phyCORE-OMAP44xx
6
©
PHYTEC Messtechnik GmbH
2012
L-760e_1
Precisely because of their compact dimensions and high level of integration, these controllers are subjected to
elevated thermal loads. Their design does not permit continuous operation over many years when all internal
units are working at 100%.
The total period during which a controller can operate reliably depends on the thermal load. The term used for
this period is POH (power-on hours). It refers to the (minimum) service life.
The POH value of a controller varies according to its use. The tables show an analysis of typical consumer
applications (smartphone). For these scenarios the lifetimes are 5 years and 7 years.
The POH value depends to a high degree on how the different cores of the controller are used. There is no simple
formula for calculating POH values.
However, it is important to pay close attention to POH and plan your use of the controller in accordance with the
technical conditions.
We will assist you in this and show you how to successfully use controllers of this kind in your industrial
applications.
We can optimize software so that it automatically adjusts the clock frequency and voltage to the processing
requirements of the application. In addition, we can send your typical application to Texas Instruments for
calculation of the POH value for your particular scenario. The more accurate your description in terms of
duration and use pattern, the more reliable the results of this calculation.
We will be glad to answer any questions. Please contact our sales team.
Generic Example (operating time 5 years)
1
23
45
The above power on hour use case is based on a 5 year lifetime use profile for smartphones and other mobile
devices. Other use cases can apply for other devices in other fields and for a lifetime up to 5 years.
1.
For other use cases, contact TI for evaluation to determine if they can be supported.
2.
T
J
is the average operating junction temperature.
3.
See the operating condition addendum for values.
4.
With SmartReflex™ enabled.
5.
The power on hour (POH) analysis is based on a typical use case with the following parameters:
- The percentage (%) of activity by day for each application of the use case
- The MPU, IVA and CORE voltages and frequencies by application (ideally the use of vdd_mpu, vdd_iva_audio, or vdd_core OPPs)
- The average operating junction temperature
- SmartReflex™ (power optimization techniques) use or not
