PM9603AP

sames

4/18

FUNCTIONAL DESCRIPTION

1. Power Calculation

In the Application Circuit (see Figure 2), the output current from the current sensor

will be between 0 and 16µA

current input stage of the module, saturates at input currents greater than 18µA

The mains voltage (Voltage + 15% - 20%) is used to supply the circuitry with power.

A SA9603B utilize current information from the current sensor (shunt resistor),

together with the mains voltage to perform the power calculation.

The SA9603B integrated circuits may be adjusted to accommodate any voltage or

current values. The method for calculating external component values is described

in paragraph 6 (Circuit Description).

SAMES offers two evaluation module options, namely 230V/80A and 115V/80A.

The on chip registers are accessed via the isolated SPI bus.

2. Electrostatic Discharge (ESD) Protection

The device's inputs/outputs are protected against ESD according to the Mil-Std

883C, method 3015. The modules resistance to transients will be dependant upon

the protection components used.

3. Power Consumption

The overall power consumption rating for this power metering application (Figure 2),

is under 500mW, excluding the current sensor, when the supply is taken directly from

the mains.

4. Isolation

The reference of the module is connected to neutral.

5. Isolated Input/Output Interface

The isolated interface is provided to allow the user to access the registers of the

SA9603B.

A 25-Way D type connector (female) is provided on the PM9603AP module. The

connector SK1 connects via a one to one connected cable to a Personal Computer

parallel port.

6. Circuit Description

In the Application Circuits, (Figures 1), the components required for power metering

applications are shown.

In Figure 1, a shunt resistor is used for current sensing. In this application, the

circuitry requires a +2.5V, 0V, -2.5V DC supply.