Analog DevicesMAX14916AFM+Current Limit Switches

MAX14916: Industry's Smallest Octal Industrial 1A/Quad 2A High Side Switch with Diagnostics

The MAX14916 and MAX14916A are equipped with eight high-side switches with an on-resistance of only 120mΩ (typ), or 250mΩ (max) at 125°C ambient temperature. Each channel is specified to handle up to 1.1A (MAX14916) or 1.5A (MAX14916A) of continuous current. Similarly, two adjacent channels can be driven together to form four 2.4A (MAX14916) or 3A (MAX14916A) switches.

The SPI interface on the MAX14916 and MAX14916A has a built-in chip addressing decoder, allowing communication with up to four MAX14916 or MAX14916A devices utilizing a common SPI chip select (CS).

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

Each channel is equipped with open-wire detection that can detect an open-load in both switch 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 single TVS on VDD. Integrated surge protection works for quad and octal configuration.

The MAX14916 and MAX14916A are available in a compact 48-pin 6mm x 6mm QFN package.

Key Features and Benefits

• •  MAX14916 Current Limit, 1.1A (min) or 1.38A (typ)
• •  MAX14916A Current Limit, 1.5A (min) or 2A (typ)
• •  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, with Switches Both in ON and OFF States
• •  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 5.5VSafety and Regulatory Approvals (Pending)
• •  Compact 6mm x 6mm QFN Package

Applications

• •  Industrial Digital Outputs
• •  PLC Systems

Evaluation Board

The MAX14916 can be evaluated with either the MAX14916PMB or the MAX14916EVKIT.

Block Diagrams and Tables