XT65/XT75 Hardware Interface Overview
6.2 Operating Temperatures
s
XT65_XT75_HO_v00.130
Page 30 of 67
2006-10-12
Confidential / Preliminary
6.2
Operating Temperatures
Table 12:
Board temperature
Parameter
Min
Typ
Max
Unit
Automatic shutdown
1
Temperature measured on XT65/XT75 board
Temperature measured at battery NTC
1.
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 undertem-
perature limit.
-30
-20
---
---
>+80
+60
°C
Table 13:
Ambient temperature according to IEC 60068-2 (without forced air circulation)
Parameter
Min
Typ
Max
Unit
Operating temperature range
-30
+25
+65
°C
Restricted operation (with VBATT
≤
3,8V)
+70
°C
Restricted operation
1
1.
Restricted operation allows normal mode speech calls or data transmission for limited time until automatic
thermal shutdown takes effect. For operating the XT75/65 above an expected ambient temperatures of
75°C please contact Siemens Application Engineering. The duration of emergency calls is unlimited be-
cause automatic thermal shutdown is deferred until hang up.
---
+70 to
+85
°C
Table 14:
Charging temperature
Parameter
Min
Typ
Max
Unit
Battery temperature for software controlled fast charging
(measured at battery NTC)
0
---
+45
°C