MAX1758 Datasheet, PDF (5/17 Pages) Maxim Integrated Products – Stand-Alone, Switch-Mode Li Battery Charger with Internal 28V Switch

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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
FASTCHG, FULLCHG, FAULT
Output Low Voltage
V_OL I_SINK = 5mA
0.5
V
FASTCHG, FULLCHG, FAULT
Output High Leakage
V _FASTCHG, V _FULLCHG, V _FAULT = 28V,
V _SHDN = GND
1
µA
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
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
SUPPLY AND REFERENCE
DCIN Input Voltage Range
6
28
V
VL Output Voltage
5.1
5.7
V
REF Output Voltage
REF Line Regulation
SWITCHING REGULATOR
6V < V_DCIN < 28V
6V < V_DCIN < 28V
4.166
4.242
V
6
mV
PWM Oscillator Frequency
HSD to LX On-Resistance
LX to PGND On-Resistance
f_OSC
Nondropout f_OSC
V_BST = V_LX + 4.5V
260
340 kHz
450
mΩ
2
Ω
CS to BATT Hard Current Limit
Instantaneous peak current limit
2.2
3.2
A
BATT, CS Input Voltage Range
0
19
V
ACCURACY AND ERROR AMPLIFIERS
Absolute Voltage Accuracy
Not including VADJ resistor tolerances
-0.8
With 1% VADJ resistors
-1
0.8
%
1
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
CSSP to CSSN 1/10-Scale
Current-Sense Voltage
V_SETIN = V_REF / 10
5
15
mV
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
V
51.5
µA
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