MAX1772 Datasheet, PDF (5/20 Pages) Maxim Integrated Products – Low-Cost, Multichemistry Battery- Charger Building Block

Low-Cost, Multichemistry Battery-
Charger Building Block
ELECTRICAL CHARACTERISTICS
(V_DCIN = V_CSSP = V_CSSN = 18V, V_BATT = V_CSIP = V_CSIN = 12V, V_REFIN = 3.0V, V_VCTL = V_ICTL = 0.75 ✕ REFIN, CELLS = 2.0V,
ACIN = 0, CLS = REF, V_BST - V_LX = 4.5V, GND = PGND = 0, C_LDO = 1µF, LDO = DLOV, C_REF = 1µF; pins CCI, CCS, and CCV are
compensated per Figure 1a; T_A = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
SUPPLY AND LDO REGULATOR
DCIN Input Voltage Range
V_DCIN
8.0
28.0
V
DCIN Undervoltage Lockout
Trip Point
DCIN falling
DCIN rising
7
V
7.85
DCIN Quiescent Current
I_DCIN
8.0V < V_DCIN < 28V
6
mA
LDO Output Voltage
8.0V < V_DCIN < 28V, no load
5.25
5.65
V
TRIP POINTS
BATT POWER_FAIL Threshold
V_CSSP falling
50
150
mV
BATT POWER_FAIL Threshold
Hysteresis
100
300
mV
ACIN Threshold
ACIN Threshold Hysteresis
ACIN Input Bias Current
CLS Input Range
CLS Input Bias Current
SWITCHING REGULATOR
Minimum Off-Time
Maximum On-Time
Oscillator Frequency
DHI Maximum Duty Cycle
BATT Input Current
CSIP/CSIN Input Current
CSSP/CSSN Input Current
f_OSC
I_BATT
ACIN rising
0.5% of REF
V_ACIN = 2.048V
V_CLS = 2.0V
V_BATT = 16.8V
(Note 1)
V_BATT = 19V, V_DCIN = 0
V_BATT = 2V to 19V, V_DCIN > V_BATT + 0.3V
V_DCIN = 0
V_CSIP = V_CSIN = 12V
V_DCIN = 0
V_CSSP = V_CSSN = V_DCIN > 8.0V
2.007
10
-1
1.6
-1
1
5
99
2.089
V
30
mV
+1
µA
REF
V
+1
µA
1.5
µs
15
ms
400
kHz
%
5
µA
500
5
µA
800
0.3
µA
800
BATT/CSIP/CSIN Input Voltage
Range
0
19
V
CSIP to CSIN Full-Scale
Current-Sense Voltage
V_BATT = 12V
189
219
mV
CSSP to CSSN Full-Scale
Current-Sense Voltage
CURRENT AND VOLTAGE SETTING
Charging Current Accuracy
ICTL, VCTL, REFIN Input Bias
Current
189
ICTL = REFIN (see Equation 2)
-8
ICTL = REFIN/32 (see Equation 2)
-55
V_VCTL = V_ICTL = V_REFIN = 3V
-1
V_DCIN = 0, V_VCTL = V_ICTL = V_REFIN = 5V
-1
219
mV
+8
%
+55
+1
µA
+1
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