US72 datasheet(1/9 Pages) MELEXIS

No. de pieza	US72

Descripción Electrónicos	Single Coil Fan Driver

PDF	9 Pages

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Fabricante Electrónico	MELEXIS [Melexis Microelectronic Systems]

Página de inicio	http://www.melexis.com

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1 / 9 page

US72/73

Single Coil Fan Driver

3901090261

Page 1 of 9

Data Sheet

Rev. 002

May/04

Features and Benefits

Full Bridge Driver

High Sensitivity Hall Sensor

Locked Rotor Shutdown and Auto-Restart

Power-Efficient CMOS and Power MOSFETs

Integrated tachometer (US72) or alarm (US73) signal outputs

Applications

For 12V/24V Fans

Ordering Information

Part No.

Temperature Suffix

Package Code

US72

E (-40°C to 85°C)

DC (8-Pin narrow SOIC)

US73

E (-40°C to 85°C)

DC (8-Pin narrow SOIC)

Functional Diagram

Locked-Rotor

Protection

N1

P2

N2

Hall

Amp.

Gate Drive

P1

Gate Drive

6

3

Regulator

4

Switching

Logic

Clamp

1

Out1

Out2

8

5

2

7

FG/RD

Vdd

Gnd

Description

The US72 and US73 provide a monolithic

solution for driving single-coil fans. The bridge

drivers provide bi-directional current through the

single phase motor winding.

US72: The tachometer/Frequency Generator

(FG) version produces a logic signal, which is

aligned with the Hall plate signal.

US73: The Rotation Detector (RD) / Alarm

Signal version has a low output in the normal

condition. When a locked rotor condition occurs

the RD changes to a high state.

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US72 Datasheet(PDF) 1 Page - Melexis Microelectronic Systems

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