NiCd/NiMH Battery

Fast-Charge Controllers

4

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____________________________Typical Operating Characteristics (continued)

1.45

0

MAX713

NiMH BATTERY-CHARGING

CHARACTERISTICS AT C RATE

1.50

CHARGE TIME (MINUTES)

1.60

1.55

25

30

40

35

30

90

60

∆V

∆t

CUTOFF

V

T

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

1.40

0

MAX713

NiMH BATTERY-CHARGING

CHARACTERISTICS AT C/2 RATE

1.45

CHARGE TIME (MINUTES)

1.55

1.50

25

30

40

35

50

150

100

∆V

∆t

CUTOFF

V

T

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

20

10

5-MINUTE REST

BETWEEN CHARGES

∆V

∆t

CUTOFF

V

T

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

1.40

0

MAX713

NiCd BATTERY-CHARGING

CHARACTERISTICS AT C RATE

1.45

CHARGE TIME (MINUTES)

1.55

1.50

25

30

40

35

30

90

60

∆V

∆t

CUTOFF

V

T