TC65 Hardware Interface Description
Strictly confidential / Draft
s
TC65_HD_V00.521
Page 38 of 99
24.05.2005
Table 3: Specifications of battery packs suitable for use with TC65
Battery type
Rechargeable Lithium Ion or Lithium Polymer battery
Nominal voltage
3.6V / 3.7V
Capacity
Recommended: 1000mAh to 1200mAh
Minimum: 500mAh
NTC 10k
Ω
± 5% @ 25°C
approx. 5k
Ω
@ 45°C
approx. 26.2k
Ω
@ 0°C
B value range: B (25/85)=3423K to B =3435K ± 3%
Overcharge detection voltage
4.325 ± 0.025V
Overdischarge detection voltage
2.5 ± 0.05V
Overcurrent detection
3 ± 0.5A
Overcurrent detection delay time
4 ~ 16ms
Short detection delay time
50µs
Internal resistance
<130m
Ω
Note: A maximum internal resistance of 150m
Ω
should not
be exceeded even after 500 cycles and under extreme
conditions.
3.5.4
Batteries Recommended for Use with TC65
When you choose a battery for your TC65 application you can take advantage of one of the
following two batteries offered by VARTA Microbattery GmbH. Both batteries meet all
requirements listed above. They have been thoroughly tested by Siemens, proved to be
suited for TC65, and are CE approved.
•
LIP 633450A1B PCM.STB, type Lithium Ion
This battery is listed in the standard product range of VARTA. It is incorporated in a
shrink sleeve and has been chosen for integration into the reference setup submitted for
Type Approval of Siemens GSM modules.
•
LPP 503759CA PCM.NTC.LT50, type Lithium Polymer
This battery has been especially designed by VARTA for use with Siemens GSM
modules. It has the same properties as the above Li-Ion battery, except that it is type
Polymer, is smaller and comes without casing.
Specifications, construction drawings and sales contacts for both VARTA batteries can be
found in Section 9.3.