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MAX4896 Space-Saving, 8-Channel Relay/Load Driver

MAX4896

Space-Saving, 8-Channel Relay/Load Driver

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Description

The MAX4896 8-channel relay and load driver is designed for medium voltage applications up to 50V. This device is offered in a 20-pin, 5mm x 5mm TQFN package, resulting in substantial board space savings.

The MAX4896 8-channel relay driver offers built-in inductive kickback protection, drive for latching/nonlatching or dual-coil relays, and open-load and short-circuit fault detection.The MAX4896 also protects against overcurrent conditions. Each independent open-drain output features a 3Ω (typ) on-resistance, and is guaranteed to sink 200mA of load current (VS ≥ 4.5V).

A built-in overvoltage protection clamp handles kick-back-voltage transients, which are common when driving inductive loads. Thermal-shutdown circuitry shuts off all outputs (OUT_) when the junction temperature exceeds +160°C. The MAX4896 employs a reset input that allows the user to turn off all outputs simultaneously with a single control line.

The MAX4896 includes a 10MHz SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The serial interface is compatible with TTL-/CMOS-logic voltage levels and operates with a single +2.7V to +5.5V supply. In addition, the SPI output data can be used for diagnostics purposes including open-load and short-circuit fault detection.

The MAX4896 is offered in the extended (-40°C to +85°C) and (-40°C to +125°C) operating temperature ranges.

Key Features

  • Relay Driver Supports Medium Voltage Applications
    • Up to 50V Continuous Drain-to-Source Voltage
    • +2.7V to +5.5V Logic Supply Voltage
    • Guaranteed Drive Current: VS ≥ 4.5V: 200mA (All Channels On)/410mA (Individual Channels) VS ≤ 3.6V: 100mA
  • Integration and Small Packages Save Board Space
    • 5mm x 5mm, 20-Pin TQFN Package
  • Built-In Protection Circuitry Increases Safety
    • Built-In Output Clamp Protects Against Inductive Kickback
    • Open-Load and Short-Circuit Detection and Protection
    • Thermal Shutdown
    • Active-Low RESET Input Turns Off All Outputs Simultaneously
    • Active-Low FLAG Output for µP Interrupt
    • Built-in Power-On Reset
    • Temperature Range (-40°C to +125°C)
  • Serial Port Supports Most Microcontroller Architectures
    • SPI-/QSPI-/MICROWIRE-Compatible Serial Interface
    • Serial Digital Output for Daisy-Chaining and Diagnostics
  • Low Power Consumption Reduces Power Supply Requirements Saving System Cost
  • Low 100µA (Max) Quiescent Supply Current

Applications/Uses

  • ATE Systems
  • Industrial Equipment
  • Power-Grid Monitoring and Protection Equipment
  • White Goods
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