NiCd/NiMH Battery

Fast-Charge Controllers

4

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Typical Operating Characteristics (continued)

90

MAX713

NiMH BATTERY CHARGING

CHARACTERISTICS AT C RATE

CHARGE TIME (MINUTES)

030

60

V

T

MAX712/13 toc07

∆V

∆t

CUTOFF

1.60

1.45

1.55

1.50

40

25

35

30

150

MAX713

NiMH BATTERY CHARGING

CHARACTERISTICS AT C/2 RATE

1.55

1.40

050

1.50

1.45

40

25

35

30

V

T

∆V

∆t

CUTOFF

CHARGE TIME (MINUTES)

100

MAX712/13 toc09

1.40

0

MAX713

NiCd BATTERY-CHARGING

CHARACTERISTICS AT C/2 RATE

1.45

CHARGE TIME (MINUTES)

1.50

25

30

35

50

150

100

∆V

∆t

CUTOFF

V

T

MAX712/13 toc08

15

20

MAX713

CHARGING CHARACTERISTICS OF A

FULLY-CHARGED NiMH BATTERY

1.60

CHARGE TIME (MINUTES)

1.45

1.65

05

1.55

1.50

40

25

35

30

10

V

T

∆V

∆t

CUTOFF

5 MINUTE REST

BETWEEN CHARGES

MAX712/13 toc10

1.45

0

MAX713

CHARGING CHARACTERISTICS OF A

FULLY CHARGED NiMH BATTERY

1.50

CHARGE TIME (MINUTES)

1.60

1.65

1.55

25

30

40

35

515

10

5-HOUR REST

BETWEEN CHARGES

∆V

∆t

CUTOFF

V

T

20

MAX712/13 toc11

90

MAX713

NiCd BATTERY CHARGING

CHARACTERISTICS AT C RATE

1.55

CHARGE TIME (MINUTES)

1.40

030

1.50

1.45

40

25

35

30

60

V

T

∆V

∆t

CUTOFF

MAX712/13 toc06