MAX8724 Maxim Integrated Products, MAX8724 Datasheet - Page 9

• Manufacturer Part Number: MAX8724
• Description: (MAX1908 - MAX87xx) Low-Cost Multichemistry Battery Chargers
• Manufacturer: Maxim Integrated Products

ELECTRICAL CHARACTERISTICS (continued)
(V
REF, V
per Figure 1a; T
SUPPLY AND LDO REGULATOR
DCIN Input Voltage Range
DCIN Quiescent Current
BATT Input Current
LDO Output Voltage
LDO Load Regulation
REFERENCE
REF Output Voltage
TRIP POINTS
BATT Power-Fail Threshold
ACIN Threshold
SWITCHING REGULATOR
DHI Off-Time
DHI Minimum Off-Time
DHI Maximum On-Time
DHI Maximum Duty Cycle
Battery Undervoltage Charge
Current
Battery Undervoltage Current
Threshold
DHI On-Resistance High
DHI On-Resistance Low
DLO On-Resistance High
DLO On-Resistance Low
DCIN
BST
= V
PARAMETER
CSSP
- V
LX
Low-Cost Multichemistry Battery Chargers
A
= V
= 4.5V, ACIN = GND = PGND = 0, C
= -40°C to +85°C, unless otherwise noted.) (Note 2)
CSSN
_______________________________________________________________________________________
= 18V, V
BATT
SYMBOL
V
I
I
= V
DCIN
BATT
DCIN
CSIP
= V
8V < V
V
V
8V < V
0 < I
0 < I
V
(MAX1908/MAX8724 only)
V
(MAX8765 only)
ACIN rising (MAX8765 only)
ACIN rising (MAX1908/MAX8724 only)
V
V
V
V
V
MAX1908 only, V
CELLS = GND, MAX1908 only, V
CELLS = float, MAX1908 only, V
CELLS = V
V
V
V
V
BATT
BATT
DCIN
CSSP
BATT
CELLS
BATT
CELLS
BATT
BST
BST
DLOV
DLOV
CSIN
LDO
REF
- V
- V
LDO
DCIN
= 19V, V
= 2V to 19V, V
DCIN
falling, referred to V
= 16V, V
= 16V, V
= 3V per cell (RS2 = 15mΩ),
falling, referred to V
= 4.5V, I
= 4.5V, I
= V
= V
LX
LX
= 12V, V
< 500µA
< 10mA
REFIN
= 1µF, LDO = DLOV, C
= 4.5V, I
= 4.5V, I
REFIN
REFIN
< 28V
< 28V, no load
DCIN
DCIN
DCIN
DLO
DLO
CONDITIONS
, MAX1908 only, V
REFIN
BATT
DHI
DHI
= +100mA
= -100mA
= 0
= 19V,
= 17V,
DCIN
rising
= 3V, V
= +100mA
= -100mA
= 19.3V
CSIN
CSIN
VCTL
BATT
BATT
BATT
REF
= V
rising
rising
= 1µF; CCI, CCS, and CCV are compensated
ICTL
rising
= 0.75 x V
4.065
2.028
2.007
12.18
MIN
5.25
0.35
0.24
6.09
9.12
150
2.5
50
50
99
8
REFIN
TYP
, CELLS = FLOAT, CLS =
4.120
2.068
2.089
12.60
MAX
5.55
0.45
0.33
6.30
9.45
150
150
500
100
450
7.5
3.5
3.5
28
6
1
7
7
UNITS
mA
mV
mV
mA
ms
µA
µs
µs
%
Ω
Ω
Ω
Ω
V
V
V
V
V
9