Download GR 47 / GR 48 Technical Description

GR47/GR48 Technical description
3.4
Regulated Power Supply
Pins
Name
Description
1, 3, 5, 7, 9
VCC
Regulated Power Supply
The regulated power supply, VCC, is connected to the pin numbers 1,
3, 5, 7 and 9.
3.4.1 Power Supply (VCC)
The VCC supplies the module with external power. Any other voltage
needed is generated internally.
Parameter
Mode
Limit
Voltage to be applied
Nominal
3.6 Volts
Tolerance including ripple
3.4 Volts - 4.0 Volts
1
Over voltages
Current Drive capability at TX Full Power
5.5 Volts
< 600 mA (average))
< 2 A (Peak)
GR 47/48 have not internal capacitance to supply the large current
peaks during GSM transmission. Therefore on burst transmission the
application DC source is responsible for providing the appropriate
current.
Design application notes are available from customer support on
request.
3.4.2 Battery Charging Input (CHG_IN)
The battery charging pin is design to provide a charging current into a
battery. The precise algorithm is TBD but it will be one of the
following
•
•
1
Generic charging algorithm implemented and further
refinements for the algorithm to be implemented through
embedded applications (see section 6)
Specific charging algorithms for SEM approved batteries.
Measured at system connector pins.
GBBA/SEM/BMS 03:0001 Rev A
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