Rainbow-electronics MAX1870A Instrukcja Użytkownika Pobierz pdf (Strona 1)

General Description

The MAX1870A step-up/step-down multichemistry bat-

tery charger charges with battery voltages above and

below the adapter voltage. This highly integrated

charger requires a minimum number of external compo-

nents. The MAX1870A uses a proprietary step-up/step-

down control scheme that provides efficient charging.

Analog inputs control charge current and voltage, and

can be programmed by the host or hardwired.

The MAX1870A accurately charges two to four lithium-

ion (Li+) series cells at greater than 4A. A programma-

ble input current limit is included, which avoids

overloading the AC adapter when supplying the load

and the battery charger simultaneously. This reduces

the maximum adapter current, which reduces cost. The

MAX1870A provides analog outputs to monitor the cur-

rent drawn from the AC adapter and charge current. A

digital output indicates the presence of an AC adapter.

When the adapter is removed, the MAX1870A con-

sumes less than 1µA from the battery.

The MAX1870A is available in a 32-pin thin QFN (5mm

x 5mm) package and is specified over the -40°C to

+85°C extended temperature range. The MAX1870A

evaluation kit (MAX1870AEVKIT) is available to help

reduce design time.

Applications

Notebook and Subnotebook Computers

Hand-Held Terminals

Features

♦ Patented Step-Up/Step-Down Control Scheme*

♦ ±0.5% Charge-Voltage Accuracy

♦ ±9% Charge-Current Accuracy

♦ ±8% Input Current-Limit Accuracy

♦ Programmable Maximum Battery Charge Current

♦ Analog Inputs Control Charge Current, Charge

Voltage, and Input Current Limit

♦ Analog Output Indicates Adapter Current

♦ Input Voltage from 8V to 28V

♦ Battery Voltage from 0 to 17.6V

♦ Charges Li+ or NiCd/NiMH Batteries

♦ Tiny 32-Pin Thin QFN (5mm x 5mm) Package

MAX1870A

Step-Up/Step-Down

Li+ Battery Charger

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX1870A

REFIN

DCIN

CSSP

CSSN

DHI

DBST

CSIP

CSIN

BATT

SHDN

ASNS

VCTL

IINP

PGND

SYSTEM

LOAD

GND

ICTL

CLS

CELLS

FROM WALL ADAPTER

CSSS

VHN

VHP

BLKP

REF

LDO

DLOV

Typical Operating Circuit

19-3243; Rev 0; 4/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Pin Configuration appears at end of data sheet.

PART TEMP RANGE PIN-PACKAGE

MAX1870AETJ

-40°C to +85°C 32 Thin QFN

*Protected by U.S. Patent No. 6,087,816.

1 2 3 4 5 6 ... 31 32

Podsumowanie treści

Strona 1 - Li+ Battery Charger

General DescriptionThe MAX1870A step-up/step-down multichemistry bat-tery charger charges with battery voltages above andbelow the adapter voltage. Th

Strona 2

MAX1870AStep-Up/Step-Down Li+ Battery Charger10 ______________________________________________________________________________________Typical Operatin

Strona 3

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 11Typical Operatin

Strona 4

MAX1870AStep-Up/Step-Down Li+ Battery Charger12 ______________________________________________________________________________________Typical Operatin

Strona 5

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 13Pin Description

Strona 6

MAX1870AStep-Up/Step-Down Li+ Battery Charger14 ______________________________________________________________________________________MAX1870A234VHPVH

Strona 7

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 1523476VHPVHNCSSPC

Strona 8

MAX1870AStep-Up/Step-Down Li+ Battery Charger16 ______________________________________________________________________________________Detailed Descrip

Strona 9

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 17MAX1870ACSSNCSSP

Strona 10

MAX1870AStep-Up/Step-Down Li+ Battery Charger18 ______________________________________________________________________________________The input source

Strona 11

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 19• Continuous out

Strona 12

MAX1870AStep-Up/Step-Down Li+ Battery Charger2 _______________________________________________________________________________________ABSOLUTE MAXIMUM

Strona 13

MAX1870AStep-Up/Step-Down Li+ Battery Charger20 ______________________________________________________________________________________up operation. Du

Strona 14

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 21STATE BSTATE APR

Strona 15

MAX1870AStep-Up/Step-Down Li+ Battery Charger22 ______________________________________________________________________________________point, LVC, to t

Strona 16

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 23effectively cut

Strona 17

MAX1870AStep-Up/Step-Down Li+ Battery Charger24 ______________________________________________________________________________________Setting the LTF

Strona 18

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 25loop (CCS) is in

Strona 19

MAX1870AStep-Up/Step-Down Li+ Battery Charger26 ______________________________________________________________________________________LDO provides a 5

Strona 20

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 27MOSFET Power Dis

Strona 21

MAX1870AStep-Up/Step-Down Li+ Battery Charger28 ______________________________________________________________________________________CON) are preferr

Strona 22

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 29Layout And Bypas

Strona 23

MAX1870AStep-Up/Step-Down Li+ Battery Charger_______________________________________________________________________________________ 3PARAMETER CONDIT

Strona 24

MAX1870AStep-Up/Step-Down Li+ Battery Charger30 ______________________________________________________________________________________3231302928272691

Strona 25

MAX1870AStep-Up/Step-Down Li+ Battery Charger______________________________________________________________________________________ 31Package Informat

Strona 26

Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outl

Strona 27

MAX1870AStep-Up/Step-Down Li+ Battery Charger4 _______________________________________________________________________________________PARAMETER CONDIT

Strona 28

MAX1870AStep-Up/Step-Down Li+ Battery Charger_______________________________________________________________________________________ 5PARAMETER CONDIT

Strona 29

MAX1870AStep-Up/Step-Down Li+ Battery Charger6 _______________________________________________________________________________________PARAMETER CONDIT

Strona 30

MAX1870AStep-Up/Step-Down Li+ Battery Charger_______________________________________________________________________________________ 7PARAMETER CONDIT

Strona 31 - Package Information

MAX1870AStep-Up/Step-Down Li+ Battery Charger8 _______________________________________________________________________________________PARAMETER CONDIT

Strona 32

MAX1870AStep-Up/Step-Down Li+ Battery Charger_______________________________________________________________________________________ 9BATTERY INSERTIO

Komentarze do niniejszej Instrukcji

Brak uwag

Rainbow-electronics MAX1870A Instrukcja Użytkownika Strona 1

Przeglądaj online lub pobierz Instrukcja Użytkownika dla Czujniki Rainbow-electronics MAX1870A. Rainbow Electronics MAX1870A User Manual Instrukcja obsługi

Podsumowanie treści

Komentarze do niniejszej Instrukcji

Rainbow-electronics MAX1870A Instrukcja Użytkownika Strona 1

Przeglądaj online lub pobierz Instrukcja Użytkownika dla Czujniki Rainbow-electronics MAX1870A. Rainbow Electronics MAX1870A User Manual Instrukcja obsługi

Podsumowanie treści

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Czujniki Rainbow-electronics MAX1870A