MAX1645 Datasheet, PDF (6/32 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
SYMBOL
PDL Turn-On Resistance
CVS Input Bias Current
ERROR AMPLIFIER SPECIFICATIONS
BATT Full-Charge Voltage
V0
PDL to GND
V_CVS = 28V
CONDITIONS
ChargingVoltage() = 0x41A0
ChargingVoltage() = 0x3130
ChargingVoltage() = 0x20D0
ChargingVoltage() = 0x1060
MIN
50
16.532
12.391
8.266
4.124
MAX
150
20
UNITS
kΩ
µA
17.068
12.793
V
8.534
4.260
BATT Charge Current (Note 3)
I0
R_CSI = 50mΩ
ChargingCurrent() =
0x0BC0
ChargingCurrent() =
0x0080
2.608
15.2
3.408
A
240.8 mA
DCIN Source Current Limit
(Note 3)
BATT Undervoltage Charge
Current
R_CSS = 40mΩ
V_CLS = 4.096V
V_CLS = 2.048V
V_BATT = 1V, R_CSI = 50mΩ
4.358
2.054
20
5.882
A
3.006
200
mA
BATT/CSIP/CSIN Input Voltage
Range
0
20
V
Total BATT Input Bias Current
Total of I_BATT, I_CSIP, and I_CSIN;
V_BATT = 0 to 20V
-700
700
µA
Total BATT Quiescent Current
Total of I_BATT, I_CSIP, and I_CSIN;
V_BATT = 0 to 20V, charge inhibited
-100
100
µA
Total BATT Standby Current
CSSP/Input Bias Current
CSSN Input Bias Current
CSSP/CSSN Quiescent Current
Battery Voltage-Error Amp DC
Gain
Total of I_BATT, I_CSIP, and I_CSIN;
V_BATT = 0 to 20V, V_DCIN = 0
V_CSSP = V_CSSN = V_DCIN = 28V
V_CSSP = V_CSSN = V_DCIN = 28V
V_CSSP = V_CSSN = 28V, V_DCIN = 0
From BATT to CCV
-5
-100
-100
-1
200
5
µA
1000 µA
100
µA
1
µA
V/V
CLS Input Bias Current
Battery Voltage-Error Amp
Transconductance
V_CLS = V_REF/2 to V_REF
From BATT to CCV, ChargingVoltage() =
0x41A0, V_BATT = 16.8V
-1
0.111
1
µA
0.444 µA/mV
Battery Current-Error Amp
Transconductance
From CSIP/CSIN to CCI, ChargingCurrent() =
0x0BC0, V_CSIP -V_CSIN = 150.4mV
0.5
2 µA/mV
Input Current-Error Amp
Transconductance
From CSSP/CSSN to CCS, V_CLS = 2.048V,
V_CSSP - V_CSSN = 102.4mV
0.5
2 µA/mV
CCV/CCI/CCS Clamp Voltage
(Note 4)
V_CCV = V_CCI = V_CCS = 0.25V to 2V
150
600
mV
DC-TO-DC CONVERTER SPECIFICATIONS
Minimum Off-Time
t_OFF
Maximum On-Time
t_ON
Maximum Duty Cycle
1
1.5
µs
5
15
ms
99
%
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