ERICSSON EH238 TechDesAcc
Technical Description Accessories
Ericsson Handheld Telephone 1341-B
Vehicle Power Adaptor VP2000
Contents
Introduction
Main Features
Power Supply ____________ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __3
Charging______________ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __5
Specifications
Connectors and Signals
System Connector J1 ____________ __ __ __ __ __ __ __ __ __ __ __ __ __6
Power Connector J2 _______________________________________7
___________________________________________3
_________________________________________3
_________________________________________6
____________ ______________ ____6
Technical Description Accessories: VP2000
2
Introduction
The Vehicle Power Adaptor VP2000 is plugged into the 12 V cigarette lighter
outlet and provides power to the telephone at the same time as it charges the
telephone battery.
The Vehicle Power Adaptor consists of three parts; the plug which contains
the electronics, the coiled cord and the detachable connector part.
Technical Description Accessories: VP2000
Main Features
Power Supply
The logic in the telephone controls the power supply. The current values
needed by the telephone in different situations, for example in standby or in
transmission, are programmed and stored in the telephone.
The VP2000 delivers two current levels only, 700 mA and 30 mA. These levels are pulsed dur ing a 30 seconds perio d t o en ab l e an y av er ag e lev el to be
achieved.
Every 30 second period begins with a 700 mA pulse and ends with a 30 mA
pulse. The length of 700 mA pulse decides the average current.
3
Technical Description Accessories: VP2000
Examples:
Standby:
Transmission:
700 mA for 4 seconds gives 4s / 30s x 700 = 93 mA
700 mA for 25 seconds gives 25s / 30s x 700 = 583 mA
The battery of the telephone takes care of the redundant current during the
700 mA part and support with extra current during the 30 mA part. This means
a battery always has to be attached to the phone when it is connected to
the
Vehicle Power Adaptor
: To trickle-charge the battery the actual value of the current is set some
Note
mA higher than the current required.
.
4
Technical Description Accessories: VP2000
Charging
The batteries used are of the type nickel metal hydride, NiMH. There are
four contacts on the battery: plus, minus, T and K. The contact T is used for
the temperature sensor. K is not used.
When the telephone is connected to the charger and switched ON, the battery
condition is analyzed. If charging is decided, 700 mA is delivered constantly.
During the charging the voltage and the temperature increase and follow the
curve as shown in the figure below.
The battery vol tag e an d t he te mpe ra tur e ar e m easu re d ev er y se co nd . A mean
voltage value and a mean temperature value, are calculated every minute.
These minute values are compared according to the following methods:
Minus Delta V
•
Flat V
•
dT / dt
•
Maximum Peak Voltage
•
Maximum Time 2.5 h
•
After the main charging, the telephone automatically returns to normal power
supply and trickle charging as described above.
5
Technical Description Accessories: VP2000
Specifications
Dimensions (Connector) 50 x 23 x 20 mm
Dimensions (DC plug) 90 x 28 mm
Input Voltage 10.8 - 15.6 V DC
Cable Length 1.9 m (fully extended)
Ambient Temp. Chargin g
Charging Time: Light Battery < 1 h
Charging Time: Standard Battery approx. 1 h
Charging Time: Plus Battery < 2 h
Charging Time: High Capacity Battery approx. 2 h
Connectors and Signals
System Connector J1
+ 10°C to + 45°C
ATMS
1
2
7
8
14
PWRSRC
ICTRL
DGND
DCIN
Audio To Mobile Station (Not Used)
Power Source
Log."1": The phone is connected to an external power supply
Control for the power supp ly
Log."1": Supply 700 mA, Log."0": Supply 30 mA
Digital Ground
Supply to the telephone
6
Technical Description Accessories: VP2000
Power Connector J2
1
2
3
4
DGND
ICTRL
POWER
DCIN
Digital Ground
Control of the power supply
Log."1": Su pp ly 700 mA, Log."0": Su pp l y 30 mA
Indicates external power
Log."1": 3.0 - 16 V
The telephone is connected to an external power supply
DC voltage supply to the telephone
7
Technical Description Accessories: VP2000
8
Travel Charger TC2000
Contents
Introduction
Main Features
Power Supply ____________ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __3
Charging______________ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __5
Specifications
Connectors and Signals
System Connector J1 ____________ __ __ __ __ __ __ __ __ __ __ __ __ __6
Power Connector J2 _______________________________________7
___________________________________________3
_________________________________________3
_________________________________________6
____________ ______________ ____6
Technical Description Accessories: TC2000
2
Introduction
The Travel Charger TC2000 provides power to the telephone and charges the
attached battery. The charger is plugged directly into the mains outlet. A 2-meter cable with a detachable connector at the end, is connected to the system
connector of the telephone.
