Key facts
- Brand
- Belling
- Model
- BL0937
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 3
- Languages
- ZH
- Last added
- 2026-10-17
Start here
Belling BL0937 Smart Socket Metering Chip Application Guide
The Belling BL0937 is a dedicated chip developed for energy measurement in the smart home field. It features a small SOP8 package, simple peripheral circuits, and low cost. The chip measures a range of 5mA to 20A (1W to 2500W) with a power consumption of 1.7mA and a signal response time of less than 300ms. It operates at a working voltage of 3.3V with a drop protection of 2.7V±50mV. This manual is written in Chinese.
Read onlineBelling BL0937 specifications
| Measurement Range | 5mA~20A (1W~2500W) |
|---|---|
| Power Consumption | 1.7mA |
| Signal Response Time | <300ms |
| Working Voltage | 3.3V |
| Package Type | SOP8 |
Source: Belling BL0937 Smart Socket Metering Chip Application Guide
All Belling BL0937 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the working voltage of the BL0937?
The working voltage is 3.3V, with a drop protection of 2.7V±50mV.
From: Belling BL0937 Smart Socket Metering Chip Application Guide
How is the chip calibrated?
It is recommended to use a single-point calibration method by applying rated voltage, current, and power to measure the corresponding pulse frequencies and calculate conversion coefficients.
From: Belling BL0937 Smart Socket Metering Chip Application Guide
How should the BL0937 be calibrated?
Use a single‑point calibration: apply a rated voltage and current, measure the corresponding CF, CF1 and P pulse frequencies, then compute voltage, current and power conversion coefficients (Ku, Ki, Kp) for use in the system software.
From: Belling BL0937 Smart Socket Metering Chip Application Guide
What does the CF1 pin output?
CF1 provides an active‑power high‑frequency pulse with a fixed 38 µs width; its frequency is proportional to the measured power, and it also indicates over‑current with a 6.78 kHz pulse.
From: Belling BL0937 Smart Socket Metering Chip Application Guide
What supply voltage range does the BL0937 require?
The chip operates with VDD between 3.0 V and 3.6 V.
From: Belling BL0937 Single-Phase Socket Metering Chip Datasheet
How is over‑current indicated by the BL0937?
When an over‑current condition occurs, the CF pin outputs a 6.78 kHz pulse.
From: Belling BL0937 Single-Phase Socket Metering Chip Datasheet