UG-500
Evaluation Board User Guide
Rev. 0 | Page 10 of 15
THR INPUT AND JEITA SETTINGS
The THR input of the
ADP5062
evaluation board is equipped
with the 50 kΩ trimmer resistor (R3) and jumper J10. When
using an actual Li-Ion NTC thermistor terminal, configure the
board according to
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.
1.
Remove jumper J10 resistor.
2.
Connect the Li-Ion battery NTC thermistor to the screw
terminal, J2, at Pin 4.
Evaluating THR Input Using Typical Board Setup
To evaluate the THR input using the typical board setup, do the
following:
1.
Set the V
IN
supply voltage to 5.0 V.
2.
Set V
ISO_B
to 3.9 V.
3.
Set the charge current setting to 750 mA using the GUI.
4.
Set V
IN
input current limit to 1500 mA.
5.
Enable charging (EN_CHG = high).
6.
Measure current to ISO_Bx, value should be 750 mA.
7.
Adjust the trimmer resistor until the
THR-pin status
indicator on the GUI shows
BatCool
.
8.
Enable JEITA by setting EN_JEITA bit high in functional
settings register, Register 0x08.
9.
Measure current to ISO_Bx. Charging current must now
be half of the fast charge current setting.
10.
Change the trimmer resistor setting to evaluate the JEITA
thresholds. The THR input resistance thresholds are
specified in the
ADP5062
data sheet.
11.
The
THR-pin status
indicator in the GUI must show
BatCold
,
BatCool
,
Thermistor OK
,
BatWarm
, or
BatHot
when adjusting the trimmer resistance from 50 kΩ to 0 Ω.
