is no current flowing into the
ISO_B_x node.
Measuring Recharge Voltage
To measure the recharge voltage, complete the following steps:
12. Step V
ISO_B
Charger Status indicator on the GUI shows Fast Charge
(CC-Mode) and charge current flows to the ISO_B_x
node. The last value before the charger status change is the
recharge voltage level. With default settings, the recharge
voltage threshold is 3.34 V (V
13. Use the GUI to change the termination current and
recharge voltage programming. Repeat Step 9 to Step 12
to evaluate different settings.
Rev. 0 | Page 8 of 12
Evaluation Board User Guide
down 100 mV.
up and monitor the charge current for each
down and monitor the voltage until the
).
ISO_B
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