Low-Cost, Multichemistry Battery-
Charger Building Block
ELECTRICꢃL CHꢃRꢃCTERISTICS (AVntinued)
ꢀ
(V
= V
= V
= 18V, V
= V
= V
= V
= 12V, V
= 3.0V, V
= 1µF, LDO = DLOV, C
= V
= 0.75
REF
V
, V
= 2.0V,
CELLS
DCIN
CSSP
CSSN
BATT
- V = 4.5V, V
CSIP
CSIN
REFIN
VCTL
ICTL
REFIN
V
= 0V, CLS = REF, V
= 0V, C
= 1µF; pins CCI, CCS, and CCV
ACIN
BST
LX
GND
PGND
LDO
are compensated per Figure 1a; T = ±°C tV +8.°C, unless otherwise noted. Typical values are at T = +25°C.)
ꢃ
A
PꢃRꢃMETER
SYMBꢀL
CꢀNDITIꢀNS
MIN
TYP
MꢃX
ꢄNITS
V
= V
(2, 3, or 4 cells)
VCTL
REFIN
-0.5
+0.5
(see Equation 1)
Battery-Regulation Voltage
Accuracy
%
MAX172
V
= V
/20 (2, 3, or 4 cells)
REFIN
VCTL
-0.5
2.0
+0.5
(see Equation 1)
REFIN Range
3.6
V
V
REFIN Undervoltage Lockout
1.20
1.00
1.92
V
V
to (V
= 0.185V; V
- V
CSIN
ICHG
); V
= 0V, 3.0V
-
ICHG
CSIN
CSIP
CSIP
ICHG Transconductance
ICHG Accuracy
0.95
1.05
µS
%
µS
%
%
V
V
V
- V
- V
= 0.185V
= 0.05V
-5
+5
CSIP
CSIP
CSIN
-10
+10
CSIN
V
V
to (V
= 0.185V; V
- V
); V
-
IINP
CSSN
CSSP
CSSN
IINP
CSSP
IINP Transconductance
IINP Current Accuracy
CSSP - CSSN Accuracy
0.85
1.00
1.15
= 0V, 3.0V (Note 3)
V
V
V
V
- V
- V
- V
- V
= 0.185V
= 0.05V
-15
-20
-10
-10
+15
+20
+10
+10
CSSP
CSSP
CSSP
CSSP
CSSN
CSSN
CSSN
CSSN
(Note 3)
= 1.6V
= 0.08V, V
CLS
= 0.2V, CLS = REF
CSSP + CSSN Input Voltage
Range
8.0
28
LꢀGIC LEꢁELS
CELLS Input Low Voltage
0.2
V
V
V
LDO
CELLS Input Middle Voltage
CELLS Input High Voltage
0.4
- 0.5
V
LDO
V
V
LDO
- 0.25
V
V
V
= 0V or V
= 0.4V
CELLS Input Bias Current
ACOK Sink Current
-10
1
+10
µA
mA
µA
CELLS
ACOK
ACOK
LDO
= 5.5V
ACOK Leakage Current
-1
+1
4
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
