Rainbow Electronics MAX1870A - Manual (Page 8)

MAX1870A
Step-Up/Step-Down
Li+ Battery Charger
8 _______________________________________________________________________________________
PARAMETER CONDITIONS MIN TYP MAX UNITS
ERROR AMPLIFIERS
GMV Amplifier Loop
Transconductance
V C TL = RE FIN , V BAT T = 16.8V 0.05 0.20 µA/mV
GMI Amplifier Loop
Transconductance
ICTL = REFIN, V CSIP - V CSIN = 72mV 1.8 3.0 µA/mV
V CLS = REF, V CSSP - V CSSN = 102mV, V CSSP = V CSSS 1.2 2.2 GMS Amplifier Loop
Transconductance
V CLS = REF, V CSSP - V CSSS = 102mV, V CSSP = V CSSN 1.2 2.2
µA/mV
VCTL = REFIN, V BATT = 15.8V 50
CCV Output Current
VCTL = REFIN, V BATT = 17.8V -50
µA
ICTL = REFIN, V CSIP - V CSIN = 0mV 150
CCI Output Current
ICTL = REFIN, V CSIP - V CSIN = 150mV -150
µA
CLS = REF, V CSSP = V CSSN , V CSSP = V CSSS 100
CCS Output Current CLS = REF, V CSSP - V CSSN = 200mV,
V CSSP - V CSSS = 200mV
-100
µA
CCI/CCS/CCV Clamp Voltage
1.1V < V CCV < 3.5V, 1.1V < V CCS < 3.5V,
1.1V < V CCI < 3.5V
100 500 mV
LOGIC LEVELS
ASNS Output-Voltage Low V IINP = GND, I SINK = 1mA 0.4 V
ASNS Output-Voltage High V IINP = 4V, I SOURCE = 1mA
LDO -
0.5
V
ASNS Current Detect V IINP rising 1.1 1.15 1.2 V
SHDN Threshold SHDN falling, V
REFIN = 2.8V to 3.6V 22 25
% of
REFIN
CELLS Input Low Voltage 0.75 V
CELLS Float Voltage 40 60
% of
REFIN
CELLS Input High Voltage
RE FIN -
0.75V
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)
Note 1: Specifications to -40°C are guaranteed by design, not production tested.