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Visitor II
June 24, 2014
Question

VL6180X: What is the power consumption of this device ?

  • June 24, 2014
  • 1 reply
  • 797 views
Posted on June 24, 2014 at 09:54

Dear,

What is the power consumption of VL6180X ?

Regards.

A.

#proximity-sensor #vl6180x
    This topic has been closed for replies.

    1 reply

    Visitor II
    June 24, 2014
    Posted on June 24, 2014 at 19:18

    The current consumption for the VL6180X is dependent on how it is used in the application.

    The ranging measurement current consumption of the VL6180X in an application is dependent on the target distance, target reflectance, and sampling rate.  An application measuring a target at 50mm with a reflectance of 17% sampling at 10Hz will draw an average 1.7mA.  The average current consumption will be reduced to 0.17mA in the sample rate is reduced to 1Hz.

    Mode

    Current

    Conditions

    Hardware Standby

    <1uA

    Shutdown (GPIO0 = 0) No I2C

    Software Standby

    <1uA

    After boot and device ready

    ALS

    300uA

    During integration

    Ranging

    1.7mA1

    Average consumption

    1. 10Hz sampling rate, 17% reflective target at 50mm

    In addition, the VL6180X has a feature to reduce the current consumption when there is no target.  The Early Convergence Estimate (ECE) will stop a measurement in 0.5ms if there is not enough returned signal.  This feature greatly reduces the current consumption.  The table below shows average current consumption under various conditions and show the effectiveness of the ECE.

    Range Inter-measurement period(1)

    Register setting

    (0x001B)

    Period

    (ms)

    ECE = 1.05

    ECE = OFF

    No Tgt

     (mA)

    No Tgt (mA)

    Tgt @ 50mm (mA)

    Tgt @ 100mm (mA)

    0xC8

    2000

    0.03

    0.53

    0.08

    0.15

    0x96

    1500

    0.04

    0.72

    0.11

    0.2

    0x64

    1000

    0.05

    1.09

    0.18

    0.3

    0x4B

    750

    0.07

    1.42

    0.22

    0.4

    0x32

    500

    0.09

    2.19

    0.33

    0.59

    0x19

    250

    0.18

    4.20

    0.62

    1.42

    0x0A

    100

    0.42

    9.85

    1.45

    3.32

    0x05

    50

    0.77

    18.08

    2.59

    5.63

    (1) Max Convergence time = 50ms

    The ALS feature consumes an average of 300uA while integrating.  The table below shows average current consumption under various sampling and integration times.

    Period

     

    (ms)

    Int 50

     

    (mA)

    Int 100

     

    (mA)

    Int 150

     

    (mA)

    Int 200

     

    (mA)

    2000

    0.02

    0.02

    0.03

    0.04

    1500

    0.02

    0.03

    0.04

    0.05

    1000

    0.02

    0.04

    0.05

    0.07

    750

    0.03

    0.05

    0.07

    0.09

    500

    0.05

    0.07

    0.10

    0.13

    250

    0.08

    0.14

    0.20

    0.25

    100

    0.17

    0.30

    -

    -

    50

    0.29

    -

    -

    -