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Restrictions
· A battery which has completely run down can not be re-charged quickly because the
battery voltage is less than 3.0V and the logic which implements the charge control
cannot be operated at this low voltage level. In this case the battery is recharged via
trickle-charging. However, the charging symbol cannot be shown in the display
because at this time logic supply voltages are not operating. The charging time for this
trickle-charging (until the battery can be fast-charged from then on) is in the range of 1
hour. If, within this time, the battery voltage exceeds 3.2V, then the
ASIC
switches on the mobile and charging continues in the Charge-Only Mode. In
some circumstances it can happen that after trickle-charging and the usually initiated
switch-on procedure of the mobile, the supply voltage collapses so much that the
mobile phone switches off again. In this case trickle charging starts again with a now
raised threshold voltage of 3.75V instead of 3.2V, at maximum for 20 minutes. The
POWER SUPPLY ASIC
minutes overall).
·
Charging the battery will not be fully supported in case of using old accessory
(generation '45' or earlier). It is not recommended to use any cables that adapt "old" to
"new" Lumberg connector. Using such adapters with Marlin will have at least the
following impact:
1) half-sine wave chargers (e.g. P35 & home station) can not be used for trickle
charging
2) normal charging might be aborted before the battery is fully charged
3) EMC compliance can not be guaranteed
· A phone with a fully charged LiIon battery will not be charged immediately after switch-
on. Any input current would cause an increase of the battery voltage above the
maximum permissible value. As soon as the battery has been discharged to a level of
about 95% (due to current consumption while use), it will be re-charged in normal
charging mode.
· The phone cannot be operated without a battery.
· The phone will be destroyed if the battery is inserted with reversed polarity:
· Þ design-wise it is impossible to wrongly pole the phone. This is prevented by
mechanical means.
· Þ electrically, a correctly poled battery is presumed, i.e. correct polarity must be
guaranteed by suitable QA measures at the supplier
· The mobile phone might be destroyed by connecting an unsuitable charger:
· Þ a charger voltage >15V can destroy resistances or capacitors
· Þ a charger voltage >20V can destroy the switch transistor of the charging circuit
In case the transistor fails the ASIC will be destroyed. In the case of voltages lower
than 15V and an improper current limitation the battery might be permanently
damaged. A protection against grossly negligent use by the customer (e.g. direct
connection of the charge contact to the electricity supply in a motor car) is not
provided. Customer safety will not be affected by this restriction.
V 1.0
SL55
will retry switching on the phone up to 3 times (within 60
Page 37of 52
Company Confidential © Copyright Siemens AG
Customer Care
POWER SUPPLY
ICM MP CCQ GRM
06/03
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