Rainbow-electronics MAX8730 Manual do Utilizador descarregar pdf (Página 17)

MAX8730

Low-Cost Battery Charger

______________________________________________________________________________________ 17

MAX8730

A = 20V/V

CSSN

CSSP

CURRENT-SENSE

AMPLIFIER

CURRENT-SENSE

AMPLIFIER

GM =

2.8µA/mV

IINP

INPON

REF

SYSTEM OVER-

CURRENT

CLS

GMS

CCS

A = 15V/V

CSIN

CSIP

CCI

GMI

ICTL

65mV

CHARGER

SHUTDOWN

CELL-

SELECT

LOGIC

BATT

MODE

REF

SELECTOR

(DEFAULT = 4.2V)

VCTL

GMV

CCV

LOWEST

VOLTAGE

CLAMP

222mA

LVC

6.56A

VCTL + 40mV

DHI

HIGH-

SIDE

DRIVER

SRC

DHIV

OVP

IMIN

IMAX

CCMP

DC-DC

CONVERTER

5.4V

CHARGER

REGULATOR

SRC

LDO

REFERENCE

4.2V

REF

CHARGER

BIAS

LOGIC

BATT

ADAPTER

DETECT

REFERENCE

3.3V

REFON

SRC

SWREF

REF/2

GND ACINACOK

CSI

-5V

REGULATOR

SRC - 10V

GND

REL_EN

SRC

ASNS

PDS

PDL

LOGIC

PDS

BATT

PDL

SRC

RELTH

CSSP

6µA

REL_EN

Figure 2. Functional Diagram

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 28 29

Low-Cost Battery Charger 1

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