BL BL0937

BL0937 is a wide-range, single-phase, multi-function energy metering IC, suitable for applications such as single-phase socket meters, single-phase power strips, and smart home appliance control circuits, offering high cost-effectiveness.

BL0937 integrates two high-precision Sigma-Delta ADCs, along with analog circuit modules including a voltage reference and power management, as well as a DSP circuit for processing electrical parameters such as active power and RMS current/voltage values. It provides a high-frequency CF1 output for indicating RMS current/voltage values, and a high-frequency CF output for energy metering.

BL0937 is capable of measuring single-phase active energy, active power, RMS current/voltage values, and other parameters, fully meeting the requirements of socket meters, single-phase power strips, smart home appliances, and related applications.

BL0937 features a patented anti-creep design, working in conjunction with a well-designed external hardware implementation.

• High accuracy: nonlinearity measurement error less than ±0.5% within input dynamic range of 2500:1
• Large-signal stability: CF output jitter less than ±0.2% at 300mA sampling current
• Small-signal stability: CF jitter less than ±0.3% at 50mA sampling current
• On-chip RMS output for voltage and current; current measurement range (4mA~30A) @1mohm
• Anti-creep design ensures noise power cutoff with no current present
• On-chip power supply monitoring circuit for brownout detection; chip enters reset state when supply voltage drops below 2.7V
• On-chip 1.2V reference voltage
• On-chip oscillator circuit, clock approximately 2MHz
• Single supply 3.3V operation, low power consumption 6mW (typical)
• SOP8 package

• Single-phase socket meter
• Single-phase power strip
• Smart home appliance control circuit
• Energy measurement for smart home applications