STEVAL-IHP001V3 STMicroelectronics, STEVAL-IHP001V3 Datasheet

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Features ■ Active, reactive, apparent energies and RMS values ■ Ripple free active energy pulsed output ■ Live and neutral monitoring for tamper detection ■ Easy and fast digital calibration in only one point over the whole current range ■ ...

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Contents Contents 1 Schematic diagram 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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STPM01 8.12.1 8.13 Resetting the STPM01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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STPM01 List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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Schematic diagram 1 Schematic diagram Figure 1. Block diagram 6/60 Doc ID 10853 Rev 7 STPM01 ...

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STPM01 2 Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Pin n° Symbol Type 1 MON MOP SCS OUT DDD 5 V GND SS 6 ...

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Maximum ratings 3 Maximum ratings Absolute maximum ratings (see Note:) Table 3. Symbol V DC Input voltage CC I Current on any pin (sink/source) PIN Input voltage at digital pins (SCS, MOP, MON, SYN, SDATD SCLNLC, LED) V ...

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STPM01 4 Functions Table 5. Programmable pin functions Programmable pin (APL register MON Output for Stepper’s node (MB) MOP Output for Stepper’s node (MA) If APL=2 then LED provides high frequency pulses proportional to Active Energy with 50% ...

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Functions Table 6. Internal signal description Symbol Name ZCR Zero crossing signal AW Active energy RW Reactive energy SW Apparent energy LIN Line frequency signal BFR Base frequency range MA Stepper motor signals MB BIT Tamper flag BIL No load ...

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STPM01 5 Electrical characteristics °C, 100 between and V , 100 between V SS Table 7. Electrical characteristics Symbol Parameter Energy measurement ...

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Electrical characteristics Table 7. Electrical characteristics (continued) Symbol Parameter Current injection latch-up I LATCH immunity Analog Inputs ( IP1 IN1 IP2 IN2 V Maximum input signal levels MAX f A/D Converter bandwidth ADC f ...

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STPM01 Table 7. Electrical characteristics (continued) Symbol Parameter R External resistor P C External capacitors P f Nominal output frequency CLK Figure RC oscillator (see circuit I Settling current CLKIN R Settling resistor SET t Frequency jitter JIT On chip ...

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Terminology 6 Terminology 6.1 Measurement error The error associated with the energy measurement made by the STPM01 is defined as: Percentage error = [STPM01 (reading) - true energy] / true energy 6.2 ADC offset error This is the error due ...

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STPM01 7 Typical performance characteristics Figure 3. Supply current vs. supply voltage °C A Figure 5. RC oscillator: frequency jitter vs. temperature Figure 7. Digital voltage regulator: line - load regulation Typical performance characteristics Figure 4. RC ...

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Typical performance characteristics Figure 9. Power supply AC rejection vs. V Figure 11. Error over dynamic range gain dependence Figure 13. Gain response of ΔΣ AD converters 16/60 Figure 10. Power supply DC rejection vs Figure 12. Primary ...

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STPM01 8 Theory of operation 8.1 General operation description The STPM01 is able to perform active, reactive and apparent energy measurements, RMS and instantaneous values for voltage and current, line frequency information. Most of the functions are fully programmable using ...

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Theory of operation The maximum differential input voltage is dependent on the selected gain according to the following table. Table 8. Gain of voltage and current channels Voltage channels Gain 4 The gain register is included in the device configuration ...

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STPM01 ∑Δ A/D converters 8.3 The analog to digital conversion in the STPM01 is carried out using two first order ∑ Δ converters. The device performs A/D conversions of analog signals on two independent channels in parallel. The current channel ...

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Theory of operation Figure 15. ZCR signal 8.5 Period and line voltage measurement The period module measures the period of the base frequency of the voltage channel and checks if the voltage signal frequency is within the f LIN signal ...

