Max8730 low-cost battery charger – Rainbow Electronics MAX8730 User Manual
Page 7
MAX8730
Low-Cost Battery Charger
_______________________________________________________________________________________
7
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT-CURRENT REGULATION
CSSP-to-CSSN Full-Scale
Current-Sense Voltage
72.75
78.25
mV
V
CLS
= REF (trim point)
72.75
78.25
mV
V
CLS
= REF x 0.7
50.0
56.0
mV
Input Current-Limit Accuracy
V
CLS
= REF x 0.5
36.00
40.50
mV
CSSP/CSSN Input Voltage Range
8.0
28
V
CSSP/CSSN Input Current
V
CSSP
= V
CSSN
= V
SRC
> 8.0V
1000
µA
CLS Input Range
1.1
REF
V
IINP Transconductance
V
CSSP
- V
CSSN
= 56mV
2.66
2.94
µA/mV
V
CSSP
- V
CSSN
= 100mV, V
IINP
= 0 to 4.5V
-5
+5
V
CSSP
- V
CSSN
= 75mV
-8
+8
V
CSSP
- V
CSSN
= 56mV
-5
+5
IINP Accuracy
V
CSSP
- V
CSSN
= 20mV
-12.5
+12.5
%
IINP Gain Error
Based on V
I C T L
=
RE F x 0.5 and V
I C T L
= RE F
-7
+7
%
IINP Offset Error
Based on V
I C T L
=
RE F x 0.5 and V
I C T L
= RE F
-2
+2
mV
IINP Fault Threshold
IINP rising
4.1
4.3
V
SUPPLY AND LINEAR REGULATOR
SRC Input Voltage Range
8.0
28
V
SRC falling
7
SRC Undervoltage Lockout
Threshold
SRC rising
8
V
Normal mode
6
mA
V
INPON
= V
REFON
= low
20
V
INPON
= low,
V
REFON
= high
600
V
INPON
= high,
V
REFON
= low
600
SRC Quiescent Current
(INPON/REFON = Don’t Care)
SRC = VBATT =
12V, ASNS =
GND (Note 2)
V
INPON
= V
REFON
= high
600
µA
BATT Input Current
VBATT = 2V to 19V, VSRC > VBATT + 0.3V
600
µA
V
REFON
= 5.4V
600
Battery Leakage Current
I
CSIP
+ I
CSIN
+ I
BATT
+ I
CSSP
+ I
CSSN
+ I
SRC
,
ASNS = REFON = GND
INPON = GND
16
µA
LDO Output Voltage
8.0V < VSRC < 28V, no load
5.2
5.5
V
LDO Load Regulation
0 < ILDO < 10mA
50
mV
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
= -40°C to +85°C, unless otherwise noted.)