MAX712CPE Maxim Integrated Products, MAX712CPE Datasheet - Page 3

IC BATT FASTCHRG NICD/NIMH 16DIP

MAX712CPE

Manufacturer Part Number
MAX712CPE
Description
IC BATT FASTCHRG NICD/NIMH 16DIP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX712CPE

Function
Charge Management
Battery Type
Nickel Cadmium (NiCd), Nickel Metal-Hydride (NiMH)
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
16-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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ELECTRICAL CHARACTERISTICS (continued)
(I
BATT-, not GND.)
Note 1: The MAX712/MAX713 are powered from the V+ pin. Since V+ shunt regulates to +5V, R1 must be small enough to allow at
Note 2: Offset voltage of THI and TLO comparators referred to TEMP.
Note 3: t
Note 4: This specification can be violated when attempting to charge more or fewer cells than the number programmed. To ensure
(T
V
FASTCHG Low Current
FASTCHG High Current
A/D Input Range (Note 4)
+ = 10mA, T
A
100
0.1
10
1
= +25°C, unless otherwise noted.)
1.95
least 5mA of current into the V+ pin.
proper voltage-slope fast-charge termination, the (maximum battery voltage) ÷ (number of cells programmed) must fall
within the A/D input range.
CURRENT ERROR-AMPLIFIER
A
1.97
is the A/D sampling interval (Table 3).
TRANSCONDUCTANCE
VOLTAGE ON CC PIN (V)
A
PARAMETER
= T
-10
-20
1.99
20
10
0
MIN
1k
FASTCHG = 0V, V+ = 5V
_______________________________________________________________________________________
FREQUENCY RESPONSE (with 15pF)
BATT-
V
GND
+
-
2.01
IN
to T
CURRENT-SENSE AMPLIFIER
CURRENT-
10k
SENSE
MAX
AMP
2.03
FREQUENCY (Hz)
, unless otherwise noted. Refer to the Typical Operating Circuit. All measurements are with respect to
BATT-
CC
Φ
100k
V
2.05
OUT
+
-
FASTCHG = 0V
C2 = 15pF
1M
A
5.6
5.4
4.8
4.6
5.8
5.2
5.0
4.4
4.2
4.0
V
MAX712/13 toc01
V
V
Battery voltage ÷ number of cells programmed
0
FASTCHG
FASTCHG
10M
DRV NOT SINKING CURRENT
SHUNT-REGULATOR VOLTAGE
10
0
40
-40
-80
-120
CURRENT INTO V+ PIN (mA)
= 0.4V
= 10V
20
vs. CURRENT
DRV SINKING CURRENT
CONDITIONS
30
Fast-Charge Controllers
40
Typical Operating Characteristics
50
NiCd/NiMH Battery
60
-20
-10
0
20
10
10
FREQUENCY RESPONSE (with 10nF)
1.6
0.8
0.4
CURRENT-SENSE AMPLIFIER
1.4
1.2
1.0
0.6
0.2
0
ALPHA SENSORS PART No. 14A1002
100
STEINHART-HART INTERPOLATION
FREQUENCY (Hz)
MIN
1.4
10
2
Φ
BATTERY TEMPERATURE(°C)
20
FASTCHG = 0V
TYP
1k
C2 = 10nF
A
30
V
MAX712/13 toc02
40
MAX
1.9
10
10k
MAX712/13 toc05
50
40
0
-40
-80
-120
UNITS
60
mA
µA
V
35
30
25
20
15
10
5
0
3

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