MAX1645 Datasheet, PDF (8/32 Pages) Maxim Integrated Products – Advanced Chemistry-Independent, Level 2 Battery Chargers with Input Current Limiting

Advanced Chemistry-Independent, Level 2
Battery Chargers 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
SYMBOL
t_DV
CONDITIONS
MIN
MAX UNITS
1
µs
Maximum Charge Period
Without a ChargingVoltage() or
Charging Current() loaded
t_WDT
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: Does not include current-sense resistor tolerance.
Note 4: 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.)
LOAD-TRANSIENT RESPONSE
(BATTERY REMOVAL AND REINSERTION)
16V ^{MAX1645 toc01}
14V
12V
1A
0
1.5V
CCV
CCI
CCV
1V
CCI
CCV
CCI
0.5V
BATTERY REMOVED ^2ms/div BATTERY INSERTED
ChargingVoltage() = 15000mV
ChargingCurrent() = 1000mA
LOAD-TRANSIENT RESPONSE
(STEP IN LOAD CURRENT)
4A ^{MAX1645 toc02}
2A
0
CCS
CCI
CCI
CCS
2A
CCI
1V
CCS
0
1ms/div
ChargingCurrent() = 3008mA
V_BATT = 16V
LOAD STEP: 0A TO 2A
I_SOURCE LIMIT = 2.5A
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)
LDO LINE REGULATION
5.60 _{ILOAD = 0}
5.55
5.50
5.45
5.40
5.35
5.30
5.25
5.20
5
10
15
20
25
30
V_DCIN (V)
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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