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MAX1758EAI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
MAX1758
Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 28V Switch
4 _______________________________________________________________________________________
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.)
CONDITIONS
% of
V
BATTR
x cell
94 95 96
BATT Recharge Voltage
Threshold (Note 6)
mA250 330 400
FULLCHG BATT Current
Termination Threshold (Note 5)
V/cell4.55 4.67 4.8
BATT Overvoltage Threshold
(Note 4)
V/cell2.4 2.5 2.6
BATT Undervoltage Threshold
(Note 3)
UNITSMIN TYP MAXSYMBOLPARAMETER
TIMER1 and TIMER2
Oscillation Frequency
2.1 2.33 2.6 kHz
Prequalification Timer 6.25 7.5 8.75
Fast-Charge Timer 81 90 100
Full-Charge Timer 81 90 100
Top-Off Timer 40.5 45 49.8
Temperature Measurement
Frequency
0.98 1.12 1.32 Hz
SHDN Input Voltage High
V
IH
1.4 V
SHDN Input Voltage Low
V
IL
0.6 V
VADJ, ISETIN, ISETOUT Input
Voltage Range
0V
REF
V
V
VADJ
, V
ISETIN
, V
ISETOUT
= 0 or 4.2V nA
SHDN Input Bias Current
V
SHDN
= 0 or V
VL
-1 1 µA
ISETOUT Shutdown Threshold
Voltage (Note 3)
150 220 300 mV
CELL Input Bias Current V
CELL
= 0 or V
VL
-5 5 µA
VADJ, ISETIN, ISETOUT Input
Bias Current
CELL Input Voltage
For 1 cell 0 0.5
For 3 cells V
REF
- 0.3 V
REF
+ 0.3
For 2 cells (floating) 1.5 2.5
-50 50
CONTROL INPUTS/OUTPUTS
min
min
min
min
V
V
VL
- 0.4 V
VL
For 4 cells
MAX1758
Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 28V Switch
_______________________________________________________________________________________ 5
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.)
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)
CONDITIONS
DCIN Input Voltage Range 628V
UNITSMIN TYP MAXSYMBOLPARAMETER
VL Output Voltage 5.1 5.7 V
REF Output Voltage 6V < V
DCIN
< 28V 4.166 4.242 V
REF Line Regulation 6V < V
DCIN
< 28V 6 mV
PWM Oscillator Frequency f
OSC
Nondropout f
OSC
260 340 kHz
HSD to LX On-Resistance V
BST
= V
LX
+ 4.5V 450 mΩ
LX to PGND On-Resistance 2 Ω
CS to BATT Hard Current Limit Instantaneous peak current limit 2.2 3.2 A
BATT, CS Input Voltage Range 019V
Absolute Voltage Accuracy
Not including VADJ resistor tolerances -0.8 0.8
%
With 1% VADJ resistors -1 1
CSSP to CSSN 1/10-Scale
Current-Sense Voltage
V
SETIN
= V
REF
/ 10 515mV
THM Trip Threshold Voltage V
TRT
THM low-temp or high-temp current 1.386 1.414 V
THM Low-Temp Current I
TLTC
V
THM
= 1.4V 46.2 51.5 µA
V
FASTCHG
, V
FULLCHG
, V
FAULT
= 28V,
V
SHDN
= GND
I
SINK
= 5mA
CONDITIONS
µA1
FASTCHG, FULLCHG, FAULT
Output High Leakage
V0.5V
OL
FASTCHG, FULLCHG, FAULT
Output Low Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
SUPPLY AND REFERENCE
SWITCHING REGULATOR
ACCURACY AND ERROR AMPLIFIERS
STATE MACHINE
BATT Regulation Voltage CELL = float, GND, VL, or REF 4.158 4.242 V/cell
BATT Full-Scale Charge Current 1.3 1.7 A
BATT 1/10-Scale Charge
Current (Note 1)
V
SETOUT
= V
REF
/ 10 100 200 mA
BATT Charge Current in
Prequalification State
V
BATT
< 2.4V per cell 100 200 mA
CSSP to CSSN Full-Scale
Current-Sense Voltage
85 115 mV
250 400
MAX1758
Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 28V Switch
6 _______________________________________________________________________________________
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
= -40°C to +85°C, unless otherwise noted.) (Note 7)
Note 1: When V
ISETOUT
= 0, battery charger turns off.
Note 2: See Thermistor section.
Note 3: Below this threshold, charger reverts to a prequalification mode with I
BATT
reduced to 10% of full scale.
Note 4: Above this threshold, charger is disabled.
Note 5: After full-charge state is complete and peak inductor current falls below this threshold, FULLCHG output switches high.
Battery charging continues until top-off timeout occurs. See Table 1.
Note 6: After charging is complete, when BATT voltage falls below this threshold, a new charging cycle is initiated.
Note 7: Specifications to -40°C are guaranteed by design, not production tested.
CONTROL INPUTS/OUTPUTS
V0.6V
IL
SHDN Input Voltage Low
V1.4V
IH
SHDN Input Voltage High
Hz0.93 1.37
Temperature Measurement
Frequency
PARAMETER SYMBOL MIN TYP MAX UNITS
BATT Undervoltage Threshold
(Note 3)
2.4 2.6 V/cell
BATT Overvoltage Threshold
(Note 4)
4.55 4.8 V/cell
FULLCHG BATT Current
Termination Threshold (Note 5)
mA
CONDITIONS
CONTROL INPUTS/OUTPUTS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX1758EAI

Mfr. #:
Buy MAX1758EAI
Manufacturer:
Maxim Integrated
Description:
Battery Management Li+ Battery Charger w/28V Switch
Lifecycle:
New from this manufacturer.
Delivery:
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