MAX713CSE(2002) データシートの表示（PDF） - Maxim Integrated
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MAX713CSE Datasheet PDF : 17 Pages
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NiCd/NiMH Battery
Fast-Charge Controllers
The voltage-slope, fast-charge termination circuitry
might become disabled if attempting to charge a
different number of cells than the number programmed.
The switching frequency (nominally 30kHz) can be
decreased by increasing the value of the capacitor
connected between CC and BATT-. Make sure that
the two capacitors connected to the CC node are
placed as close as possible to the CC pin on the
MAX712/MAX713 and that their leads are of minimum
length. The CC node is a high-impedance point, so do
not route logic lines near the CC pin. The circuit of
Figure 19 cannot service a load while charging.
Order the MAX713SWEVKIT-SO for quick evaluation of
the MAX712/MAX713 in switch-mode operation. For
more information on switch-mode operation and
ordering information for external components, order the
MAX713EVKIT data sheet.
Battery-Charging Examples
Figures 13 and 14 show the results of charging 3 AA,
1000mAh, NiMH batteries from Gold Peak (part no.
GP1000AAH, GP Batteries (619) 438-2202) at a 1A rate
using the MAX712 and MAX713, respectively. The
Typical Operating Circuit is used with Figure 9a’s
thermistor configuration .
DC IN = Sony AC-190 +9VDC at 800mA AC-DC adapter
PGM0 = V+, PGM1 = REF, PGM2 = REF, PGM3 = REF
R1 = 200Ω, R2 = 150Ω, RSENSE = 0.25Ω
C1 = 1µF, C2 = 0.01µF, C3 = 10µF, VLIMIT = REF
R3 = 10kΩ, R4 = 15kΩ
T1, T2 = part #14A1002 (Alpha Sensors: 858-549-4660) R5
omitted, T3 omitted, TLO = BATT-
11
10
HIGH PEAK
9
8
120Hz
7
RIPPLE
LOW PEAK
6
5
0
200 400 600 800 1000
LOAD CURRENT (mA)
Figure 11. Sony CD Player AC Adapter AC-96N Load
Characteristic, 9VDC 600mA
18
16
14
HIGH PEAK
12
LOW PEAK
10
8
0
120Hz
RIPPLE
200 400
600
800
LOAD CURRENT (mA)
Figure 12. Panasonic Modem AC Adapter KX-A11 Load
Characteristic, 12VDC 500mA
MAX712/713
5.0
40
4.9
∆V
∆t
CUTOFF
38
4.8
36
4.7
34
V
4.6
32
4.5
30
T
4.4
28
4.3
4.2
0
30
60
TIME (MINUTES)
26
24
90
Figure 13. 3 NiMH Cells Charged with MAX712
5.0
4.9
4.8
4.7
4.6
4.5
4.4
4.3
4.2
0
∆V
∆t
CUTOFF
V
T
30
60
TIME (MINUTES)
MAX712/713
40
38
36
34
32
30
28
26
24
90
Figure 14. NiMH Cells Charged with MAX713
14 ______________________________________________________________________________________
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