Details, datasheet, quote on part number: NJM2644M
PartNJM2644M
CategoryPower Management => Motor Controller/Drivers => DC Motor drivers/Controllers
DescriptionTwo-phase Unipolar DC Brushless Motor Pre-Driver IC
The NJM2644 is a 2-phase DC brushless motor pre-driver IC.
It incorporates Lock Detect and Auto Protection circuit for safety
operation. Especially, 1:10 ON/OFF duty ratio while motor is locked
reduces heat generation in motor windings.
Moreover, the pin is compatible with 12V LA output
two-phase pre-driver NJM2641.
It is suitable for 12V fan motor applications.
CompanyNJR Corporation
DatasheetDownload NJM2644M datasheet
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Features, Applications

s GENERAL DESCRIPTION s PACKAGE OUTLINE The 2-phase DC brushless motor pre-driver IC. It incorporates Lock Detect and Auto Protection circuit for safety operation. Especially, 1:10 ON/OFF duty ratio while motor is locked reduces heat generation in motor windings. Moreover, the pin is compatible with 12V LA output NJM2644M NJM2644RB1 two-phase pre-driver It is suitable for 12V fan motor applications. s FEATURES Operating Voltage to 14V Absolute Maximum Voltage 15V Internal Lock Detect / Auto Protection Release Circuit FG Output Terminal Package Outline TVSP8 s BLOCK DIAGLAM s PIN FUNCTION

s ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Hall Input Voltage Range Output Current (Peak) Lock Alarm Output Voltage Hall Input Differential Voltage Lock Alarm Output Current Operating Temperature Range Operating Junction Temperature Range Storage Temperature Range Power Dissipation (Ta=25C) UNIT NOTE C mW Device itself

SYMBOL Vcc VIH IO UT VOLA VIHD IOLA Topr Toj Tstg PD

s RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL Supply Voltage Hall Input Voltage Common Mode Voltage Junction Temperature Vcc VICM Tj

s ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Operating Current Hall Input Hysterisis Range Hall Amplifier Input Bias Current Output Voltage Output Leak Current Lock Alarm Output Voltage Lock Alarm Leak Current Ct Charge Current Ct Discharge Current Charge / Discharge Current Ratio Ct H-level Cense Voltage Ct L-level Cense Voltage Auto Protection Release ON Time Auto Protection Release OFF Time Icc VHYS IB Vout Ileak VLA ILAleak Ic Idc Ic/Idc Vch Vcl Ton Toff CONDITION IOUT=20mA VCC=14V Lock Alarm VCt=1.5V Ct=0.47F MIN. 2.5 0.6 (VDD =12V, Ta=25C) TYP. MAX. UNIT A mA


 

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