MAX1645B Datasheet, PDF (3/32 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 = 0°C to +85°C, unless otherwise noted. Typical values are at
T_A = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
PDL Load Switch Threshold
Hysteresis
PDL Turn-Off Current
PDL Turn-On Resistance
CVS Input Bias Current
BATT Full-Charge Voltage
V_PDL-HYS V_CVS referred to V_BATT
V_CSSN - V_PDL = 1V
PDL to GND
V_CVS = 28V
ChargingVoltage() = 0x41A0
ChargingVoltage() = 0x3130
V0
ChargingVoltage() = 0x20D0
ChargingVoltage() = 0x1060
100
200
300
mV
6
12
mA
50
100
150
kΩ
6
20
µA
16.666 16.8 16.934
12.492 12.592 12.692
V
8.333 8.4 8.467
4.150 4.192 4.234
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
V_CSIP - V_CSIN
V_CSIP - V_CSIN
ChargingCurrent() =
0x0BC0
139.9
150.4
160.9
mV
ChargingCurrent() = _3.08
6.4
9.72
0x0080
V_CLS = 4.096V
V_CLS = 2.048V
188.6 204.8 221.0
mV
91.3 102.4 113.5
V_BATT = 1V
3.08
6.4
9.72
mV
250
300
350
mV
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 = 0 to 28V
V_CSSP = C_CSSN = V_DCIN = 0 to 28V
V_CSSP = V_CSSN = 28V, V_DCIN = 0
From BATT to CCV
-5
-100
-100
-1
200
+5
µA
540 +1000 µA
35
+100
µA
+1
µA
500
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 +0.05 +1
µA
0.111 0.222 0.444 µA/mV
Battery Current-Error Amp
Transconductance
From CSIP/CSIN to CCI, ChargingCurrent()
0.5
1
2.0 µA/mV
= 0x0BC0, V_CSIP - V_CSIN = 150.4mV
Input Current-Error Amp
Transconductance
CCV/CCI/CCS Clamp Voltage
From CSSP/CSSN to CCS, V_CLS = 2.048V,
V_CSSP - V_CSSN = 102.4mV
0.5
1
2.0 µA/mV
V_CCV = V_CCI = V_CCS = 0.25V to 2V (Note 3) 150
300
600
mV
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