Compact Industrial Octal 1A/Quad 2A High-Side Switch with Diagnostics

 

Part Number	Replacement	Explanation

Description

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The MAX14916 has eight high-side switches specified to deliver up to 1.1A (min) continuous current per channel. The two adjacent channels can be paralleled to form four 2.4A high-side switches. The high-side switches have on-resistance of 250mΩ (max) at 125°C ambient temperature.

The SPI interface has a built-in chip addressing decoder, allowing communication with multiple MAX14916s utilizing a common SPI chip select (active-low CS pin pulled low).

The SPI interface provides flexibility for global and per-channel configuration and diagnostic, including undervoltage detection, open wire/load detection, overload and current limiting reporting, thermal conditions reporting, and more.

Open load detection detects both open-wire/open-load conditions with switches in the on and off states. LED drivers provide indication of per-channel fault, status, and supply undervoltage conditions. Internal active clamps allow for fast turn-off of inductive loads.

Integrated line-to-ground and line-to-line surge protection only requires a TVS on V_DD. Integrated surge protection works for quad and octal configuration.

The MAX14916 is available in a compact 48-pin 6mm x 6mm QFN package.

MAX14916: Simplified Block Diagram Enlarge+

Key Features

• Robustness and Smart Diagnostics
  • 65V Absolute Maximum Supply Range
  • Internal Clamps for Fast Inductive Load Demagnetization
  • CRC Error Checking on the SPI Interface
  • Watchdog Timer
  • Open-Wire Detection, Both with Switches On and Off
  • Undervoltage Detection with UVLO
  • Loss of V_DD or GND Protection
  • Thermal Shutdown Protection
  • Integrated ±1kV/42Ω IEC61000-4-5 Surge Protection
  • -40°C to +125°C Operating Ambient Temperature
• Reduces Power and Heat Dissipation
  • 250mΩ (max) On-Resistance at T_A = 125°C
  • 2mA (typ) Supply Current
  • Accurate Output Current Limiting
• Flexibility
  • Addressable SPI Interface Reduces Isolation Cost
  • SYNCH Input for Simultaneous Update of Switches
  • LED Driver Matrix for 16 LEDs, Powered by 24V, 5V, or 3.3V
  • Flexible Logic Voltage Interface from 2.5V to 5.5V
• Compact 6mm x 6mm QFN Package

Applications/Uses

• Industrial Digital Outputs
• PLC Systems