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1.2MHz Low-Cost,
High-Performance Chargers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V DCIN = V CSSP = V CSSN = 19V, V BATT = V CSIP = V CSIN = 16.8V, V VCTL = V AA , V ISET = 1V, T A = -40°C to +85°C ,
unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CHARGE-CURRENT REGULATION
ISET Range
V ISET = V AA /4 or
0.0
57.5
V AA /2
62.5
V
mV
Full Charge-Current Accuracy
ISET = 99.9% duty cycle
-4.2
+4.2
%
(CSIP to CSIN)
V BATT = 1V to 16.8V
V ISET = V AA /6 or
ISET = 66.7% duty cycle
38
-5
42
+5
mV
%
Trickle Charge-Current Accuracy
Charge-Current Gain Error
Charge-Current Offset Error
BATT/CSIP/CSIN Input Voltage Range
ISET Power-Down Mode Threshold
ISET PWM Threshold
ISET Frequency
V ISET = V AA /80 or
ISET = 5% duty cycle
Based on V ISET = V VAA /4 and V ISET = V VAA /80
Based on V ISET = V VAA /4 and V ISET = V VAA /80
ISET falling
ISET rising
Rising
Falling
1.4
-52
-2
-1.4
0
21
33
0.8
0.128
4.6
+52
+2
+1.4
24
31
47
2.4
500
mV
%
%
mV
V
mV
V
kHz
INPUT-CURRENT REGULATION
Input Current-Limit Threshold
CSSN Input Bias Current
CSSP/CSSN Input-Voltage Range
IINP Transconductance
IINP Accuracy
V CSSP - V CSSN
Adapter present
V CSSP - V CSSN = 60mV
V CSSP - V CSSN = 60mV, V IINP = 0V to 4.5V
V CSSP - V CSSN = 35mV
58.2
-3
-2
8.0
2.66
-2.5
-2.5
61.8
+3
+2
26.0
2.94
+2.5
+2.5
mV
%
μA
V
μA/mV
%
SUPPLY AND LINEAR REGULATOR
DCIN Input-Voltage Range
8
26
V
DCIN UVLO Trip-Point
DCIN + CSSP + CSSN Quiescent Current
DCIN falling
DCIN rising
Adapter present (Note 2)
Adapter absent (Note 2)
7.9
8.9
6
50
V
mA
μA
BATT + CSIP + CSIN + LX Input Current
V BATT = 16.8V
Adapter absent (Note 2)
Charger shutdown (Note 2)
20
20
μA
V BATT = 2V to 19V, adapter present (Note 2)
500
LDO Output Voltage
8.0V < V DCIN < 26V, no load
5.15
5.55
V
LDO Load Regulation
LDO UVLO Threshold
0 < I LDO < 40mA
3.2
200
5.0
mV
V
_______________________________________________________________________________________
5
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