Technical Description Accessories: TC2000
Main Features
Power Supply
The logic in the telephone controls the power supply. The current values
needed by the telephone in different situations, for example in standby or in
transmission, are programmed and stored in the telephone.
The Travel Charge r delivers two current levels only, 700 mA and 30 mA.
These levels are puls ed d uri ng a 30 se co nd s pe ri o d t o en ab l e any avera ge
level to be achieved.
Every 30 seconds period begins with a 700 mA pulse and ends with 30 mA.
The length of 700 m A puls e de ci d es th e av erag e current.
3
Technical Description Accessories: TC2000
Examples:
Standby:
Transmission:
700 mA for 4 seconds gives 4s / 30s x 700 = 93 mA
700 mA for 25 seconds gives 25s / 30s x 700 = 583 mA
The battery of the telephone takes care of the redundant current during the
700 mA part and support with extra current during the 30 mA part. This means
a battery always has to be attached to the phone when it is connected to the
TC2000
Note
mA higher than the current required.
.
: To trickle-charge the battery the actual value of the current is set some
4
Technical Description Accessories: TC2000
Charging
The batteries used are of the type nickel metal hydride, NiMH. There are
four contacts on the battery: plus, minus, T and K. The contact T is used for
the temperature sensor. K is not used.
When the telephone is connected to the charger and switched ON, the battery
condition is analyzed. If charging is decided, 700 mA is delivered constantly.
During the charging the voltage and the temperature increase and follow the
curve as shown in the figure below.
The battery vol tag e an d t he te mpe ra tur e ar e m easu re d ev er y se co nd . A mean
voltage value and a mean temperature value, are calculated every minute.
These minute values are compared according to the following methods:
Minus Delta V
•
Flat V
•
dT / dt
•
Maximum Peak Voltage
•
Maximum Time 2.5 h
•
After the main charging the telephone automatically returns to normal power
supply and trickle charging, as described above.
5
Technical Description Accessories: TC2000
Specifications
Dimensions (AC/DC) 73 x 34 x 52/89 mm
Dimensions (Connector) 50 x 23 x 20 mm
Input Voltage Ericsson specified mains converter only
Cable Length 2 m
Ambient Temp. Chargin g
Charging Time: Light Battery < 1 h
Charging Time: Standard Battery approx. 1 h
Charging Time: Plus Battery < 2 h
Charging Time: High Capacity Battery approx. 2 h
Connectors and Signals
System Connector J1
+ 10°C to + 45°C
ATMS
1
2
7
8
14
PWRSRC
ICTRL
DGND
DCIN
Audio To Mobile Stati o n (n ot us ed )
Power Source
Log."1": The phone is connected to an external power supply
Control for the power supply.
Log."1": Su pp ly 700 mA, Log."0": Su pp l y 30 mA
Digital Ground
DC voltage supply to the phone
6
Technical Description Accessories: TC2000
Power Connector J2
1 DGND Digital Ground
2 ICTRL Control for the powe r su pp ly
Log."1": Supply 700 mA, Log."0": Supply 30 mA
3 POWER Indicates the external power
Log."1": 3.0 - 16 V
The phone is connected to an external power supply
4 DCIN DC voltage supply to the phone
7
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