Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 28V Switch
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
DCIN
= V
HSD
= V
CSSP
= V
CSSN
= 18V, V
SHDN
= V
VL
, V
CELL
= GND, V
BATT
= V
CS
= 4.2V, V
VADJ
= V
REF
/ 2,
V
ISETIN
= V
ISETOUT
= V
REF
, R
THM
= 10kΩ,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
FASTCHG, FULLCHG, FAULT
Output Low Voltage
FASTCHG, FULLCHG, FAULT
Output High Leakage
SYMBOL
V
OL
I
SINK
= 5mA
V
FASTCHG
, V
FULLCHG
, V
FAULT
= 28V,
V
SHDN
= GND
CONDITIONS
MIN
TYP
MAX
0.5
1
UNITS
V
µA
MAX1758
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
DCIN
= V
HSD
= V
CSSP
= V
CSSN
= 18V, V
SHDN
= V
VL
, V
CELL
= GND, V
BATT
= V
CS
= 4.2V, V
VADJ
= V
REF
/ 2,
V
ISETIN
= V
ISETOUT
= V
REF
, R
THM
= 10kΩ,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 7)
PARAMETER
SUPPLY AND REFERENCE
DCIN Input Voltage Range
VL Output Voltage
REF Output Voltage
REF Line Regulation
SWITCHING REGULATOR
PWM Oscillator Frequency
HSD to LX On-Resistance
LX to PGND On-Resistance
CS to BATT Hard Current Limit
BATT, CS Input Voltage Range
ACCURACY AND ERROR AMPLIFIERS
Absolute Voltage Accuracy
BATT Regulation Voltage
BATT Full-Scale Charge Current
BATT 1/10-Scale Charge
Current (Note 1)
BATT Charge Current in
Prequalification State
CSSP to CSSN Full-Scale
Current-Sense Voltage
CSSP to CSSN 1/10-Scale
Current-Sense Voltage
STATE MACHINE
THM Trip Threshold Voltage
THM Low-Temp Current
V
TRT
I
TLTC
THM low - temp or high-temp current
V
THM
= 1.4V
1.386
46.2
1.414
51.5
V
µA
V
SETIN
= V
REF
/ 10
V
SETOUT
= V
REF
/ 10
V
BATT
< 2.4V per cell
Not including VADJ resistor tolerances
With 1% VADJ resistors
CELL = float, GND, VL, or REF
-0.8
-1
4.158
1.3
100
100
85
5
0.8
1
4.242
1.7
200
200
115
15
%
V/cell
A
mA
mA
mV
mV
Instantaneous peak current limit
2.2
0
f
OSC
Nondropout f
OSC
V
BST
= V
LX
+ 4.5V
260
340
450
2
3.2
19
kHz
mΩ
Ω
A
V
6V < V
DCIN
< 28V
6V < V
DCIN
< 28V
6
5.1
4.166
28
5.7
4.242
6
V
V
V
mV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
