Low-Cost, Multichemistry Battery-
Charger Building Block
MAX1772
ELECTRICAL CHARACTERISTICS (continued)
(V
DCIN
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
REFIN
= 3.0V, V
VCTL
= V
ICTL
= 0.75
V
REFIN
, V
CELLS
= 2.0V,
V
ACIN
= 0V, CLS = REF, V
BST
- V
LX
= 4.5V, V
GND
= V
PGND
= 0V, C
LDO
= 1µF, LDO = DLOV, C
REF
= 1µF; pins CCI, CCS, and CCV
are compensated per Figure 1a;
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
V
VCTL
= V
REFIN
(2, 3, or 4 cells)
(see Equation 1)
V
VCTL
= V
REFIN
/20 (2, 3, or 4 cells)
(see Equation 1)
MIN
-0.5
-0.5
2.0
1.20
V
ICHG
to (V
CSIP
- V
CSIN
); V
CSIP
-
V
CSIN
= 0.185V; V
ICHG
= 0V, 3.0V
V
CSIP
- V
CSIN
= 0.185V
V
CSIP
- V
CSIN
= 0.05V
V
IINP
to (V
CSSP
- V
CSSN
); V
CSSP
-
V
CSSN
= 0.185V; V
IINP
= 0V, 3.0V (Note 3)
V
CSSP
- V
CSSN
= 0.185V
V
CSSP
- V
CSSN
= 0.05V
(Note 3)
0.95
-5
-10
0.85
-15
-20
-10
-10
8.0
1.00
1.00
TYP
MAX
+0.5
%
+0.5
3.6
1.92
1.05
+5
+10
1.15
+15
+20
+10
+10
28
V
V
µS
%
µS
%
%
V
UNITS
Battery-Regulation Voltage
Accuracy
REFIN Range
REFIN Undervoltage Lockout
ICHG Transconductance
ICHG Accuracy
IINP Transconductance
IINP Current Accuracy
CSSP - CSSN Accuracy
CSSP + CSSN Input Voltage
Range
LOGIC LEVELS
CELLS Input Low Voltage
CELLS Input Middle Voltage
CELLS Input High Voltage
CELLS Input Bias Current
ACOK Sink Current
ACOK Leakage Current
V
CELLS
= 0V or V
LDO
V
ACOK
= 0.4V
V
ACOK
= 5.5V
V
CSSP
- V
CSSN
= 0.08V, V
CLS
= 1.6V
V
CSSP
- V
CSSN
= 0.2V, CLS = REF
0.2
0.4
V
LDO
- 0.25
-10
1
-1
+1
V
LDO
- 0.5
V
LDO
+10
V
V
V
µA
mA
µA
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
