MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
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7) The SEL pin digitally limits the output current to 4A,
3A, or 1A without a change in sense resistor value
between the three modes.
8) The single count current-sense voltage has been
changed to 5mV. R1 required is now 40mΩ.
9) After the AlarmWarning() message, the charger is
not locked off. Subsequent ChargingVoltage() or
ChargingCurrent() commands allow the MAX1667
to resume the charge.
10) The Alert-Response address is 0x13 (0b00010011).
When upgrading a MAX1647 design, follow these rec-
ommended or required changes (part numbers refer to
Figure 3 of the MAX1647 data sheet):
1) Change R1 to 40mΩ (required).
2) Remove diodes D5 and D6, transistor Q1, and resis-
tor R6. Connect IOUT directly to BATT (recommend-
ed).
3) Remove the external +4.096V reference (recom-
mended).
4) Remove D6 (recommended). When doing this, also
place a small-signal diode in series with R7 and con-
nect it directly to the DC source (see D3 and R5 on
Figure 3 of the MAX1647 data sheet).
