STPMC1 Programmable poly-phase energy calculator IC Datasheet production data Features Supports 1-, 2- or 3-phase WYE and Delta services, from 2 to 4 wires Computes cumulative active and reactive wide- band and fundamental harmonic energies Computes active and reactive energies, RMS and momentary voltage and current values for each phase TSSOP20 Supports Rogowski coil, current transformer, Shunt or Hall current sensors Exclusive ripple-free energy calculation meter. It can be coupled with a microprocessor for algorithm multi-function energy meters, or it can directly Programmable pulsed output drive a stepper motor for a simple active energy Stepper motor outputs meter. The calculator has five input data pins. The first three receive the voltage and current Neutral current, temperature, and magnetic information of the phases. In fact, each data input field monitoring processes two signals, multiplexed in time and OTP memory for configuration and calibration generated by the STPMSx device. The fourth SPI interface input receives multiplexed signals also, and can be used to sense the neutral current or Supports IEC 62052-11 / 62053-21 / 62053-23 another signal - temperature, for example. The standards fifth input data pin accepts non-multiplexed Less than 0.1 % error over 1:1000 dynamic signals and it can be used for sensing the range magnetic field information from a Hall sensor. Four internal hard-wired DSP (digital signal Applications processing) units perform all the computations on the streams in real time by means of Power metering arithmetic blocks. This allows the achievement of very high computation precision with fast and efficient digital architecture. All the data recorded Description by the STPMC1 are accessible through an SPI The STPMC1 device functions as an energy port, which is also used to configure and calibrate calculator and is an ASSP designed for effective the device. The configuration and calibration data energy measurement in power line systems can be saved in a 112-bit OTP block, or utilizing Rogowski, current transformer, Shunt or dynamically set in microprocessor-based meters. Hall current sensors. Used in combination with one or more STPMSx ICs, it implements all the functions needed in a 1-, 2- or 3-phase energy Table 1. Device summary Order code Temperature range Package Packaging STPMC1BTR - 40 to 85 C TSSOP20 (tape and reel) 2500 parts per reel November 2012 Doc ID 15728 Rev 7 1/77 This is information on a product in full production. www.st.com 77Contents STPMC1 Contents 1 Functional block diagram . 5 2 Pin configuration . 6 3 Maximum ratings 8 4 Functions 9 5 Application 10 6 Electrical characteristics 12 7 Terminology . 14 7.1 Measurement error 14 7.2 Conventions . 14 7.3 Notation 14 8 Typical performance characteristics . 16 9 Theory of operation 18 9.1 General operation . 18 9.2 Power supply 20 9.3 Resetting the STPMC1 (status bit HLT) 21 9.4 Clock generator (bits MDIV, FR1, HSA) 21 9.5 Zero crossing detection (signal ZCR) 22 9.6 Period and line voltage measurement (status bits: LIN, BFR, LOW, BFF) 23 9.7 Single wire operation mode: SWM (status bits: NAH, BFR, configuration bit FRS) 24 9.8 Load monitoring (status bit BIL, configuration bit LTCH) . 26 9.9 Error detection (status bits: BCF, PIN) . 27 9.10 Tamper detection module (status bits: BCS, BSF, BIF, configuration bit ENH) . 27 9.10.1 Sum of currents is above tamper threshold (status bit BCS) . 28 9.10.2 Phase sequence is wrong (status bit BSF) 31 9.10.3 Phase active powers do not have the same sign (status bit BIF) . 31 2/77 Doc ID 15728 Rev 7