BL0921

BL0921 Single Phase Energy Meter IC with Integrated Oscillator FEATURES High accuracy, less than 0.1% error over a dynamic range of 500: 1 On-chip oscillator as clock source Exactly measure the real power in the positive orientation and negative orientation, calculate the energy in the same orientation Two current monitors continuously monitor the phase and neutral currents in two-wire distribution systems. Uses the larger of two currents to bill, even during a Fault condition A PGA in the current channel allows using small value shunt and burden resistance The low frequency outputs F1 and F2 can directly drive electromechanical counters and two phase stepper motors and the high frequency output CF, supplies instantaneous real power, is intended for calibration and communications Two logic outputs REVP and FAULT can be used to indicate a potential orientation or Fault condition On-Chip power supply detector On-Chip anti-creep protection On-Chip voltage reference of 2.5V±8% Single 5V supply Low static power (typical value of 25mW). The technology of SLiM (Smart–Low–current– Management) is used. Credible work, working time is more than twenty years Interrelated patents are pending DESCRIPTION The BL0921 is a low cost, high accuracy, high stability, simple peripheral circuit electrical energy meter IC. The meter based on the BL0921 is intended for using in single-phase, two-wire distribution systems. It can exactly measure the real power in the positive orientation and negati...