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MAX1908

Low-Cost Multichemistry Battery Chargers

Maxim Integrated 

MAX1908/MAX8724/MAX8765/MAX8765A

Low-Cost Multichemistry Battery Chargers

AC ADAPTER

INPUT

8.5V TO 28V

P1

R11

15kΩ

R12

12kΩ

Typical Application Circuits (continued)

RS1

0.01Ω

0.01µF 0.01µF

TO EXTERNAL

LOAD

C1

2 × 10µF

R6

59kΩ

1%

LDO

R14

10.5kΩ

1%

R15

8.25kΩ

1%

R16

8.25kΩ

1%

FROM HOST µP

(SHUTDOWN)

R7

19.6kΩ

1%

D2

C5

1µF

LDO

CSSP

ACOK

DCIN

VCTL

CSSN

CELLS

LDO

REFIN

BST

DLOV

ICTL

16.8V OUTPUT VOLTAGE

2.5A CHARGE LIMIT

ACIN

DHI

R19

10kΩ

N 1%

R20

10kΩ

1%

C12

1.5nF

SHDN

ICHG

IINP

CCV

MAX1908

MAX8724

MAX8765

MAX8765A

LX

DLO

PGND

CSIP

R5

1kΩ

C11

0.1µF

C9

0.01µF

CCI

CCS

C10

0.01µF

REF

CSIN

BATT

GND

CLS

C12

R17

1µF

19.1kΩ

1%

REFIN (4 CELLS SELECT)

C13

1µF

D3

R13

33Ω

C15

0.1µF

C16

1µF

N1a

N1b

L1

10µH

RS2

0.015Ω

BATT+

C4

BATTERY

22µF

THM

BATT-

PGND GND

R18

22kΩ

1%

4A INPUT CURRENT LIMIT

Figure 2. Typical Application Circuit with Fixed Charging Parameters

16

Maxim Integrated

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