Datasheet > US91AEZE-AAA-000-SP

US91AEZE-AAA-000-SP

更新时间： 2024-11-04 22:57:27

品牌	Logo	应用领域
迈来芯 - MELEXIS		驱动
页数	文件大小	规格书
16页	1589K
描述
2-COIL FAN DRIVER 4.7 30V 250MA

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US90A/US91A

Datasheet

1. Features and Benefits

3. Description

Integrated High sensitivity Hall Sensor

The US90A/91A is a one-chip solution for driving

two-coil brushless DC cooling fans.

No VDD concept

Locked rotor protection and auto-restart

Power-efficient CMOS and power MOSFETs

Built-in output protection clamping diode

Based on the advanced Melexis CMOS process,

the IC contains a Hall-effect sensor, dynamic

offset correction and low side output drivers.

Frequency Generator or Rotation Detection is

available. The open-drain output makes the

connectivity with any external interface such as

hardware monitoring or Super I/O IC easier.

Integrated tachometer (FG: US90A) or alarm

(RD: US91A) signal output

FG/RD SIP package options:

4 pins VA and VK package

These features are combined with the Melexis

patented no-VDD design to fit the IC in small 4-pin

VK and VA package. The device is also delivered in

DC package for automatic assembly.

SMD package options

SOIC8 bent leads

SOT25 straight leads

RoHS Compliant

Peak current up to 500mA

2. Application Examples

12V and 24V 2-coil fans

Figure 1

REVISION 06 – 20 JUL 2017

12 3 4 5 6 7...16

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