Difference between revisions of "PandaBoard Power Measurements"

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(Reference Materials)
(Parts)
 
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** [http://youtu.be/J8_V1TbSpBs Video]
 
** [http://youtu.be/J8_V1TbSpBs Video]
 
** [[media:danders-power-measurement.pdf|Slides]]
 
** [[media:danders-power-measurement.pdf|Slides]]
 +
 +
== Parts ==
 +
* INA219 - I2C based power measurement IC
 +
** Standalone device and does not require an ADC for sampling
 +
** does voltage measurements
 +
** only needs an I2C interface for data transmission
 +
** [http://www.digikey.com/product-detail/en/INA219AIDCNR/296-23770-1-ND/1952550 Digikey product page]
 +
** [http://www.ti.com/product/ina219 TI product page]
 +
* INA199A2 - x100 OPAMP
 +
** requires the use of an ADC for sampling
 +
** recommend using an Atmel AVR or TI MSP430
 +
** [http://www.ti.com/product/ina199a2 Datasheet]
 +
** [http://search.digikey.com/us/en/products/INA199A2DCKR/296-27331-1-ND/2279292 Digikey product page]
 +
* Shunt Resistor
 +
** 0603 package size
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** 0.05 Ohm resistance
 +
** [http://search.digikey.com/us/en/products/ERJ-L03KJ50MV/P50NJCT-ND/570940 Digikey product page]
  
 
== Power Rails for PandaBoard ==
 
== Power Rails for PandaBoard ==
  
* VCORE1    - L18
+
{|border=1
* VCORE2    - L21
+
!Name
* VCORE3     - L13
+
!Function
* VIO_1.8V   - L16
+
!Inductor
* MEM_1.29V  - L11
+
!Comment
* VMEM       - L22
+
|-
 +
|VCORE1
 +
|VDD_MPU
 +
|L18
 +
|
 +
|-
 +
|VCORE2
 +
|VDD_IVA
 +
|L21
 +
|
 +
|-
 +
|VCORE3
 +
|VDD_CORE
 +
|L23
 +
|
 +
|-
 +
|V1V8
 +
|VIO_1.8V
 +
|L16
 +
|
 +
|-
 +
|V2V1
 +
|VDD_V2V1
 +
|L8
 +
|Used for secondary power rails
 +
|-
 +
|V1V29
 +
|VDD_V1V29
 +
|L11
 +
|Used for memory interface
 +
|-
 +
|VMEM
 +
|VDD_VMEM
 +
|L22
 +
|
 +
|}
 +
<br>
 +
 
 +
 
 +
[[file:pandaboard-inductors.jpg|400px]]
 +
 
 +
== Power Rails for PandaBoard ES Rev B1 (Latest)==
 +
 
 +
{|border=1
 +
!Name
 +
!Function
 +
!Inductor
 +
!Comment
 +
|-
 +
|VCORE1
 +
|VDD_MPU
 +
|L22
 +
|
 +
|-
 +
|VCORE2
 +
|VDD_IVA
 +
|L17
 +
|
 +
|-
 +
|VCORE3
 +
|VDD_CORE
 +
|L15
 +
|
 +
|-
 +
|V1V8
 +
|VIO_1.8V
 +
|L13
 +
|
 +
|-
 +
|V2V1
 +
|VDD_V2V1
 +
|L7
 +
|Used for secondary power rails
 +
|-
 +
|V1V29
 +
|VDD_V1V29
 +
|L10
 +
|Used for memory interface
 +
|-
 +
|VMEM
 +
|VDD_VMEM
 +
|N/C
 +
|Not used on PandaBoard-ES
 +
|}
 +
<br>
 +
 
 +
[[file:pandaboard-es-inductors.jpg|400px]]
 +
 
 +
'''NOTE:''' L22 is on the back side of the PandaBoard-ES
 +
 
 +
[[file:pandaboard-es-inductors-back.jpg|400px]]

Latest revision as of 16:37, 13 July 2012

Reference Materials

Parts

  • INA219 - I2C based power measurement IC
  • INA199A2 - x100 OPAMP
  • Shunt Resistor

Power Rails for PandaBoard

Name Function Inductor Comment
VCORE1 VDD_MPU L18
VCORE2 VDD_IVA L21
VCORE3 VDD_CORE L23
V1V8 VIO_1.8V L16
V2V1 VDD_V2V1 L8 Used for secondary power rails
V1V29 VDD_V1V29 L11 Used for memory interface
VMEM VDD_VMEM L22



Pandaboard-inductors.jpg

Power Rails for PandaBoard ES Rev B1 (Latest)

Name Function Inductor Comment
VCORE1 VDD_MPU L22
VCORE2 VDD_IVA L17
VCORE3 VDD_CORE L15
V1V8 VIO_1.8V L13
V2V1 VDD_V2V1 L7 Used for secondary power rails
V1V29 VDD_V1V29 L10 Used for memory interface
VMEM VDD_VMEM N/C Not used on PandaBoard-ES


Pandaboard-es-inductors.jpg

NOTE: L22 is on the back side of the PandaBoard-ES

Pandaboard-es-inductors-back.jpg