Datasheet

MAX1758
Stand-Alone, Switch-Mode
Li+ Battery Charger with Internal 28V Switch
3
Maxim Integrated
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.)
V
ADJ
= GND
Instantaneous peak current limit
With 1% VADJ resistors
Not including VADJ resistor tolerances
CELL = float, GND, VL, or REF
CONDITIONS
3.948 3.979 4.010
BATT Regulation Voltage
Adjustment Range
-1 1
Absolute Voltage Accuracy %
-0.8 0.8
V/cell4.167 4.2 4.233V
BATTR
Battery Regulation Voltage
V019BATT, CS Input Voltage Range
A2.4 2.7 3.0CS to BATT Hard Current Limit
UNITSMIN TYP MAXSYMBOLPARAMETER
V
ADJ
= REF
V/cell
4.386 4.421 4.453
V
CCV
= 2V
mS ×
cells
0.4 0.7 1.0
CCV Amplifier
Transconductance
V
CCV
= 2V µA±50
CCV Amplifier Maximum Output
Current
A1.35 1.5 1.65BATT Full-Scale Charge Current
V
ISETOUT
= V
REF
/ 10 mA100 150 200
BATT 1/10-Scale Charge
Current (Note 1)
V
BATT
< 2.4V per cell mA100 150 200
BATT Charge Current in
Prequalification State
V
CCI
= 2V µA/A60 130 240CCI Battery Current Sense Gain
V
CCI
= 2V µA±100
CCI Amplifier Maximum Output
Current
mV90 100 115
CSSP to CSSN Full-Scale
Current-Sense Voltage
V
ISETIN
= V
REF
/ 10 mV51015
CSSP to CSSN 1/10-Scale
Current-Sense Voltage
V
CCS
= 2V mS1.0 2.0 3.0CCS Amplifier Transconductance
mV25 200
CCV Clamp Voltage with
Respect to CCI, CCS
THM low-temp or high-temp current V1.386 1.40 1.414V
TRT
THM Trip Threshold Voltage
V
THM
= 1.4V µA46.2 49 51.5I
TLTC
THM Low-Temp Current
V
THM
= 1.4V µA344 353 362I
THTC
THM High-Temp Current
Combines THM low-temp current and THM
threshold, V
TRT
/ I
TLTC
kΩ26.92 28.70 30.59
THM COLD Threshold
Resistance (Note 2)
Combines THM high-temp current and THM
threshold, V
TRT
/ I
THTC
kΩ3.819 3.964 4.115
THM HOT Threshold Resistance
(Note 2)
VOLTAGE LIMIT ACCURACY
ERROR AMPLIFIERS
STATE MACHINE
V
CCS
= 2V µA±100
CCS Amplifier Maximum Output
Current
mV25 200
CCI, CCS Clamp Voltage with
Respect to CCV