NuPower
TM
S100A01 User Manual
Rev 1.0
9
4.5
TEMP FLAG
This signal is an output to indicate an over-temperature condition in the NuPower S100A01. A logic high
(+5 VDC) indicates normal operation, while a logic low (0 VDC) indicates an over-temperature condition.
The NuPower S100A01 incorporates internal logic circuitry that turns off the DC bias to the RF
amplifiers. See section 4.6 for details on thermal shutdown points.
Caution: The amplifier should be shut down and allowed to cool off when the over-
temperature flag is set low to avoid damage to the module.
Do not connect the Temperature Flag to DC Power (+28 Volts input). The Temperature Flag
can be used to monitor thermal status.
4.6
CURRENT TEMP
This signal is an output to indicate internal temperature of the S100A01. Temperature Flag (Section 4.5)
threshold is reached when internal temperature of approximately 85°C is exceeded and will re-enable
bias to internal RF amplifiers at approximately 70°C. See Figure 5 below for ‘current temp’ voltage and
corresponding internal temperature.
Figure 5. Current Temperature Output Voltage vs. Internal Temperature
200
250
300
350
400
450
500
550
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700
750
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850
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1000
1050
1100
-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85
Cu
rr
en
t T
emp
V
ol
ta
ge (
mV
)
Internal Temperature (°C)
Current Temp Voltage vs. Internal Temperature
Current Temp (mV)
