MAX1667 Datasheet, PDF (4/28 Pages) Maxim Integrated Products – Chemistry-Independent, Level 2 Smart Battery Charger

Chemistry-Independent,
Level 2 Smart Battery Charger
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.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SUPPLY AND REFERENCE
DCIN Quiescent Current
VL Output Voltage
REF Output Voltage
SWITCHING REGULATOR
7.5V < V_DCIN < 28V, logic inputs = VL
7.5V < V_DCIN < 28V, no load
0 < I_SOURCE < 500µA
4
6
mA
5.15
5.4
5.65
V
4.055
4.137
V
Oscillator Frequency
Not in dropout
200
250
310
kHz
DHI Maximum Duty Cycle
In dropout
96.5
%
DHI On-Resistance
DLO On-Resistance
High or low
High or low
4
7
Ω
5
8
Ω
BATT Input Current (Note 1)
CS Input Current (Note 1)
CS to BATT Full-Scale
Current-Sense Voltage
VL < 3.2V, V_BATT = 12V
VL < 3.2V, V_CS = 12V
V_SEL = VL,
ChargingCurrent() = 0x0F80 (128mA)
5
µA
5
µA
145
160
175
mV
Voltage Accuracy
ChargingVoltage() = 0x3130 (12,592mV),
ChargingVoltage() = 0x41A0 (16,800mV)
-1.0
ChargingVoltage() = 0x1060 (4192mV),
ChargingVoltage() = 0x20D0 (8400mV)
-3.0
1.0
%
3.0
TRIP POINTS AND LINEAR CURRENT SOURCES
THM THERMISTOR_OR
Overrange Trip Point
THM THERMISTOR_COLD
Trip Point
THM THERMISTOR_HOT
Trip Point
THM THERMISTOR_UR
Underrange Trip Point
THM falling
THM falling
THM falling
THM falling
88.5
73.5
21.5
2.5
93.5
77.5
25.5
6.5
% of
V_REF
% of
V_REF
% of
V_REF
% of
V_REF
THM THERMISTOR_OR, _COLD,
_HOT, _UR Trip Point Hysteresis
1
%
LOGIC LEVELS
SDA, SCL Input Voltage Low
0.5
V
SDA, SCL Input Voltage High
2.2
V
SDA, SCL Input Bias Current
-1
1
µA
SDA Output Low Sink Current
V_SDA = 0.6V
6
mA
4 _______________________________________________________________________________________