MAX1909 Maxim Integrated Products, MAX1909 Datasheet - Page 8

• Manufacturer Part Number: MAX1909
• Description: (MAX8725 / MAX1909) Multichemistry Battery Charger
• Manufacturer: Maxim Integrated Products

Multichemistry Battery Chargers with Automatic
System Power Selector
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
REF, GND = PGND = 0, PKPRES = GND, LDO = DLOV, T
8
LDO Undervoltage-Lockout Trip
Point
REFERENCE
REF Output Voltage
REF Undervoltage-Lockout Trip
Point
TRIP POINTS
BATT POWER_FAIL Threshold
BATT POWER_FAIL Threshold
Hysteresis
ACIN Threshold
ACIN Threshold Hysteresis
SWITCHING REGULATOR
DHI Off-Time
DHI Minimum Off-Time
DLOV Supply Current
Sense Voltage for Battery
Undervoltage Charge Current
Battery Undervoltage Threshold
DHIV Output Voltage
DHIV Sink Current
DHI On-Resistance Low
DHI On-Resistance High
DLO On-Resistance High
DLO On-Resistance Low
ERROR AMPLIFIERS
GMV Loop Transconductance
GMI Loop Transconductance
GMS Loop Transconductance
CCI/CCS/CCV Clamp Voltage
LOGIC LEVELS
MODE Input Low Voltage
MODE Input Middle Voltage
_______________________________________________________________________________________
PARAMETER
DCIN
= V
CSSP
= V
SYMBOL
CSSN
I
DLOV
Ref
= 18V, V
V
0 < I
REF falling
V
ACIN rising
V
V
DLO low
MAX1909 only, BATT = 3.0V per cell
MAX1909 only, MODE = float (3 cell),
V
MAX1909 only, MODE = LDO (4 cell),
V
With respect to SRC
DHI = V
DHI = V
V
V
V C TL = 3.6, V
V C TL = 3.6, V
MAX1909: ICTL = 3.6V, MAX8725: V
3.2V, V
V CLS = 2.048V, V
0.25V < V
0.25V < V
DCIN
DCIN
BATT
BATT
BATT
BATT
DLOV
DLOV
BATT
REF
A
= 8.0V
- V
= 16.0V, V
= 16.0V, V
rising
rising
CSSP
= V
= 4.5V, I
= 4.5V, I DLO = -100mA
DHIV
CSSN
= -40°C to +85°C, unless otherwise noted.)
< 500µA
BATT
CCV
CCS
CSIP
, I
- V
BATT
BATT
, I
, V
DHI
< 2.0V, 0.25V < V
< 2.0V
DHI
CONDITIONS
CSIN
= V
DLO
DCIN
DCIN
DCIN
CSSP
= -10mA
= 16.8V , M OD E = LD O
= 12.6V , M OD E = FLOAT
CSIN
= 10mA
= +100mA
= 75mV
falling
= 19V, V
= 17V, V
- V
= 12V, V
CSSN
MODE
MODE
= 75mV
CCI
VCTL
< 2.0V,
ICTL
= 3.6V
= 3.6V
= V
ICTL
=
= 1.8V, MODE = float, ACIN = 0, CLS =
4.1960
12.235
0.0625
0.0833
2.007
MIN
3.20
9.18
100
360
260
-4.5
150
0.5
0.5
1.6
50
10
10
3
TYP
4.2520
12.565
0.2500
0.3330
2.089
MAX
5.15
9.42
150
300
440
350
-5.5
600
3.9
2.0
2.0
0.8
2.0
30
10
6
5
4
7
3
UNITS
mA/V
mA/V
mA/V
mV
mV
mV
mV
mA
mV
µA
ns
ns
Ω
Ω
Ω
Ω
V
V
V
V
V
V
V
V