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US890EVK

Description
BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, BCY4
CategoryOther integrated circuit (IC)    The signal circuit   
File Size318KB,12 Pages
ManufacturerMelexis
Websitehttps://www.melexis.com/zh
Environmental Compliance
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US890EVK Overview

BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, BCY4

US890EVK Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMelexis
Parts packaging codeTO-92
package instruction,
Contacts3
Reach Compliance Codecompli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesBRUSHLESS DC MOTOR CONTROLLER
JESD-30 codeO-XBCY-T4
JESD-609 codee3
Number of functions1
Number of terminals4
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1.2 A
Package body materialUNSPECIFIED
Package shapeROUND
Package formCYLINDRICAL
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum supply voltage (Vsup)18 V
Minimum supply voltage (Vsup)2.6 V
Nominal supply voltage (Vsup)12 V
surface mountNO
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formTHROUGH-HOLE
Terminal locationBOTTOM
Maximum time at peak reflow temperature40
Base Number Matches1
US890 / US891
Two-Coil Fan Driver – High Output Current
Features and Benefits
Peak output current up to 1200mA
Low start-up voltage
Low output resistance
High sensitivity integrated Hall Sensor
Power-efficient CMOS and power MOSFETs
Built-in output protection clamping diode
Locked rotor protection and auto-restart
Integrated tachometer (US890) or alarm (US891)
signal protected output
Low cost
2-coil fan driver with FG/RD output in
RoHS Compliant 4-pin VK package
Application Examples
5V/12V DC brushless motor/fan
PC, server, laptop cooling fan
Power supply cooling fan
Large and small fan size
Ordering Information
Part No.
US890
US891
Temperature Code
E (-40° to 85°
C
C)
E (-40° to 85°
C
C)
Package Code
VK (4-pin TO-92)
VK (4-pin TO-92)
1 Functional Diagram
2 General Description
The US890/891 is a one-chip solution for driving
two-coil brushless DC motors and fans.
Based on the advanced Melexis CMOS process,
the IC contains a Hall-effect sensor, dynamic
offset correction and powerful output drivers with
1200mA peak output current capability.
Specially designed for driving large fans, the
device is optimized for low start-up voltage.
Frequency Generator or Rotation Detection is
available. The open-drain output makes easier the
connectivity with any external interface such as
hardware monitoring or Super I/O IC.
These features are combined with the Melexis
patented no-V
DD
design to fit the IC in a small 4-
pin VK package.
3901000890
Rev 002
Page 1 of 12
Data Sheet
Sep/07

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Description BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, BCY4 BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, BCY4 BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, BCY4 BRUSHLESS DC MOTOR CONTROLLER, 1.2 A, BCY4
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