Siemens HC15 Spécifications télécharger pdf (Page 39)

HC15 Hardware Interface Description

5.2 Operating Temperatures

HC15_HD_v01.000 Page 39 of 67 2007-1-19

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5.2 Operating Temperatures

The values stated below are in compliance with GSM recommendation TS 51.010-01.

Table 11 shows the temperatures for automatic shutdown as measured by the on-board measuring element

NTC. The maximum allowable ambient temperature that causes the module to shut down depends on various

conditions. The following tables Table 12 and Table 13 show sample lab environment conditions. Please be

aware that the operating duration and the maximum ambient temperature will vary significantly for your applica-

tion.

Note: Generally it is strongly recommended to implement additional measures to lead the heat out of the appli-

cation, especially at maximum transmission power levels of WCDMA (24dBm), e.g. use of ground area for a heat

sink or convection (see Section 6.1 for the ground area that may be used for a heat sink).

Table 11: Board temperature

Parameter Min Typ Max Unit

Operating temperature range -20 +25 +85 °C

Automatic shutdown

Temperature measured on HC15 board

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 --- >+85 °C

Table 12: Sample operating conditions without forced air circulation (according to IEC 60068-2)

Mode Ambient

Temperature

Voltage RF Power Operating

Duration

GSM,

GPRS/EDGE Class 8

+65°C V

BATT+

< 3.8V Max. ∞

WCDMA +55°C V

BATT+

< 3.4V < 10dBm ∞

WCDMA +65°C V

BATT+

< 3.4V < 0dBm ∞

GRPS/EDGE Class10 +65°C V

BATT+

< 3.8V Max. < 2min

WCDMA +65°C V

BATT+

< 3.8V Max. < 2min

Table 13: Sample operating conditions with forced air circulation (air speed 0.9m/s)

Mode Ambient

Temperature

Voltage RF Power Operating

Duration

GSM,

GPRS/EDGE Class 8

+75°C V

BATT+

< 3.8V Max. ∞

WCDMA +60°C V

BATT+

< 3.4V < 10dBm ∞

WCDMA +70°C V

BATT+

< 3.4V < 0dBm ∞

GRPS/EDGE Class 10 +65°C V

BATT+

< 3.8V Max. ∞

WCDMA +60°C V

BATT+

< 3.4V Max. ∞

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