NiCd/NiMH Battery
Fast-Charge Controllers
MAX712/MAX713
ABSOLUTE MAXIMUM RATINGS
V+ to BATT- .................................................................-0.3V, +7V
BATT- to GND ........................................................................±1V
BATT+ to BATT-
Power Not Applied............................................................±20V
With Power Applied ................................The higher of ±20V or
±2V x (programmed cells)
DRV to GND ..............................................................-0.3V, +20V
FASTCHG
to BATT- ...................................................-0.3V, +12V
All Other Pins to GND......................................-0.3V, (V+ + 0.3V)
V+ Current.........................................................................100mA
DRV Current. .....................................................................100mA
REF Current.........................................................................10mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C............842mW
Narrow SO (derate 8.70mW/°C above +70°C .............696mW
CERDIP (derate 10.00mW/°C above +70°C ................800mW
Operating Temperature Ranges
MAX71_C_E .......................................................0°C to +70°C
MAX71_E_E .................................................... -40°C to +85°C
MAX71_MJE ................................................. -55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(I
V+
= 10mA, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Refer to
Typical Operating Circuit.
All measurements are with respect to
BATT-, not GND.)
PARAMETER
V+ Voltage
I
V+
(Note 1)
BATT+ Leakage
BATT+ Resistance with Power On
C1 Capacitance
C2 Capacitance
REF Voltage
Undervoltage Lockout
External VLIMIT Input Range
THI, TLO, TEMP Input Range
THI, TLO Offset Voltage (Note 2)
THI, TLO, TEMP, VLIMIT Input Bias Current
VLIMIT Accuracy
Internal Cell Voltage Limit
Fast-Charge VSENSE
PGM3 = V+
Trickle-Charge VSENSE
PGM3 = open
PGM3 = REF
PGM3 = BATT-
Voltage-Slope Sensitivity (Note 3)
Timer Accuracy
Battery-Voltage to Cell-Voltage
Divider Accuracy
DRV Sink Current
2
V
DRV
= 10V
MAX713
MAX712
-15
-1.5
30
1.2V < V
LIMIT
< 2.5V, 5mA < I
DRV
< 20mA,
PGM0 = PGM1 = V+
V
LIMIT
= V+
0V < TEMP < 2V, TEMP voltage rising
0mA < I
REF
< 1mA
Per cell
V+ = 0V, BATT+ = 17V
PGM0 = PGM1 = BATT-, BATT+ = 30V
30
0.5
5
1.96
0.35
1.25
0
-10
-1
-30
1.6
225
1.5
4.5
12.0
26.0
1.65
250
3.9
7.8
15.6
31.3
-2.5
0
15
1.5
2.04
0.50
2.50
2
10
1
30
1.7
275
7.0
12.0
20.0
38.0
mV/t
A
per cell
%
%
mA
mV
CONDITIONS
5mA < I
V+
< 20mA
MIN
4.5
5
5
TYP
MAX
5.5
UNITS
V
mA
µA
kΩ
µF
nF
V
V
V
V
mV
µA
mV
V
mV
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
