Trickle Charge Current - Analog Devices ADP5062 User Manual

UG-500
Figure 6. Board Setup for VINx Quiescent Current Measurement
VINx Current Limit
The VINx current limit of the
charging mode. Note that the maximum programming for the
charge current into the battery (ISO_Bx) is 1300 mA. For
measuring the input current limit across the full programming
range from 100 mA to 2100 mA, additional system load has to
be connected to the ISO_Sx pins.
ADP5062 can be evaluated in
To measure the VINx current limit, do the following:
1. Set the V
VIN
2. Set the V
ISO_B
3. Enable charging by setting Register 0x07, bit D0
(EN_CHG), high
4. Confirm the ADP5062 charging mode:

The Battery Status indicator on the GUI must show
BAT_SNS > Vweak (see Figure 2).

The ADP5062
current into the battery.
5. Measure the current on VINx supply.
6. Use the GUI to change the input current limit programming
and repeat the measurement.
A 1300 mA charge current into the battery may not be large
enough to drive the input current up to the limit when the
current limit programming values of 1200 mA or higher are used.
Connect an additional load on the ISO_Sx node to evaluate the
higher end of the input current limit programming range.

TRICKLE CHARGE CURRENT

Trickle charge can only be activated during a battery charging
startup sequence, if the voltage level at the ISO_Bx pins is lower
than the V
TRK_DEAD
V, initiate a charge startup sequence by setting an I
Register 0x07, Bit D0 (EN_CHG), high. To measure the trickle
charge current level, do the following:
1. Set the V
ISO_B
2. Set the V
IN
3. Check that the GUI Charger Status indicator shows
Trickle Charge.
4. Check that the GUI Battery Status indicator shows
BAT_SNS < Vtrk.
5. Check the battery short detection by doing the following:

Wait for a 30 second timeout to expire

Check that the GUI shows that the I
(Register 0x0D, Bit D3) BAT_SHR flag is set.

Use the GUI to change the battery short timeout
setting from 1 second to 180 second.
6. Measure the trickle charge current level to the battery. The
default value for I
the trickle charge current setting from 5 mA to 80 mA
using the GUI.
7. Adjust the V
shows Vtrk < BAT_SNS < Vweak.
8. The Charger Status indicator on the GUI should show Fast
Charge (CC-Mode). The charge current is now programmed
I + I
CHG TRK_DEAD
Rev. 0 | Page 8 of 15
Evaluation Board User Guide
supply voltage to 5.0 V.
voltage to 3.6 V on SMU B
must start charging 80 mA to 90 mA
threshold (typically 2.5 V). When V
voltage (SMU or battery simulator) to 2 V.
supply voltage to 5.0 V.
is 20 mA. It is possible to change
TRK_DEAD
voltage up until the Battery Status indicator
ISO_B
, if it is not limited by the input current limit.
is 5.0
VIN
2
C write of
2
C fault register