Specifications

2.3.3 Block Diagram Battery management flow chart explanation
Java Box Power supply Input power 6-30 VDC, the input power pass via poly fuse and over voltage and
reverse polarity protection. The DC/DC reduce the power to 5V, the 5V supply for two separate
direction,
A. First direction to Linear power supply that reduce the power to 3.8V, this power supply will hold
the unit power on regular base
B. Second direction to battery charger, the battery charger supply the LIPO battery the correct
power management, battery selected 960ma/H max size 38*39*6.1mm with internal
management card, on normal operation the battery will be charge to maximum 4.1V, the battery
is use for backup and supply the power to the modem only when the main power fail or when
the modem turn off the DC/DC power supply.
The Java Box automatically will switch from linear power supply to battery operation when the DC/DC
power supply stops 5V output.
2.3.4 Battery charger
Battery charger on normal operation the battery will be charge to maximum 4.1V, the battery is use
for backup and supply the power to the modem only when the main power fail or when the modem
turn off the DC/DC power supply.
Charge condition Description LD1- Green LD2- Red
Charge in progress
When the device is in Pre-Charge or fast- Charge
status
ON OFF
Charge done
When the charging current goes lower than the
IENDTH
OFF ON
Stand By mode When the input voltage goes under VBAT - 50mV OFF OFF
Bad battery
temperature
When the voltage on the TH pin is out of the
programmable window, in accordance with the NTC
ON ON
Battery absent When the battery pack is removed ON ON
Over time When Battery did not charge fully on the given time ON ON
Table 3: Status LEDs Indications
Java Box Terminal Hardware Interface Description
Released