beautypg.com

Max1870a step-up/step-down li+ battery charger – Rainbow Electronics MAX1870A User Manual

Page 15

background image

MAX1870A

Step-Up/Step-Down

Li+ Battery Charger

______________________________________________________________________________________

15

23

4

7

6

VHP

VHN

CSSP

CSSN

DHI

DBST

CSIP

CSIN

BATT

DLOV

LDO

BLKP

CSSS

16

28

26

31

29

27

22

DCIN

REF

CELLS

CLS

PGND

32

18

17

25

1

3

REFIN

9

VCTL

11

ICTL

12

ASNS

10

IINP

14

CCV

5

15

2

13

SYSTEM LOAD

C8
22µF

C9
44µF

C7
1µF

RS2
30mΩ

L1

10

µ

H

C11
1µF

C12
1µF

M2

M1

19

N

P

RS1b
30mΩ

GND

CCS

CCI

30

RS1a

30mΩ

R6

33Ω

C5

1µF

C1

1µF

2.2µF

2.2µF

D3

D4

R4
OPEN

R3

SHORT

R9

OPEN

R10

OPEN

R1

SHORT

R12
OPEN

LDO

R7

10kΩ

R5

10kΩ

C6
0.01µF

C3

0.01µF

C4
0.01µF

C2

0.01µF

SHDN

AC

ADAPTER

+

-

D1

D2

OPTIONAL

MAX1870A

OPTIONAL REVERSE-

ADAPTER PROTECTION

Figure 2. Stand-Alone Typical Application Circuit