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High-Side Switch Controller with Current Limiting

Very Robust High-Side Controller Great for Motor Holding Brake Applications

Product Details

Key Features

Parametric specs for Digital I/O
Digital Input/Output Digital Output
Interface Type CMOS
# Channels 1
VSUPPLY (V) (min) 9
VSUPPLY (V) (max) 70
ISUPPLY (µA) (typ) 1.8
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
1.99
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Simplified Block Diagram

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Parameters

Parametric specs for Digital I/O
Digital Input/Output Digital Output
Interface Type CMOS
# Channels 1
VSUPPLY (V) (min) 9
VSUPPLY (V) (max) 70
ISUPPLY (µA) (typ) 1.8
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/16
Budgetary
Price (See Notes)
1.99

Key Features

  • +9V to +70V Operating Supply Range
  • 5V / 50mA Integrated Linear Regulator
  • -40°C to +125°C Ambient Temperature Operating Range
  • 16-TQFN Package, 3mm x 3mm, 0.5mm Pin Pitch
  • Robust Design Features
    • Ultra High-Speed Inductive Load Turn-Off by Clamping to -70V
    • Supply Independent Inductive Clamping
    • Support of Low RON FETs Having Qg (Total) = 50nC
    • External FET Turn-On Propagation Delay < 20μs
    • Active Current Limit Control During Overcurrent
  • Fault Monitoring Diagnostic Features
    • Overcurrent Detect Output
    • High Supply-Voltage Indication
    • Flexible Supply or Load Voltage Monitor
    • Undervoltage Lockout
    • Thermal Warning and Shutdown Protection
    • Device Ready Indication

Applications/Uses

  • Industrial Digital Outputs
  • High-Side Switches
  • Motor Holding Brakes
  • Relay and Solenoid Drivers

Description

The MAX14922 is a high-side, n-channel FET controller for implementing industrial high-side switches for switching ground-connected loads. The MAX14922 device controls an external nMOS power transistor, allowing low RON high-side switch applications from a +9V to +70V supply range.

Fast inductive load turn-off can be achieved with use of a high-voltage TVS diode enabling up to -70V (max) voltage clamping. Ground-connected TVS diodes allow clamping of exceptionally high inductive energies.

Load current is limited to a user-defined value through a sense resistor. External FET overload protection is achieved using an auto-retry timing feature, as defined by a user-selected capacitor (CBLANK at tBLANK input) or optionally using an external timing control.

The MAX14922 features an on-chip comparator enabling monitoring of the high-side switch output or the supply input voltage with a user-selected threshold. An integrated charge pump enables high speed switching rates when using low RON FETs in the 20kHz to 50kHz range.

The MAX14922 is available in a 3mm x 3mm, 16-TQFN package. The MAX14922 device is specified over the -40°C to +125°C operating temperature range.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .