STPMC1 Datasheet, PDF (1/77 Pages) STMicroelectronics – Programmable poly-phase energy calculator IC

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
■ Supports Rogowski coil, current transformer,
Shunt or Hall current sensors
■ Exclusive ripple-free energy calculation
algorithm
■ Programmable pulsed output
■ Stepper motor outputs
■ Neutral current, temperature, and magnetic
field monitoring
■ OTP memory for configuration and calibration
■ SPI interface
■ Supports IEC 62052-11 / 62053-21 / 62053-23
standards
■ Less than 0.1 % error over 1:1000 dynamic
range
Applications
■ Power metering
Description
The STPMC1 device functions as an energy
calculator and is an ASSP designed for effective
energy measurement in power line systems
utilizing Rogowski, current transformer, Shunt or
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
STPMC1BTR
- 40 to 85 °C
TSSOP20
meter. It can be coupled with a microprocessor for
multi-function energy meters, or it can directly
drive a stepper motor for a simple active energy
meter. The calculator has five input data pins. The
first three receive the voltage and current
information of the phases. In fact, each data input
processes two ΔΣ signals, multiplexed in time and
generated by the STPMSx device. The fourth
input receives multiplexed ΔΣ signals also, and
can be used to sense the neutral current or
another signal - temperature, for example. The
fifth input data pin accepts non-multiplexed ΔΣ
signals and it can be used for sensing the
magnetic field information from a Hall sensor.
Four internal hard-wired DSP (digital signal
processing) units perform all the computations on
the ΔΣ streams in real time by means of ΔΣ
arithmetic blocks. This allows the achievement of
very high computation precision with fast and
efficient digital architecture. All the data recorded
by the STPMC1 are accessible through an SPI
port, which is also used to configure and calibrate
the device. The configuration and calibration data
can be saved in a 112-bit OTP block, or
dynamically set in microprocessor-based meters.
Package
TSSOP20 (tape and reel)
Packaging
2500 parts per reel
April 2012
This is information on a product in full production.
Doc ID 15728 Rev 6
1/77
www.st.com
77