MAX1908_09 Datasheet, PDF (7/30 Pages) Maxim Integrated Products – Low-Cost Multichemistry Battery Chargers

Low-Cost Multichemistry Battery Chargers
ELECTRICAL CHARACTERISTICS
(V_DCIN = V_CSSP = V_CSSN = 18V, V_BATT = V_CSIP = V_CSIN = 12V, V_REFIN = 3V, V_VCTL = V_ICTL = 0.75 x V_REFIN, CELLS = open, CLS =
REF, V_BST - V_LX = 4.5V, ACIN = GND = PGND = 0, C_LDO = 1µF, LDO = DLOV, C_REF = 1µF; CCI, CCS, and CCV are compensated
per Figure 1a; T_A = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
CHARGE-VOLTAGE REGULATION
Battery Regulation Voltage
Accuracy (2, 3, or 4 Cells)
REFIN Range
V_VCTL = V_REFIN
V_VCTL = V_REFIN/20
V_VCTL = V_LDO
(Note 1)
REFIN Undervoltage Lockout
V_REFIN falling
CHARGE CURRENT REGULATION
CSIP-to-CSIN Full-Scale Current-
Sense Voltage
V_ICTL = V_REFIN
Charging-Current Accuracy
V_ICTL = V_REFIN
V_ICTL = V_REFIN x 0.6
V_ICTL = V_LDO
MAX8765/MAX8765A only; V_ICTL = V_REFIN x
0.036
MAX8724 only;
V_ICTL = V_REFIN x 0.058
Charge-Current Gain Error
(MAX8765/MAX8765A Only)
Charge-Current Offset
(MAX8765/MAX8765A Only)
MIN
-0.6
-0.6
-0.6
2.5
70.5
-6
-7.5
-7.5
-50
-33
-2
-2
TYP
MAX UNITS
+0.6
+0.6
%
+0.6
3.6
V
1.92
V
79.5
mV
+6
+7.5
+7.5
%
+50
+33
+2
%
+2
mV
BATT/CSIP/CSIN Input Voltage
0
Range
CSIP/CSIN Input Current
V_DCIN = 0V or V_ICTL = 0V or V_SHDN = 0V
Charging
Cycle-by-Cycle Maximum Current
Limit
I_MAX
RS2 = 0.015Ω
6.0
19
V
1
µA
650
7.5
A
ICTL Power-Down Mode
Threshold Voltage
(MAX1908/MAX8724 Only)
V_ICTL rising
REFIN/
100
REFIN/
33
V
ICHG Transconductance
(MAX1908/MAX8724 Only)
ICHG Transconductance
(MAX8765/MAX8765A Only)
ICHG Transconductance Error
(MAX8765/MAX8765A Only)
ICHG Transconductance Offset
(MAX8765/MAX8765A Only)
G_ICHG V_CSIP - V_CSIN = 45mV
G_ICHG V_CSIP - V_CSIN = 45mV
2.7
2.785
-7.5
-6.5
3.3 µA/mV
3.225 µA/mV
+7.5
%
+6.5
µA
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