Instruction Manual

MAX8730
Low-Cost Battery Charger
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. V
SRC
= V
ASNS
= V
CSSP
= V
CSSN
= 18V, V
BATT
= V
CSIP
= V
CSIN
= 12V, V
VCTL
= V
ICTL
= 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
PDS Turn-On Current PDS = SRC 6 12 mA
PDL Turn-On Resistance PDL = GND 50
100
200 kΩ
PDS/PDL Delay Time 5.0 µs
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CHARGE-VOLTAGE REGULATION
VCTL Range 0 3.6 V
Not including resistor
tolerances
-1.2 +1.2
V
VCTL
= 3.6V
or 0V
Including 1% resistor
tolerances
-1.25
+1.25
Battery-Regulation-Voltage
Accuracy
V
VCTL
= V
LDO
(3 or 4 cells) -0.8 +0.8
%
V
VCTL
Default Threshold V
VCTL
rising 4.4 V
VCTL Input Bias Current
SRC = BATT, ASNS = GND INPON =
REFON = 0, V
VCTL
= 5V
0 16 µA
CHARGE-CURRENT REGULATION
ICTL Range 0 3.6 V
128.25 141.75 mV
V
ICTL
= 3.6V
-5 +5 %
70 80 mV
Full-Charge-Current Accuracy
(CSIP to CSIN)
V
ICTL
= 2.0V
-6.7 +6.7 %
Trickle-Charge-Current Accuracy V
ICTL
= 120mV 2 10 mV
Charge-Current Gain Error Based on V
ICTL
= 3.6V and V
ICTL
= 0.12V -1.9 +1.9 %
Charge-Current Offset Error Based on V
ICTL
= 3.6V and V
ICTL
= 0.12V -2 +2 mV
BATT/CSIP/CSIN Input Voltage
Range
0 19 V
Charging enabled 1000
CSIP/CSIN Input Current
Charging disabled, SRC = BATT,
ASNS = GND, or V
ICTL
= 0V
16
µA
ICTL falling 50 80
ICTL Power-Down Mode
Threshold
ICTL rising 70 110
mV