Power consumption in advertising mode

AN4494

10

Power consumption in advertising mode

10.1

Test case specification identifier

CURRENT_TEST

10.2

Test prerequisite

In order to perform this test the platform must be provided with the test points in series with

the Vbat1, 2, 3 pins (see Table 1: "Test points").

10.3

Test description

The aim of this test is to verify that the BlueNRG current consumption profile during the

advertising is aligned with the simulated value (using the BlueNRG Current Consumption

Estimation Tool available on ST BlueNRG website www.st.com/bluenrg).

10.4

Test setup

10.4.1

Hardware

Agilent N6705B power analyzer or an oscilloscope.

10.4.2

Software

ST BlueNRG GUI.

10.5

Test procedure

Connect the power analyzer in series to the Vbat pins in the BlueNRG. If it is not available,

use a 10 Ohm resistor to sense the current, connecting two probes to it.

Power up the BlueNRG platform.

Set the BlueNRG in advertising mode, using these commands with the BlueNRG GUI:

BLUEHCI_GATT_INIT

HCI_LE_SET_ADVERTISING_PARAMETERS(interval_min=interval_max=0x0640)

HCI_LE_ADVERTISING_DATA (Data_length 0, Advertising_Data=0x101010…)

HCI_LE_SET_ADVERTISE_ENABLE (Avertising_Enable=0x01)

BLUEHCI_HAL_SET_TX_POWER_LEVEL (PA_Level = 5/4)

Capture the current waveform.

10.6

Expected results

The average current should be as reported here (see Figure 9: "Typical current profile

during an advertising event"):

Avg. current = approx. 6 mA

Sleep current = approx. 2 µA (see Section 11: "Reference" point )

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