User's Manual

AC65/AC75 Hardware Interface Description
Confidential / Preliminary
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AC65/AC75_hd_v00.372 Page 83 of 118 2006-08-03
5.2 Operating Temperatures
Table 21: Board temperature
Parameter Min Typ Max Unit
Operating temperature range -30 +85 °C
Automatic shutdown
5
Temperature measured on AC65/AC75 board
Temperature measured at battery NTC
-30
-20
---
---
+90
+60
°C
Table 22: Ambient temperature according to IEC 60068-2 (without forced air circulation)
Parameter Min Typ Max Unit
Operating temperature range -30 +25 +75 °C
Restricted operation
6
--- +75 to
+85
°C
Table 23: Charging temperature
Parameter Min Typ Max Unit
Battery temperature for software controlled fast charging
(measured at battery NTC)
0 --- +45 °C
Note:
• See Chapter 3.3.4 for further information about the NTCs for on-board and battery
temperature measurement, automatic thermal shutdown and alert messages.
• When data are transmitted over EGPRS or GPRS the AC65/AC75 automatically reverts
to a lower Multislot Class if the temperature increases to the limit specified for normal
operation and, vice versa, returns to the higher Multislot Class if the temperature is back
to normal. For details see Chapter 3.4 “Automatic EGPRS/GPRS Multislot Class
Change”.
5
Due to temperature measurement uncertainty, a tolerance on the stated shutdown thresholds may occur. The
possible deviation is in the range of ± 3°C at the overtemperature limit and ± 5°C at the undertemperature limit.
6
Restricted operation allows normal mode speech calls or data transmission for limited time until automatic
thermal shutdown takes effect. The duration of emergency calls is unlimited because automatic thermal
shutdown is deferred until hang up.