MAX1645B Datasheet, PDF (8/32 Pages) Maxim Integrated Products – Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting

Advanced Chemistry-Independent, Level 2
Battery Charger with Input Current Limiting
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V_DD = +3.3V, V_BATT = +16.8V, V_DCIN = +18V, T_A = -40°C to +85°C, unless otherwise noted. Guaranteed by design.)
PARAMETER
SDA Output Data Valid from SCL
Maximum Charge Period Without
a ChargingVoltage() or
Charging Current() Loaded
SYMBOL
t_DV
t_WDT
CONDITIONS
MIN TYP MAX UNITS
1
µs
140
210
s
Note 1: Guaranteed by meeting the SMB timing specs.
Note 2: The charger reverts to a trickle-charge mode of I_CHARGE = 128mA below this threshold.
Note 3: Voltage difference between CCV and CCI or CCS when one of these three pins is held low and the others try to pull high.
Typical Operating Characteristics
(Circuit of Figure 1, V_DCIN = 20V, T_A = +25°C, unless otherwise noted.)
BATTERY REMOVAL AND REINSERTION
TRANSIENT RESPONSE
MAX1645B toc01
16V
15V
1A
CCV
CCV 0
CCI
1.25V
CCI
CCI
CCV
BATTERY REMOVED BATTERY INSERTED
0.75V
0.25V
2ms/div
ChargingVoltage() = 16000mV
ChargingCurrent() = 1000mA
LOAD-TRANSIENT RESPONSE
(STEP-IN LOAD CURRENT)
MAX1645B toc02
15.5V
LDO LINE REGULATION
5.60 _{ILOAD = 0}
5.55
15.0V
5.50
CCS
CCS
2.75V
5.45
CCI
CCI
2.25V
5.40
CCI
1.75V
5.35
5.30
CCS
0.75V
5.25
400µs/div
ChargingCurrent() = 3.0A
0 TO 2A LOAD STEP, V_BATT = 20V
I_SOURCE LIMIT = 2.5A
5.20
5
10
15
20
25
30
V_DCIN (V)
LDO LOAD REGULATION
5.60
5.55
5.50
5.45
5.40
5.35
5.30
5.25
5.20
0 2 4 6 8 10 12 14 16 18 20
LOAD CURRENT (mA)
REFERENCE VOLTAGE LOAD REGULATION
4.100
4.098
4.096
4.094
4.092
4.090
0
50 100 150 200 250 300
LOAD CURRENT (µA)
REFERENCE VOLTAGE
vs. TEMPERATURE
4.110
4.105
4.100
4.095
4.090
4.085
4.080
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
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