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STPM01 Figure 16. LIN and BFR signal The BFR flag is also set if the register value of the RMS voltage drops below 64. BFR is cleared when the register value goes above 128. The BFR, then, also gives information ...

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Theory of operation for tampering purposes or in case the line voltage is very stable possible to use a predefined value for computing the energy without sensing it. In order to enable the SWM mode, the STPM01 must ...

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STPM01 capacitor should be connected between V these capacitors must be located very close to the device. The STPM01 contains a power on reset (POR) detection circuit. If the V than 2.5 V then the STPM01 goes into an inactive ...

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Theory of operation When a no load condition occurs (BIL=1) the integration of power is suspended and the tamper module is disabled. In standalone mode load condition is detected, the BIL signal blocks generation of pulses for ...

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STPM01 The tamper circuit works if the energies associated with the two current channels are both positive or negative, if the two energies have different sign, the tamper is on all the time however, the channel with the associated higher ...

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Theory of operation samples, called B and A respectively, the criteria of tamper is calculated and the channel with higher current is selected, resulting in a new tamper state. If four consecutive new results of criteria happen, i.e. after elapsed ...

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STPM01 the nominal frequency value of CLKOUT. Two nominal frequency ranges are expected, from 4.000 MHz to 4.194 MHz (MDIV = 0) or from 8.000 MHz to 8.192 MHz (MDIV = 1). Figure 20. Different oscillator circuits (a): with quartz; ...

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Theory of operation 8.13 Resetting the STPM01 The STPM01 has no reset pin. The device is automatically reset by the POR circuit when the V crosses the 2.5 V value but it can be reset also through the SPI interface ...

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STPM01 In a practical example where APL = 2, and the desired P is 64000 pulses/kWh (= 17.7 Hz*kW), we have 7.63*10 This means that the reading of 0x00001 in the active energy register represents 7.63 ...

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Theory of operation Figure 21. Positive energy stepper driving signals Figure 22. Negative energy stepper driving signals When a no-load condition is detected MOP and MON are held low. 8.16 Using STPM01 in microcontroller based meter (peripheral) The higher flexibility ...

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STPM01 It is expected that an application microcontroller should access the data in the metering device on regular basis at least 1/s (recommended is 32/s). Every latching of results in the metering device requested from the microcontroller also resets the ...

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Theory of operation Table 15. Status bit description Bit # Name Description 0 BIL No load condition ∑ Δ signals status 1 BCF 2 BFR Line frequency range 3 BIT Tamper condition 4 MUX Current channel selection 5 LIN Trend ...

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STPM01 The first 6 registers are read-only except for the 8 bit mode signals in the DFP register (the mode signals will be described later in this paragraph). The last two registers CFL and CFH can be also written because ...

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Theory of operation The very first CFG bit, called TSTD, is used to disable any change of system signals after it was permanently set. During the configuration phase, each bit set to logic level 1 will increase the supply current ...

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STPM01 Table 16. Configuration bits map (continued) Address n. of Name 6-bit bits DEC binary 000101 5 000110 6 PST 3 (1) 000111 7 001000 8 FRS 1 001001 9 MSBF 1 001010 10 FUND 1 001011 11 1 001100 ...

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Theory of operation Table 16. Configuration bits map (continued) Address n. of Name 6-bit bits DEC binary 010000 16 2 (1) 010001 17 010010 18 BGTC 2 (1) 010011 19 010100 20 010101 21 CPH 4 010110 22 (1) 010111 ...

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STPM01 Table 16. Configuration bits map (continued) Address n. of Name 6-bit bits DEC binary 110000 48 CRC 2 (1) 110001 49 110010 50 NOM 2 (1) 110011 51 110100 52 ADDG 1 110101 53 CRIT 1 110110 54 LVS ...

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Theory of operation Table 17. Mode signals description Signal Bit Bit # name value 0 0 BANK Used for RC startup procedure 1 0 MOP and MON operates normally 1 PUMP MOP and MON provides the driving signals to implement ...

