Rainbow-electronics MAX1870A Manual do Utilizador descarregar pdf (Página 17)

MAX1870A

Step-Up/Step-Down

Li+ Battery Charger

______________________________________________________________________________________ 17

MAX1870A

CSSN

CSSP

CSSS

CLS

CCS

ICTL

CCI

CSIP

CSIN

CCV

BATT

CELLS

VCTL

A = 18V/V

CSS

CURRENT-

SENSE

AMPLIFIERS

3.6V

(6.7A FOR 30mΩ)

IMAX1

INPUT-CURRENT BLOCK

GMS

IINP ASNS

0.81mV

(1.5A FOR 30mΩ)

50mV

REFIN

400mV

REFIN

GMI

A = 18V/V

CSI

22.5mV

(42mA ON

30mΩ)

(6.7A FOR 30mΩ)

3.6V

IZX

IMAX2

CHARGE-CURRENT BLOCK

+ 4.0V

4.2V

GMV

REF

CELL-

SELECT

LOGIC

BATTERY-VOLTAGE BLOCK

SHUTDOWN LOGIC

5.4V LINEAR

REGULATOR

4.096V

REFERENCE

DCIN

LDO

REF REFIN

1/55

CHG

RDY

ICTL

23% OF

REFIN

GND

PGND

DLOV

VHN

DHI

VHP

DBST

SHDN

LEVEL

SHIFT

STEP-UP/DOWN

CURRENT-MODE

STATE MACHINE

IMAX1

LVC IMIN

0.15V

LVC

LOW-

SIDE

DRIVER

HIGH-

SIDE

DRIVER

Figure 3. Functional Diagram

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 31 32

MAX1870A 1
Step-Up/Step-Down 1
Li+ Battery Charger 1
Package Information 31

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