MAX1645B Datasheet, PDF (6/32 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
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 TYP MAX UNITS
50
150
kΩ
20
µA
16.532
12.391
8.266
4.124
17.068
12.793
V
8.534
4.260
BATT Charge Current-Sense
Voltage
DCIN Source Current-Limit
Sense Voltage
BATT Undervoltage Charge
Current-Sense Voltage
Inductor Peak Current Limit
BATT/CSIP/CSIN Input Voltage
Range
I0
V_CSIP - V_CSIN
V_CSSP - V_CSSN
ChargingCurrent() =
0x0BC0
ChargingCurrent() =
0x0080
V_CLS = 4.096V
V_CLS = 2.048V
130.4
0.76
174.3
82.2
V_BATT = 1V, V_CSIP - V_CSIN
1
V_CSIP - V_CSIN
250
0
170.4
mV
12.04
235.3
mV
120.2
10
mV
350
mV
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
CLS Input Bias Current
Battery Voltage-Error Amp
Transconductance
Total of I_BATT, I_CSIP, and I_CSIN;
V_BATT = 0 to 20V, V_DCIN = 0
V_CSSP = V_CSSN = V_DCIN = 0 to 28V
V_CSSP = C_CSSN = V_DCIN = 0 to 28V
V_CSSP = V_CSSN = 28V, V_DCIN = 0
From BATT to CCV
V_CLS = V_REF/2 to V_REF
From BATT to CCV, ChargingVoltage() =
0x41A0, V_BATT = 16.8V
-5
-100
-100
-1
200
-1
0.111
+5
µA
+1000 µA
+100 mA
+1
µA
V/V
+1
µA
0.444 µA/mV
Battery Current-Error Amp
Transconductance
Input Current-Error Amp
Transconductance
CCV/CCI/CCS Clamp Voltage
From CSIP/CSIN to CCI, ChargingCurrent()
0.5
= 0x0BC0, V_CSIP - V_CSIN = 150.4mV
From CSSP/CSSN to CCS, V_CLS = 2.048V,
0.5
V_CSSP - V_CSSN = 102.4mV
V_CCV = V_CCI = V_CCS = 0.25V to 2V (Note 3) 150
2.0 µA/mV
2.0 µA/mV
600
mV
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