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High-Side Switch Controller with Current Limiting

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

产品详情

主要特征

应用/用途

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)
1.88
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参量

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)
1.88

主要特征

  • +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

应用/用途

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

描述

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.

简化框图

MAX14922: Functional Block Diagram MAX14922: Functional Block Diagram Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心