Rainbow-electronics MAX1873 Manual do Utilizador descarregar pdf (Página 7)

MAX1873

Simple Current-Limited Switch-Mode

Li+ Charger Controller

_______________________________________________________________________________________ 7

100

MAX1873S (3-CELL)

EFFICIENCY vs. INPUT VOLTAGE

MAX1873 toc07

INPUT VOLTAGE (V)

EFFICIENCY (%)

12 2016 24 28

BATT

= 10.5V

CHG

= 3A

100

16 2018 22 24 26 28

MAX1873T (4-CELL)

EFFICIENCY vs. INPUT VOLTAGE

MAX1873 toc08

INPUT VOLTAGE (V)

EFFICIENCY (%)

BATT

= 14V

CHG

+ 3A

1.0

0.5

2.0

1.5

2.5

3.0

0 1.0 1.50.5 2.0 2.5 3.0

CHARGING CURRENT

vs. SYSTEM LOAD CURRENT

MAX1873 toc10

SYSTEM LOAD CURRENT (A)

CHARGING CURRENT (A)

0507525 100 125 150

4-CELL BATTERY VOLTAGE AND

CHARGING CURRENT vs. TIME

MAX1873 toc09

TIME (MINUTES)

BATTERY VOLTAGE (V)

BATTERY VOLTAGE

CHARGING CURRENT

CHARGING CURRENT (A)

1.0

0.5

2.0

1.5

3.0

2.5

3.5

Typical Operating Characteristics (continued)

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 18V, V

ICHG/EN

= V

REF

, V

VADJ

= V

REF

/2. MAX1873R: V

BATT

= V

CSB

= 8.4V;

MAX1873S: V

BATT

= V

CSB

= 12.6V; MAX1873T: V

BATT

= V

CSB

= 16.8V; T

= +25°C, unless otherwise noted).

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Li+ Charger Controller 1

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