Datasheet

MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
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ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= 18V, internal reference, 1µF capacitor at REF, 1µF capacitor at VL, T
A
= 0°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C, unless otherwise noted.)
Note 1: When DCIN is less than 4V, VL is less than 3.2V, causing the battery current to be typically 2µA (CS plus BATT input
current).
Bits11Guaranteed monotonicVDAC Voltage-Setting DAC Resolution
Bits5Guaranteed monotonicCDAC Current-Setting DAC Resolution
mA5
mA579
% of
V
REF
3 4.5 6THM falling
THM THERMISTOR_UR
Underrange Trip Point
% of
V
REF
22 23.5 25THM falling
THM THERMISTOR_HOT
Trip Point
% of
V
REF
74 75.5 77THM falling
THM THERMISTOR_COLD
Trip Point
mA/V0.2GMI Amplifier Transconductance
mA/V1.4GMV Amplifier Transconductance
% of
V
REF
89 91 93THM falling
THM THERMISTOR_OR
Overrange Trip Point
% of
V
DCIN
93 95 97BATT risingBATT POWER_FAIL Threshold
µA±80
GMV Amplifier Maximum
Output Current
µA±200
GMI Amplifier Maximum
Output Current
mV25 80 2001.1V < V
CCI
< 3.5V
CCV Clamp Voltage with
Respect to CCI
UNITSMIN TYP MAXCONDITIONSPARAMETER
mA6V
SDA
= 0.6VSDA Output Low Sink Current
µA-1 1SDA, SCL Input Bias Current
V2.2SDA, SCL Input Voltage High
V0.8SDA, SCL Input Voltage Low
mV25 80 2001.1V < V
CCV
< 3.5V
CCI Clamp Voltage with
Respect to CCV
ChargingCurrent() = 0x0000 10 µA
ChargingCurrent() = 0x0001
to 0x007F (127mA)
V
IOUT
= 17V, ChargingCurrent() = 0x0001
to 0x007F (127mA)
V
DCIN
= 0, V
IOUT
= 20V µA10IOUT Leakage Current
V
IOUT
= 0
IOUT Output Current
% of
V
DCIN
0.5
THM THERMISTOR_OR, _COLD,
_HOT, _UR Trip Point Hysteresis
% of
V
DCIN
1
BATT POWER_FAIL Threshold
Hysteresis
ERROR AMPLIFIERS
TRIP POINTS AND LINEAR CURRENT SOURCES
CURRENT- AND VOLTAGE-SETTING DACs
LOGIC LEVELS