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MAX1645B Datasheet, PDF (7/32 Pages) Maxim Integrated Products – Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting
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Advanced Chemistry-Independent, Level 2
Battery Charger with Input Current Limiting
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VDD = +3.3V, VBATT = +16.8V, VDCIN = +18V, TA = -40°C to +85°C, unless otherwise noted. Guaranteed by design.)
PARAMETER
SYMBOL
CONDITIONS
DC-TO-DC CONVERTER SPECIFICATIONS
Minimum Off-Time
tOFF
Maximum On-Time
tON
Maximum Duty Cycle
LX Input Bias Current
VDCIN = 28V, VBATT = VLX = 20V
LX Input Quiescent Current
BST Supply Current
VDCIN = 0, VBATT = VLX = 20V
DHI high
DLOV Supply Current
DHI Output Resistance
VDLOV = VLDO, DLO low
DHI high or low, VBST - VLX = 4.5V
DLO Output Resistance
DLO high or low, VDLOV = 4.5V
THERMISTOR COMPARATOR SPECIFICATIONS
MIN TYP MAX UNITS
1.0
1.5
µs
5
15
ms
99
%
500
µA
1
µA
15
µA
10
µA
14
Ω
14
Ω
THM Input Bias Current
Thermistor Overrange Threshold
Thermistor Cold Threshold
Thermistor Hot Threshold
Thermistor Underrange
Threshold
VTHM = 4% of VDD to 96% of VDD,
VDD = 2.8V to 5.65V
VDD = 2.8V to 5.65V, VTHM falling
VDD = 2.8V to 5.65V, VTHM falling
VDD = 2.8V to 5.65V, VTHM falling
VDD = 2.8V to 5.65V, VTHM falling
-1
89.5
74
22
6
+1
µA
92.5
77
25
% of VDD
% of VDD
% of VDD
9 % of VDD
SMB INTERFACE LEVEL SPECIFICATIONS (VDD = 2.8V to 5.65V)
SDA/SCL Input Low Voltage
SDA/SCL Input High Voltage
1.4
SDA/SCL Input Bias Current
-1
SDA Output Low Sink Current
VSDA = 0.4V
6
INT Output High Leakage
VINT = 5.65V
INT Output Low Voltage
IINT = 1mA
SMB INTERFACE TIMING SPECIFICATIONS (VDD = 2.8V to 5.65V, Figures 4 and 5)
SCL High Period
tHIGH
4
SCL Low Period
tLOW
4.7
Start Condition Setup Time
from SCL
tSU:STA
4.7
0.6
V
V
+1
µA
mA
1
µA
200
mV
µs
µs
µs
Start Condition Hold Time
from SCL
SDA Setup Time from SCL
SDA Hold Time from SCL
tHD:STA
tSU:DAT
tHD:DAT
4
µs
250
ns
0
ns
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