Rainbow-electronics MAX8730 Manual do Utilizador descarregar pdf (Página 10)

MAX8730

Low-Cost Battery Charger

10 ______________________________________________________________________________________

Typical Operating Characteristics

(Circuit of Figure 1, adapter = 19.5V, V

BATT

= 12V, V

ICTL

= 2.4V, MODE > 1.8V, REFON = INPON = LDO, V

RELTH

= V

REF

/2, T

+25°C, unless otherwise noted.)

TRICKLE-CHARGE CURRENT

vs. BATTERY VOLTAGE

BATTERY VOLTAGE (V)

TRICKLE-CHARGE-CURRENT ERROR (%)

MAX8730 toc07

0369121518

-25

-20

-15

-10

-5

CHARGE CURRENT = 150mA

BATTERY-VOLTAGE ERROR

vs. CHARGE CURRENT

CHARGE CURRENT (A)

BATTERY-VOLTAGE ERROR (%)

MAX8730 toc08

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

-0.25

-0.20

-0.15

-0.10

-0.05

4 CELLS

3 CELLS

BATTERY-VOLTAGE ERROR vs. VCTL

VCTL (V)

CHARGE-VOLTAGE ERROR (%)

MAX8730 toc09

0 1.50.5 1.0 2.0 2.5 3.0 3.5

-1.0

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

1.0

INPUT CURRENT-LIMIT ERROR vs. CLS

CLS

(V)

INPUT CURRENT-LIMIT ERROR (%)

MAX8730 toc01

1.1 1.6 2.1 2.6 3.1 3.6 4.1

-15

-10

-5

TYPICAL UNIT

MINIMUM

MAXIMUM

INPUT CURRENT-LIMIT ERROR

vs. SYSTEM CURRENT

SYSTEM CURRENT (A)

INPUT CURRENT-LIMIT ERROR (%)

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

= 17V

= 19V

= 24V

CLS

= V

REF

x 0.7

INPUT CURRENT-LIMIT ERROR

vs. SYSTEM CURRENT

SYSTEM CURRENT (A)

INPUT CURRENT-LIMIT ERROR (%)

MAX8730 toc03

012345

CLS

= V

REF

/ 2

CLS

= V

REF

x 0.7

CLS

= V

REF

IINP ERROR vs. V

CSSP

- V

CSSN

MAX8730 toc04

CSSP

- V

CSSN

IINP ERROR (%)

908070605040302010

-10

-5

-15

0 100

MINIMUM

MAXIMUM

CHARGE-CURRENT ERROR

vs. CHARGE-CURRENT SETTING

ICTL

(V)

CHARGE-CURRENT ERROR (%)

MAX8730 toc05

0 0.6 1.2 1.8 2.4 3.0 3.6

-20

-15

-10

-5

TYPICAL UNIT

MINIMUM ERROR

MAXIMUM ERROR

CHARGE-CURRENT ERROR

vs. BATTERY VOLTAGE

BATTERY VOLTAGE (V)

CHARGE-CURRENT ERROR (%)

MAX8730 toc06

051015 20

-0.5

-0.2

0.1

0.4

0.7

1.0

1.3

1.6

ICTL

= 2V

ICTL

= 3.6V

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 28 29

Low-Cost Battery Charger 1

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