Low-Cost, Multichemistry Battery-
Charger Building Block
ELECTRICAL CHARACTERISTICS
(V
DCIN
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
REFIN
= 3.0V, V
VCTL
= V
ICTL
= 0.75
✕
REFIN, CELLS = 2.0V,
ACIN = 0, CLS = REF, V
BST
- V
LX
= 4.5V, GND = PGND = 0, C
LDO
= 1µF, LDO = DLOV, C
REF
= 1µF; pins CCI, CCS, and CCV are
compensated per Figure 1a;
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 1)
PARAMETER
SUPPLY AND LDO REGULATOR
DCIN Input Voltage Range
DCIN Undervoltage Lockout
Trip Point
DCIN Quiescent Current
LDO Output Voltage
TRIP POINTS
BATT POWER_FAIL Threshold
BATT POWER_FAIL Threshold
Hysteresis
ACIN Threshold
ACIN Threshold Hysteresis
ACIN Input Bias Current
CLS Input Range
CLS Input Bias Current
SWITCHING REGULATOR
Minimum Off-Time
Maximum On-Time
Oscillator Frequency
DHI Maximum Duty Cycle
BATT Input Current
CSIP/CSIN Input Current
CSSP/CSSN Input Current
BATT/CSIP/CSIN Input Voltage
Range
CSIP to CSIN Full-Scale
Current-Sense Voltage
CSSP to CSSN Full-Scale
Current-Sense Voltage
CURRENT AND VOLTAGE SETTING
Charging Current Accuracy
ICTL, VCTL, REFIN Input Bias
Current
ICTL = REFIN (see Equation 2)
ICTL = REFIN/32 (see Equation 2)
V
VCTL
= V
ICTL
= V
REFIN
= 3V
V
DCIN
= 0, V
VCTL
= V
ICTL
= V
REFIN
= 5V
-8
-55
-1
-1
+8
+55
+1
+1
%
µA
V
BATT
= 12V
I
BATT
V
BATT
= 19V, V
DCIN
= 0
V
BATT
= 2V to 19V, V
DCIN
> V
BATT
+ 0.3V
V
DCIN
= 0
V
CSIP
= V
CSIN
= 12V
V
DCIN
= 0
V
CSSP
= V
CSSN
= V
DCIN
> 8.0V
0
189
189
f
OSC
(Note 1)
99
5
500
5
800
0.3
800
19
219
219
V
BATT
= 16.8V
1
5
1.5
15
400
µs
ms
kHz
%
µA
µA
µA
V
mV
mV
V
CLS
= 2.0V
ACIN rising
0.5% of REF
V
ACIN
= 2.048V
V
CSSP
falling
50
100
2.007
10
-1
1.6
-1
150
300
2.089
30
+1
REF
+1
mV
mV
V
mV
µA
V
µA
I
DCIN
V
DCIN
DCIN falling
DCIN rising
8.0V < V
DCIN
< 28V
8.0V < V
DCIN
< 28V, no load
5.25
8.0
7
7.85
6
5.65
28.0
V
V
mA
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1772
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
