#LoraLowPower# Use a power analyzer to evaluate the standby power consumption of a lora development board for reference!

cqhzq

#LoraLowPower# Use a power analyzer to evaluate the standby power consumption of a lora development board for reference! [Copy link]

 

#Lora low power consumption# Use a power analyzer to evaluate the standby power consumption of a lora development board. The low power consumption analysis when LCP=3s is as follows:
1. This test only tests the paging and sleep states of the lora module, which is usually referred to as the average current in the standby state;
2. A paging cycle is about 20ms, during which the maximum current is 20mA and the average power consumption is 8.73mA;
3. The real-time current in the sleep state is very small, about 2μA, which really saves power;
4. Maintaining a paging cycle of 3s, the average current after 30 minutes is microampere level, about 24μA.

cqhzq

Schematic diagram of the test scenario:

freebsder

What is this? Why is there only a description?

呵1呵2

The project is in need of an instrument to analyze power consumption. Where can I buy one?

dwdsp

Reminder: Can the phrase "2. A paging cycle is about 20ms" be understood as "2. A paging duration is about 20ms"?

szcqcc

dwdsp posted on 2020-10-14 05:56 Reminder: Can the "2. A paging cycle is about 20ms" in the text be understood as "2. A paging duration is about 20ms"

Haha, that's right.

cqhzq

dwdsp posted on 2020-10-14 05:56 Reminder: Can the "2. A paging cycle is about 20ms" in the text be understood as "2. A paging duration is about 20ms"

You are right, thank you!

cqhzq

freebsder posted on 2020-10-13 20:56 What is this? Why is there only a description?

Standby power consumption evaluation data of a lora development board.

cqhzq

Power consumption evaluation of a LORA temperature sensor

Test conditions:

1. Input voltage = 3.6V ;

2. Send temperature values to the LORA gateway every 5 minutes ;

Test results:

1. Idle power consumption = 3.4 μA

2. Time taken to send data = 40ms

3. Average power consumption when sending data = 51mA

4. Average power consumption for 5 minutes and 10 seconds = 11 μA

5. Average power consumption after 30 minutes of operation = 13 μA

Can we infer this? : 500mAh battery theoretical usage time: 3 years +

The power consumption evaluation current waveform is as follows:

cqhzq

cqhzq published on 2020-10-15 17:55 Test conditions for power consumption evaluation of a LORA temperature sensor: 1. Input voltage = 3.6V; 2. Send temperature value to L every 5 minutes ...

cqhzq

We insist on updating the evaluation data of different products every day: there are various low-power products based on Bluetooth/lora/NB/sensor/MCU and other technologies, covering Huawei/Xiaomi/Tesla... and other battery-powered series, for reference by software and hardware engineers and product engineers!

If you need more evaluation data, please leave your contact information!

hjl2832

This test algorithm is obviously not very accurate. The average current for wake-up reception and transmission is calculated as 51mA because your device has a sampling delay.

Even if according to your curve chart, the peak current is about 90mA and lasts for 50ms, no matter what, the actual average current must be greater than 51mA. The rising and falling edges of this curve are obviously caused by insufficient sampling speed.