MC75i Hardware Interface Description
3.5 Charging Control
71
MC75i_HD_v01.100a
Page 43 of 122
2009-08-13
Confidential / Released
3.5.4
Batteries Tested for Use with MC75i
When you choose a battery for your MC75i application you can take advantage of one of the
following two batteries offered by VARTA Microbattery GmbH. Both batteries meet all require-
ments listed above. They have been thoroughly tested by Cinterion Wireless Modules and
proved to be suited for MC75i.
•
LIP 653450 TC, 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.
•
PLF 503759C.PCM, type PoLiFlex® Lithium Polymer
This battery has been especially designed by VARTA for use with electronic applications
like mobile phones, PDAs, MP3 players, security and telematic devices. It has almost the
same properties as the above Li-Ion battery. It is type Polymer, is smaller, lighter and comes
without casing.
Specifications, construction drawings and sales contacts for both VARTA batteries can be
found in
Table 10:
Specifications of battery packs suited for use with
MC75i
Battery type
Rechargeable Lithium Ion or Lithium Polymer battery
Nominal voltage
3.6V / 3.7V
Capacity
> 500mAh
NTC
10k
± 5% @ 25°C
approx. 5k
@ 45°C
approx. 26.2k
@ 0°C
B value range: B (25/85)=3423K to B =3435K ± 3%
Overcharge detection voltage
4.325 ± 0.025V
Deep discharge detection voltage
2.4V
Deep discharge release voltage
2.6V
Overcurrent detection
3 ± 0.5A
Overcurrent detection delay time
4 ~ 16ms
Short detection delay time
50µs
Internal resistance
<130m
Note: A maximum internal resistance of 150m
should not be
exceeded even after 500 cycles and under extreme condi-
tions.
