|
|
PDF 78M6618 Data sheet ( Hoja de datos )
| Número de pieza | 78M6618 | |
| Descripción | Octal Power and Energy Measurement IC | |
| Fabricantes | TERIDIAN Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de 78M6618 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
Simplifying System IntegrationTM
DS_6618_005
78M6618www.DataSheet4U.com
Octal Power and
Energy Measurement IC
DATA SHEET
June 2010
DESCRIPTION
FEATURES
The Teridian 78M6618 is a highly integrated IC for
independent monitoring and measurement of up to eight (8)
single-phase AC outlets. With multiple host interface options,
an integrated LCD driver, and configurable I/Os, it is ideal for
metered power distribution units (PDUs) and rack enclosures
for the data center as well as intelligent power strips and sub
panels in the grid-friendly digital home.
At the measurement interface, the device provides ten analog
inputs for interfacing to voltage and current sensors. Scaled
voltages from the sensors are fed to Teridian’s patented Single
Converter Technology® which uses a 21-bit delta-sigma ADC,
independent 32-bit compute engine (CE), digital temperature
compensation, and precision voltage references to provide
better than 0.5% accuracy over a wide 2000:1 dynamic range.
The integrated MPU core and 128 KB of Flash memory
provides a flexible means of configuration, post-processing,
data formatting, interfacing to host processor via a UART or
SPI interface, displaying output data to an LCD, or using DIO
pins for intelligent relay control. Complete firmware for
common applications is available from Teridian and can be
pre-loaded into the IC during manufacturing test. Alternatively,
a complete array of ICE, development tools and programming
libraries are available to allow customization MPU code for
each application.
LIVE
NEUTRAL
CT-1
CT-2
CT-3
CT-4
CT-5
CT-6
CT-7
CT-8
OUTLET1
OUTLET2
OUTLET3
OUTLET4
OUTLET5
OUTLET6
OUTLET7
OUTLET8
LIVE
NEUTRAL
AC to DC
POWER SUPPLY
+-
DC
POWER FAULT
RELAY DRIVERS,
7-SEG LCD, etc.
(optional)
CONVERTER
IA
IB
IC
ID
IE
IF
IG
IH
VA
VB
VREF
V3.3A V3.3D GNDA GNDD
TERIDIAN
78M6618
REGULATOR
VBAT
V2.5
UARTs
TX
RX
TEMP
SENSOR
RAM
OPT_TX
OPT_RX
I2C
COMPUTE
ENGINE
SPI
COMPARATOR
V1
FLASH
TIMERS
DIO [1:19]
SEG [1:35]
80515
MPU
RTC
OSC/PLL
XIN
ICE XOUT
BATTERY
(optional)
Host uC,
additional 6618s
EEPROM
(optional)
Host uC,
additional 6618s
32 kHz
• < 0.5% Wh accuracy over wide 2000:1 current
range and over temperature
• Exceeds IEC 62053 / ANSI C12.20 standards
• Voltage reference < 40 ppm/°C
• Ten sensor inputs—V3P3 referenced
• 21-bit delta-sigma ADC with independent 32-bit
compute engine (CE)
• 8-bit MPU (80515), 1 clock cycle per instruction
with 4 KB MPU XRAM
• 128 KB Flash with security
• Integrated ICE for MPU debug
• 32 kHz time base with hardware watchdog
timer
• UART and high-speed slave SPI host interface
options
• Up to 19 general purpose 5 V tolerant I/O pins
• LCD driver (up to 70 pixels)
• Packaged in a RoHS compliant (6/6) lead-free
68-pin QFN
• Complete Application Firmware provides:
o True RMS calculations for current, voltage,
line frequency, real power, reactive power,
apparent power, and power factor
o Accumulated watt-hours, kilowatt-hours,
and cost
o Intelligent switch control at zero crossings
o Digital temperature compensation
o Phase compensation (±15°)
o Quick calibration routines
o 46-64 Hz line frequency range with same
calibration
Rev. 1.3
© 2010 Teridian Semiconductor Corporation
1
1 page  
DS_6618_005
78M661w8wDwa.DtaataSShheeet4eUt .com
1 Hardware Functional Description
1.1 Hardware Overview
The Teridian 78M6618 single-chip measurement and monitoring IC integrates all the primary AC
measurement and control blocks required to implement an 8-outlet single-phase PDU with per outlet
metering and intelligent relay control The 78M6618 includes:
• A ten-input analog front end (AFE)
• An independent digital computation engine (CE)
• An 8051-compatible microprocessor (MPU) which executes one instruction per clock cycle (80515)
• A precision voltage reference
• A temperature sensor
• RAM and Flash memory
• A variety of I/O pins
• LCD drivers
Various current sensor technologies are supported including Current Transformers (CT), Resistive Shunts
and Rogowski coils.
