MAX1667
Chemistry-Independent,
Level 2 Smart Battery Charger
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(V
DCIN
= 18V, internal reference, 1µF capacitor at REF, 1µF capacitor at VL, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
are at T
A
= +25°C. Limits over this temperature range are guaranteed by design.)
µACS Input Current (Note 1) 5VL < 3.2V, V
CS
= 12V
mV145 160 175
V
SEL
= VL,
ChargingCurrent() = 0x0F80 (128mA)
CS to BATT Full-Scale
Current-Sense Voltage
%
-1.0 1.0
ChargingVoltage() = 0x3130 (12,592mV),
ChargingVoltage() = 0x41A0 (16,800mV)
Voltage Accuracy
µABATT Input Current (Note 1) 5VL < 3.2V, V
BATT
= 12V
Ω58High or lowDLO On-Resistance
Ω47High or lowDHI On-Resistance
mA467.5V < V
DCIN
< 28V, logic inputs = VLDCIN Quiescent Current
%96.5In dropoutDHI Maximum Duty Cycle
kHz200 250 310Not in dropoutOscillator Frequency
V5.15 5.4 5.657.5V < V
DCIN
< 28V, no loadVL Output Voltage
V4.055 4.1370 < I
SOURCE
< 500µAREF Output Voltage
UNITSMIN TYP MAXCONDITIONSPARAMETER
% of
V
REF
88.5 93.5THM falling
THM THERMISTOR_OR
Overrange Trip Point
% of
V
REF
73.5 77.5THM falling
THM THERMISTOR_COLD
Trip Point
V0.5SDA, SCL Input Voltage Low
V2.2SDA, SCL Input Voltage High
µA-1 1SDA, SCL Input Bias Current
% of
V
REF
21.5 25.5THM falling
THM THERMISTOR_HOT
Trip Point
% of
V
REF
2.5 6.5THM falling
THM THERMISTOR_UR
Underrange Trip Point
mA6V
SDA
= 0.6VSDA Output Low Sink Current
%1
THM THERMISTOR_OR, _COLD,
_HOT, _UR Trip Point Hysteresis
-3.0 3.0
ChargingVoltage() = 0x1060 (4192mV),
ChargingVoltage() = 0x20D0 (8400mV)
SUPPLY AND REFERENCE
SWITCHING REGULATOR
TRIP POINTS AND LINEAR CURRENT SOURCES
LOGIC LEVELS
