Rainbow Electronics MAX1870A - Manual (Page 6)

MAX1870A
Step-Up/Step-Down
Li+ Battery Charger
6 _______________________________________________________________________________________
PARAMETER CONDITIONS MIN TYP MAX UNITS
CHARGE-VOLTAGE REGULATION
VCTL Range 0 3.6 V
V
VCTL
= V
LDO
(2 cells) -0.8 +0.8
V VCTL = V LDO (3 cells) -0.8 +0.8
V VCTL = V LDO (4 cells) -0.8 +0.8
V VCTL = V REFIN (2 cells) -1.2 +1.2
V VCTL = V REFIN (3 cells) -1.2 +1.2
V VCTL = V REFIN (4 cells) -1.2 +1.2
V VCTL = V REFIN / 20 (2 cells) -1.4 +1.4
V VCTL = V REFIN / 20 (3 cells) -1.4 +1.4
Battery Regulation Voltage
Accuracy
V VCTL = V REFIN / 20 (4 cells) -1.4 +1.4
%
VCTL Default Threshold VCTL rising 4.0 4.2 V
CHARGE-CURRENT REGULATION
ICTL Range 0 3.6 V
V
ICTL
= V
REFIN
66 80
V ICTL = V REFIN x 0.8 53 65 Quick-Charge-Current Accuracy
V ICTL = V REFIN x 0.583 38 48
mV
BATT/CSIP/CSIN Input Voltage
Range
0 19 V
CSIP Input Current ICTL = REFIN 600 µA
ICTL Power-Down-Mode
Threshold Voltage REFIN /
100
REFIN /
32
V
INPUT-CURRENT REGULATION
CLS = REF 95 115 Charger-Input Current-Limit
Accuracy (V
CSSP - V CSSN )
CSSS = CSSP
CLS = REF x 0.845 79 97
mV
CLS = REF 95 115 System-Input Current-Limit
Accuracy (V
CSSP - V CSSS )
CSSN = CSSP
CLS = REF x 0.845 79 97
mV
CSSP/CSSS/CSSN Input Voltage
Range
8 28 V
CSSP Input Current V CSSP = V CSSN = V CSSS = V DCIN = 8V, 28V 1200 µA
CLS Input Range V REF / 2 V REF V
IINP Transconductance V CSSP - V CSSS = 102mV, CSSN = CSSP 2.5 3.1 µA/mV
V CSSP - V CSSN = 200mV, V IINP = 0V 350
IINP Output Current
V CSSP - V CSSS = 200mV, V IINP = 0V 350
µA
V
CSSP
- V
CSSN
= 200mV, IINP float 3.5
IINP Output Voltage
V CSSP - V CSSS = 200mV, IINP float 3.5
V
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 2, V DCIN = V CSSP = V CSSN = V CSSS = V VHP = 18V, V BATT = V CSIP = V CSIN = V BLKP = 12V, V REFIN = 3.0V, V ICTL =
0.75 x V REFIN , VCTL = LDO, CELLS = FLOAT, GND = PGND = 0, V DLOV = 5.4V, T A = -40°C to +85°C.) (Note 1)