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STPM01 – BANK used to activate RC oscillator (see 8.21 SPI interface The SPI interface supports a simple serial protocol, which is implemented in order to enable a communication between some master system (microcontroller or PC) and the ...

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Theory of operation 8.21.1 Remote reset The timing diagram of the operation is shown on the short as 30 ns. The internal reset signal is named RRR. Unlike the POR, the RRR signal does not cause the 30 ms retard ...

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STPM01 division makes sense with the MSB of data value because the MSN of it holds the parity code rather than useful data. Figure 25. Data records reconstruction The sequence of data record during the reading operation is fixed. Normally, ...

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Theory of operation → Latching phase. Interval value > 2 → Data latched, SPI idle. Interval value > → Enable SPI for read operation. Interval ...

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STPM01 → → data value is placed in SDA SDA value is stable and shifted into the device 4 → → ...

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Theory of operation 1. activate SYN first in order to latch the results; 2. after at least 1µs activate SCS; 3. write one byte to the transmitter of SPI (this will produce 8 pulses on SCL with SDI=1); 4. deactivate ...

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STPM01 Equation 3 ω i( • sin ( t + where I is the peak current, between voltage and current. 8.24.1 Active power Figure 28. Active energy computation diagram In the STPM01, after the pre-conditioning and the A/D ...

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Theory of operation Equation 6 dv/dt → v( i(t) → ∫ = ⋅ [see Figure Now four signals are available. Combining (pairing) them by means ...

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STPM01 Equation 11 ∫ = ⋅ Equation 12 [ ∫ ′ = ⋅ The signals process flow will be the same as ...

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Theory of operation Equation ⋅ The reactive power will present then a ripple at twice the line frequency. Since the average value of a sinusoid is ...

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STPM01 Equation RMS 2 The RMS voltage value is obtained as: Equation ∫ RMS T 0 For the apparent power another value is produced: Equation ∫ ′ ...

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STPM01 calibration 9 STPM01 calibration Energy meters based on STPM01 device are calibrated in a fast and easy way. The calibration is essentially based on the single calibration of the voltage and current channel considering their RMS values rather than ...

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STPM01 As shown in Table certain error. Voltage ADC amplification Av is constant, while Ai is chosen according to used sensors. The calibration algorithm will firstly calculate the voltage divider ratio and, as final result, the correction parameters, called Kv ...

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STPM01 calibration V DIV Choosing R2 = 500 Ω (connected between V V and V ) value is obtained: LINE IP Indicating with I A current, and with X calculated, the final values for calibrators can be calculated as: If ...

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STPM01 10 Application Design The choice of the external components in the transduction section of the application is a crucial point in the application design, affecting the precision and the resolution of the whole system. Among the several considerations, a ...

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Application Design Figure 29. STPM01 reference schematic with one current transformer and one shunt 54/60 Doc ID 10853 Rev 7 STPM01 ...

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STPM01 Figure 30. STPM01 with 3X charge pump DC-DC converter Doc ID 10853 Rev 7 Application Design 55/60 ...

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Package mechanical data 11 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available ...

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STPM01 Dim. Min 0.05 A2 0.8 b 0.19 c 0.09 D 6.4 E 6 0° PIN 1 IDENTIFICATION 1 TSSOP20 mechanical data mm. Typ. Max. 1.2 0.15 1 ...

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Package mechanical data Tape & reel TSSOP20 mechanical data Dim. Min 12 6.8 Bo 6.9 Ko 1.7 Po 3.9 P 11.9 58/60 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 22.4 ...

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STPM01 12 Revision history Table 22. Document revision history Date Revision 28-Sep-2004 1 22-Dec-2005 2 24-Oct-2006 3 06-Feb-2006 4 12-Jan-2009 5 03-Apr-2009 6 19-Oct-2010 7 Preliminary data. Document updated. The chapter 9 updated. Modified Figure 11. Modified address 11 Table ...

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