In a typical application, the 32-bit compute engine (CE) of the 78M6618 sequentially process the samples
from the analog inputs on pins IA, IB, IC, ID, IE, IF, IG, IH, VA, VB and performs calculations to measure
active energy (Wh) and reactive energy (VARh), as well as A2h and V2h for four-quadrant measurement.
These measurements are then accessed by the MPU, processed further, and output via the peripheral
devices available to the MPU.
In addition to the temperature-trimmed ultra-precision voltage reference, the on-chip digital temperature
compensation mechanism includes a temperature sensor and associated controls for correction of
undesirable temperature effects on measurement accuracy. Temperature-dependent external
components such as a crystal oscillator and current sensors can be characterized and their correction
factors can be programmed to produce measurements with exceptional accuracy over the industrial
temperature range.
A block diagram of the 78M6618 IC is shown in Figure 1. A detailed description of various functional
blocks follows.
Rev. 1.3
5
5 Page 
DS_6618_005
78M661w8wDwa.DtaataSShheeet4eUt .com
1.16 LCD Drivers
The 78M6618 contains a total of 35 dedicated and multiplexed LCD drivers which are grouped as follows:
• 11 dedicated LCD segment drivers.
• 3 drivers multiplexed with the ICE interface (E_TCLK, E_RST, E_RXTX).
• 1 driver multiplexed with auxiliary signal CKTEST (SEG19).
• 4 drivers multiplexed with the SPI port (PCLK, PSDO, PCSZ, PSDI).
• 16 drivers multiplexed with general purpose DIO pins.
• 2 common drivers for multiplexing (50%, or 100% duty cycle) – always available.
With a minimum of 15 driver pins always available and a total of 35 driver pins in the maximum con-
figuration, the device is capable of driving between 30 to 70 pixels of LCD display. At eight pixels per digit,
this corresponds to 3 to 8 digits. The following dedicated and multi-use pins can be assigned as LCD
segment pins for the 78M6618:
• 11 dedicated LCD segment pins: SEG0 to SEG2, SEG7, SEG8, SEG12, SEG14 to SEG18.
• 8 dual-function pins: SEG3/PCLK, SEG4/PSDO, SEG5/PCSZ, SEG6/PSDI, E_RXTX/SEG9,
E_TCLK/SEG10, E_RST/SEG11, and SEG19/CKTEST.
• 16 combined DIO and segment pins: SEG24/DIO4 to SEG31/DIO11, SEG33/DIO13 to
SEG39/DIO19, and SEG63/DIO43. Of which, DIO7/SEG27 through DIO15/SEG35 can be used for
controlling relays.
See the 78M6618 Programmer’s Reference Manual for more information regarding the programmability
of the 78M6618 LCD drivers. See the 78M6618 Hardware Design Guidelines for more information
regarding connecting the 78M6618 LCD drivers to LCDs.
1.17 EEPROM Interface
The 78M6618 provides hardware support for an optional two-pin or a three-wire (µ-wire) EEPROM
interface.
Two-Pin EEPROM Interface
The dedicated 2-pin serial interface communicates with external EEPROM devices. The interface is
multiplexed onto the DIO4 (SCK) and DIO5 (SDA) pins.
Three-Wire (µ-Wire) EEPROM Interface
A 500 kHz three-wire interface, using SDATA, SCK and a DIO pin for CS is also available.
See the 78M6618 Programmer’s Reference Manual for more information regarding the programmability
of the 78M6618 EEPROM interfaces. See the 78M6618 Hardware Design Guidelines for more
information regarding connecting the 78M6618 EEPROM interfaces to various EEPROM.
1.18 SPI Slave Port
The slave SPI port communicates directly with the MPU data bus and is able to directly read and write
XRAM and IORAM locations. It is also able to send commands to the MPU. The interface to the slave
port consists of the PCSZ, PCLK, PSDI and PSDO pins. These pins are multiplexed with the LCD
segment driver pins SEG3 to SEG6.
A typical SPI transaction is as follows. While PCSZ is high, the port is held in an initialized/reset state.
During this state, PSDO is held in HiZ state and all transitions on PCLK and PSDI are ignored. When
PCSZ falls, the port will begin the transaction on the first rising edge of PCLK. A transaction consists of
an 8-bit command, a 16-bit address and then one or more bytes of data. The transaction ends when
PCSZ is raised. Some transactions may consist of a command only. The last SPI command and address
(if part of the command) are available in the IORAM.
Rev. 1.3
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet 78M6618.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 78M6610+PSU | Energy Measurement Processor |  Maxim Integrated |
| 78M6612 | Dual-Outlet Power and Energy Measurement IC | TERIDIAN Semiconductor |
| 78M6613 | Single-Phase AC Power Measurement IC |  Teridian Semiconductor |
| 78M6618 | Octal Power and Energy Measurement IC | TERIDIAN Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |