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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 = 0°C to +85°C ,
unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
ISET Input Bias Current
ISET PWM Threshold
CONDITIONS
V ISET = 3V
CSSN = BATT, V ISET = 5V
Rising
Falling
MIN
-0.2
-0.2
0.8
TYP
MAX
+0.2
+0.2
2.4
UNITS
μA
V
ISET Frequency
ISET Effective Resolution
f PWM = 3.2MHz
0.128
8
500
kHz
Bits
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
58.5
-2.5
-0.1
8.0
2.66
-2.5
-2.5
60
2.8
61.5
+2.5
+0.1
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 Undervoltage-Lockout (UVLO) Trip-Point
DCIN + CSSP + CSSN Quiescent Current
DCIN falling
DCIN rising
Adapter present (Note 2)
Adapter absent (Note 2)
7.9
8.1
8.7
3
30
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)
10
10
20
20
μA
V BATT = 2V to 19V, adapter present (Note 2)
200
500
LDO Output Voltage
8.0V < V DCIN < 26V, no load
5.15
5.35
5.55
V
LDO Load Regulation
LDO UVLO Threshold
0 < I LDO < 40mA
3.2
100
4.1
200
5.0
mV
V
REFERENCES
V AA Output Voltage
V AA UVLO Threshold
I VAA = 50 μA
V AA falling
4.18
4.20
3.1
4.22
3.9
V
V
ACIN
ACIN Threshold
ACIN Threshold Hysteresis
ACIN Input Bias Current
2.058
10
-1
2.1
20
2.142
30
+1
V
mV
μA
ACOK
ACOK Sink Current
ACOK Leakage Current
V ACOK = 0.4V, V ACIN = 1.5V
V ACOK = 5.5V, V ACIN = 2.5V
6
1
mA
μA
_______________________________________________________________________________________
3
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