PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
•
Notes concerning the operation of the CHG2, CHG1 and
CHG0 bits or ISET code:
If the part has NOT been turned on by EN_KEY and
CHGIN is disconnected then reconnected, it will be
reset to 100% (since the whole part was shutdown).
•
Once the part is turned on using the EN_KEY pin (and
there is a BAT and/or CHGIN supply), and data is sent
through I2C, the I2C codes in the registers will always
be preserved until the part is shut down using the
EN_HOLD (going low) or if the BAT and CHGIN supply
are removed.
If USE_USB = H:
•
ISET Code 000 in Register 0x00, bits 2,3,4 = 100mA.
The other codes stay the same as if USE_USB=H.
If the part has been turned on by EN_KEY and CHGIN
is disconnected then reconnected, the ISET code will
be forced to 000 and the current will be set to
100mA.
The next time any I2C register is programmed (even if
it is not for the ISET code), the ISET code will revert
back to what it was before. For example, if the ISET
code is set to 010 and USE_USB=H and the part was
turned on with EN_KEY, then when CHGIN is discon-
nected then reconnected, the charger will be set to
100mA. Then if any other command is sent, the ISET
code will remain 010.
•
•
If the part is turned on by connecting supply CHGIN
(and not through EN_KEY), then when the CHGIN is
removed, the part will shut down and all I2C registers
will be cleared.
•
If USE_USB = L:
•
The charge current is set by the ISET code in Register
0x00, bits 2,3,4. (code 000 will equal 100%)
If the part has been turned on by EN_KEY and CHGIN
is disconnected then reconnected, it will still contain
the code it had before (if it was 60% then it will
remain 60%).
•
Term1
Term0
Termination Current (as % of Constant Current Charge)
0
0
1
1
0
1
0
1
5% (default)
10%
15%
20%
Table 4: Term Bit Setting for the Termination Current Level.
RCHG1
RCHG0
Recharge Threshold
0
0
1
1
0
1
0
1
4.00V (default)
4.05V
4.10V
4.15V
Table 5: RCHG Bit Setting for the Battery Charger Recharge Voltage Level.
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2601.2008.01.1.0
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