Smart Dual-Coil Relay Driver Evaluation Board


The FAN324x “smart” dual-coil relay drivers are designed to drive bi-stable polarized latching relays that connect and disconnect electrical power in smart electronic meters. The FEBFAN324x_001NDA evaluation board is designed to evaluate any of the products in the FAN324x series, such as FAN3240 or FAN3241.

The output of the FAN324x is rated for operation with supply rails from 8 V to 60 V. The filter / timer block prevents inadvertent switching from noisy input signals by providing input-pulse qualification (tQUAL) and maximum output pulse-width limit (t MAX). The parameters are factory adjustable and additional configurations are available. XOR input protection is also provided to prevent both outputs from being on at the same time. The Under-Voltage Lockout (UVLO) function disables the outputs until the supply voltage is within the operating range.

The FAN324x has two separate driver channels for the relay-open and relay-close signals needed to operate dual-coil relays. One enable/disable pin allows shutdown of both channels independent of the input signals. An internal thermal shutdown (TSD) function is provided for thermal protection.

This FEBFAN324x_001NDA evaluation board uses a two-layer Printed Circuit Board (PCB). The size of the board is designed to be small enough to be evaluated in confined spaces of the meter. Its form factor is 45.72 x 20.32 mm (1.8 x 0.8 inches).

  • Building and Home Control
  • Energy Generation & Distribution
  • Smart E-Meters
  • Industrial Dual-Coil Relay-Driving Applications
  • 8-V to 60-V Operation Range for use with 12-V, 24-V, or 48-V Relays
  • Strong DC Current to Break through Welded Contacts without External Switches
  • Integrated Linear Regulator for Isolated or Non-Isolated Meter Power Designs
  • Accurate Input Filter Time and XOR Input Protection
  • Accurate Maximum Output Pulse Width
  • Two Output Operating Modes:
    Follow Input Width Up to Maximum Value
    Fixed Maximum Output Pulse Width
  • Rated from –40°C to +105°C Ambient
  • Enable Pin for Operational Flexibility
  • Internal Thermal Shutdown Protection (TSD)
  • 3.3-V or 5-V Square-Wave Logic Input Signals

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Smart Dual-Coil Relay Driver Evaluation Board

Evaluation Board



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Eval Board: Manual

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Eval Board: Manual

October 25, 2017

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