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 = -4±°C tV +8.°C, unless otherwise noted.) (Note 1)
ꢃ
PꢃRꢃMETER
SYMBꢀL
CꢀNDITIꢀNS
MIN
TYP
MꢃX
ꢄNITS
ICTL Power-Down Mode
Threshold Voltage
REFIN
/100
REFIN
/33
V
V
= V
(2, 3, or 4 cells)
VCTL
REFIN
MAX172
-1
+1
+1
(see Equation 1)
Battery Regulation Voltage
Accuracy
%
V
= V /20 (2, 3, or 4 cells)
REFIN
VCTL
-1
(see Equation 1)
REFIN Range
2.0
3.6
1.92
+5
V
V
REFIN Undervoltage Lockout
V
V
V
V
V
V
- V
- V
= 0.185V
= 0.05V
-5
CSIP
CSIP
CSSP
CSSP
CSSP
CSSP
CSIN
ICHG Accuracy
%
%
%
V
-10
-15
-20
-10
-10
+10
+15
+20
+10
+10
CSIN
- V
- V
- V
- V
= 0.185V
CSSN
IINP Current Accuracy
CSSP - CSSN Accuracy
(Note 3)
= 1.6V
= 0.05V
CSSN
CSSN
CSSN
= 0.08V, V
CLS
= 0.2V, CLS = REF
CSSP + CSSN Input Voltage
Range
8
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
NVte 2: Guaranteed by design. Not production tested.
NVte 3: Tested under DC conditions. See text for more detail.
6
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
