Rainbow-electronics MAX1874 Manual do Utilizador descarregar pdf (Página 13)

MAX1874

Dual-Input, USB/AC Adapter, 1-Cell

Li+ Charger with OVP and Thermal Regulation

______________________________________________________________________________________ 13

MAX1874

USB INPUT

DC INPUT

UP TO 6.0V

4.7µF

10V CERAMIC

4.7µF

6.3V CERAMIC

2.2µF

10V CERAMIC

2.2µF

6.3V CERAMIC

0.1µF

10V CERAMIC

TO REF

DCLV

GND

BATT

NTC

THERMISTOR

10kΩ AT +25°C

PON

REF

THRM

USB

400mΩ

250mΩ

Li+

CELL

USEL

500mA

100mA

DCI

PGND

BYP

REGULATOR

UOK

CHG

DCOK

100kΩ

301kΩ

10kΩ

Figure 2. A Minimal Circuit that Assumes System Load Is Only Connected to the Battery. The circuit has a 6.5V maximum input and

disables charging for inputs over 6.2V.

MAX1874

USB INPUT

0VP UP TO 18V

CHARGING UP TO 6.0V

4.7µF

25V CERAMIC

4.7µF

6.3V CERAMIC

2.2µF

10V CERAMIC

2.2µF

6.3V CERAMIC

0.1µF

10V CERAMIC

TO REF

DCLV

GND

BATT

NTC

THERMISTOR

10kΩ AT +25°C

PON

REF

THRM

USB

400mΩ

250mΩ

Li+

CELL

USEL

500mA

100mA

DCI

PGND

BYP

REGULATOR

UOK

CHG

1µF

10V CERAMIC

DCOK

10kΩ

1kΩ

FDN302

0.055Ω, -20V

Figure 3. A circuit with overvoltage protection MOSFET (Q2) on DC input withstands up to 18V from the AC adapter and disables

charging at inputs over 6.2V.

1 2 ... 8 9 10 11 12 13 14 15 16

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX1874 Manual do Utilizador Página 13

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAX1874