Benewake TF-Luna - Ultra-low Power Mode

SJ-PM-TF-Luna A05 Product Manual
Benewake (Beijing) Co. Ltd.
Page17
The user can change TF-Luna's luminous duty cycle in two ways. The first is to use the command
trigger mode. TF-Luna does not emit light when it does not receive a ranging command. At this time,
the power consumption is about 42.5mW (5V power supply). The actual power consumption is
determined by the frequency of the command trigger. Another way is to enable the low power
consumption mode provided by TF-Luna. The internal working mechanism of this mode is the same as
the command trigger mode, except that the trigger signal is automatically generated internally by
TF-Luna. The user can set the TF-Luna to enter the low-power mode through the "Enable/disable
Power saving mode (ECO) ID_LOW_CONSUMPTION=0x35" instruction.
To ensure the internal working sequence of TF-Luna, the maximum output frequency of low power
consumption mode is 10Hz. The following table lists the reference values of the average power
consumption at different operating frequencies in the low power mode when the power supply is 5V.
The actual power consumption may be affected by the ambient temperature or the supply voltage, and
may differ from the reference value.
Power saving frequency
Avg current(mA)
Avg power (mW)
1Hz
8.85
44.25
2Hz
9.2
46
3Hz
9.55
47.75
4Hz
9.9
49.5
5Hz
10.25
51.25
6Hz
10.6
53
7Hz
10.95
54.75
8Hz
11.3
56.5
9Hz
11.65
58.25
10Hz
12
60
6.11 Ultra-low Power Mode
In order to further reduce power consumption, TF-Luna offers an Ultra-low Power Mode. In this
mode, MCU enters sleep mode, and the standby power consumption of TF-Luna is about 1.5mW at this
time. However, when MCU sleeps, it is not able to automatically awake as Low Power Mode is activated.
Therefore, we need to change the voltage of Pin 2 to wake it up.