AN1857 Freescale Semiconductor / Motorola, AN1857 Datasheet - Page 24
![no-image](/images/no-image-200.jpg)
AN1857
Manufacturer Part Number
AN1857
Description
A 3-Phase ac Induction Motor Control System Based on the MC68HC908MR32
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN1857.pdf
(52 pages)
- Current page: 24 of 52
- Download datasheet (425Kb)
Application Note
Temperature
Sensing
24
It is a good idea to keep track of the temperature of the power module.
The circuit shown in
used to monitor temperature. A silicon diode has a temperature
coefficient of approximately –2.2 mV /degree Centigrade. The forward
bias voltage of a silicon diode is approximately 0.6 volts. Therefore, the
circuit shown in
and decrease at a slope of approximately –8.8 mV/degree Centigrade.
Using this information, it is apparent that the temperature of the power
module can be monitored easily for over- temperature conditions. The
output of this temperature sensing circuit is connected to an analog
optoisolation circuit. From the analog optoisolation circuit’s output, it is
connected to the control board’s Temp_sense input and routed to the
MR32’s A/D (analog-to-digital) converter input.
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 15. Temperature Sensing Circuit Schematic
Go to: www.freescale.com
BAV99LT1
D13
Figure 15
TEMPERATURE SENSING
Figure 15
will output approximately 2.4 volts at 25 C
BAV99LT1
D14
is a schematic of the temperature circuit
2.21 k – 1%
100 nF
C301
R302
GNDA
+3.3V_A
Temp_sense
MOTOROLA
AN1857
Related parts for AN1857
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![AN177](/images/no-image3.png)
Part Number:
Description:
An Overview og the Phase Locked Loop
Manufacturer:
Philips
Datasheet:
![AN1268](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
AN OVERVIEW OF THE LPC FLASH INTERFACE
Manufacturer:
STMicroelectronics
![AN1315](/images/no-image3.png)
Part Number:
Description:
An Evaluation System Interfacing the MPX2000 Series Pressure Sensors to a Microprocessor
Manufacturer:
Motorola / Freescale Semiconductor
![AN1998](/images/no-image3.png)
Part Number:
Description:
An FM-IF system for DECT and other high speed GFSK applications
Manufacturer:
Philips Semiconductors / NXP Semiconductors
![AN2124](/images/no-image3.png)
Part Number:
Description:
An 8 x 8 Discrete Cosine Transform on the StarCore SC140/SC1400 Cores
Manufacturer:
Freescale Semiconductor / Motorola
![AN2428](/images/no-image3.png)
Part Number:
Description:
An Overview of the HCS12 ATD Module
Manufacturer:
Freescale Semiconductor / Motorola
![AN2708](/images/no-image3.png)
Part Number:
Description:
An Introduction to the External Bus Interface on the HCS12X
Manufacturer:
Freescale Semiconductor / Motorola
![AN2783](/images/no-image3.png)
Part Number:
Description:
An RF Data Link Using Tango3 and Romeo2 RF Modules
Manufacturer:
Freescale Semiconductor / Motorola
![MC33394DH](/images/manufacturer_photos/0/2/262/freescale_semiconductor_tmb.jpg)
Part Number:
Description:
IC POWER SUPPLY MULT-OUT 44-HSOP
Manufacturer:
Freescale Semiconductor
Datasheet:
![MC33394DWB](/images/manufacturer_photos/0/2/262/freescale_semiconductor_tmb.jpg)
Part Number:
Description:
IC POWER SUPPLY MULT-OUT 54-SOIC
Manufacturer:
Freescale Semiconductor
Datasheet:
![MSC7110](/images/no-image3.png)
Part Number:
Description:
Low-Cost 16-Bit DSP with DDR Controller
Manufacturer:
Freescale Semiconductor / Motorola
![MSC7116](/images/no-image3.png)
Part Number:
Description:
Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC
Manufacturer:
Freescale Semiconductor / Motorola
Datasheet:
![MSC7119](/images/no-image3.png)
Part Number:
Description:
Low-Cost 16-bit DSP with DDR Controller and 10/100 Mbps Ethernet MAC
Manufacturer:
Freescale Semiconductor / Motorola
Datasheet:
![MSC7118](/images/no-image3.png)
Part Number:
Description:
Low-Cost 16-bit DSP with DDR Controller
Manufacturer:
Freescale Semiconductor / Motorola
Datasheet:
![MSC8101](/images/no-image3.png)
Part Number:
Description:
Functional Pin Difference Between the MSC8101 and MPC8260 Communications Processor Modules
Manufacturer:
Freescale Semiconductor / Motorola