Ag103 Evaluation Board User Manual
4.5.1 Mode 0 – Bulk Charge Operation
Once the Ag103 has checked the battery capacity and sees a 12V battery connected it
will power up and the ‘STAT’ pin will output a steady state 'logic 1'.
The Ag103 will continue to output this state until the battery has reached it's 80%
charge before switching to float charge and enters Mode 1.
4.5.2 Mode 1– Float Charge
After the battery has reached it's 80% charge the Ag103 will change it's charging status
to float charge by dropping it's terminal voltage down to ~13.65V. The 'STAT' pin will
drop to a logic 0 for 1s and then back to a logic 1 for 1s. This cycle will repeat itself over
the period of its float charge.
4.5.3 Mode 2 – Over Current
If an output over current condition is detected, the Ag103 will shutdown its DC-DC
converter and will go into Mode 2. The STAT pin will drop to a logic 0 for 100ms,
followed by a logic 1 for 100ms before returning to a logic 0. The Ag103 will then reset
and wait 2 seconds before re-attempting to power up. If the over current is still there
when trying to power up, the Ag103 will immediately shut back down and repeat the
process. Once the over current has been removed the Ag103 will return to Mode 0 (bulk
charge operation).
4.5.4 Mode 3 – Over Temperature
If a battery over temperature condition occurs, the Ag103 will shutdown its DC-DC
converter to protect the battery and enter Mode 3. The STAT pin will drop to a logic 0 for
100ms before generating two logic 1 pulses, with a 100ms mark and 100ms space. This
will repeat over a 2s period until the battery temperature has dropped below 50˚C (the
maximum operating temperature). Once the battery temperature has dropped below
50˚C the Ag103 will return to Mode 0 (bulk charge operation).
4.5.5 Mode 4 – Disconnected battery
If the battery is disconnected or there is no battery present at power up, the Ag103 will
shutdown its DC-DC converter, go into Mode 4 and output three 100ms logic 1 pulses,
with a 100ms mark and 100ms space. This will repeat over a 2s period until a 12V
battery is connected. When a 12V battery is connected the Ag103 will go into Mode 0
(bulk charge operation).
