BL0930E

The BL0930E IC is the core metering chip for electronic energy meters. Its design employs oversampling and digital signal processing technology, significantly improving measurement accuracy. All data following A/D conversion is processed and computed by digital circuitry, ensuring long-term stability. Electronic energy meters based on this chip feature simple peripheral circuitry, high accuracy, and excellent stability, making them suitable for single-phase two-wire electricity metering applications. The BL0930E measures both forward and reverse active power, and can convert reverse active power into pulse outputs consistent in direction with forward active power, while providing a reverse power consumption indication on Pin12. As a result, electronic energy meters built with the BL0930E offer strong anti-tampering capability. The BL0930E provides two pulse outputs at different frequencies. Pin14 outputs high-frequency pulses for calibration and computer data processing, while Pin15 and Pin16 output a set of lower-frequency pulses for directly driving a stepper motor to drive the mechanical register for energy accumulation. The BL0930E gives full consideration to the differing requirements of creep prevention and startup performance in energy meters. A carefully designed digital anti-creep threshold is employed to ensure reliable creep prevention while keeping the startup current well below standard requirements.

Key features

• High accuracy: nonlinearity measurement error less than 0.1% over the input dynamic range (3000:1)
• High stability during meter calibration: output frequency fluctuation less than 0.1%
• Accurate measurement of active power in both positive and negative directions, with energy calculated in the same direction
• Slow output pulses for direct motor drive; fast output pulses for computer data processing
• Anti-tamper function: logic output pin REVP indicates reverse or incorrect power consumption
• On-chip voltage detection circuit for power-loss monitoring
• Anti-creep function
• On-chip reference voltage 2.42V ±8% (typical temperature coefficient 30ppm/°C); external voltage reference also supported
• On-chip crystal oscillator clock (built-in crystal oscillator)
• Single supply voltage: 5V
• Low power consumption: 15mW (typical)
• 0.35µm CMOS process for improved batch consistency and product reliability