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MAX14922

High-Side Switch Controller with Current Limiting

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

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概要

説明

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 R_ON 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 (C_BLANK at t_BLANK 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 R_ON 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.

主な特長

+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 R_ON FETs Having Q_g (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

アプリケーション/用途

産業用デジタル出力
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スペックパラメータ

スペックパラメータを参照する: Digital I/O (16)

Part Number

Digital Input/Output

µC Interface Type

Channels

V_SUPPLY
(V)

I_SUPPLY
(µA)

LTH Delay
(µs)

HTL Delay
(µs)

Oper. Temp.
(°C)

Package/Pins

Budgetary
Price

min

max

typ

See Notes

MAX14922 NEW!

Digital Output

CMOS

1.8

1.2

1.4

-40 to +125

TQFN-CU/16

$1.88 @1k

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