Wavecom G2 Especificações descarregar pdf (Página 47)

Wireless CPU

Q24 Series

Interfaces

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WM_PGM_Q24NG_PTS_001-005

November 20, 2007

3.14

Battery Charging Interface

.1 Hardware Description

Caution:

The battery int o owcharging erface does n t all

the Wireless CP plied and is

only used to charge a battery connected to VBATT.

Battery cha ugh switching transistor connecting the VBATT

signal to the Charger (CHG_IN signal).

The switching transistor is controlled by

algorithms.

hree types of battery technologies:

The algorithm controls the frequency and the connected time of switching transistor

During the charging procedure, battery charging level is controlled.

to be sup

rging is p ed thro aerform

the operating system with two kinds of

Equivalent circuit

The Wireless CPU

Q24 Series supports t

• Ni-Cd (Nickel-Cadmium), which is charged with the algorithm 0

• Ni-Mh (Nickel-Métal Hydrure), which is charged with the algorithm 0

• Li-Ion (Lithium-Ion), which is charged with the algorithm 1

(T).

To select the algorithm:

• AT+WBCM=4,0# Ni-Cd/Ni-Mh (by default)

• AT+WBCM=4,1#Li-Ion

• AT+WBCM=4,2#To know which algorithm is used

BAT_TEMP

Q24 Series

CHG_IN

Charger contro r lle

5K6

Cha

detection

rger

VBATT

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