NJM2644M NJR, NJM2644M Datasheet

no-image

NJM2644M

Manufacturer Part Number
NJM2644M
Description
Motor / Motion / Ignition Controllers & Drivers 2-Phase DC Brushless Motor Pre-driver IC
Manufacturer
NJR
Type
2 Phase Unipolar DC Brushless Motor Driverr
Datasheet

Specifications of NJM2644M

Supply Current
4.4 mA
Mounting Style
SMD/SMT
Package / Case
DMP-8
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Two-phase Unipolar DC Brushless Motor Pre-Driver IC
pre-driver IC.
operation. Especially, 1:10 ON/OFF duty ratio while motor is locked
reduces heat generation in motor windings.
two-phase pre-driver NJM2641.
GENERAL DESCRIPTION
FEATURES
BLOCK DIAGLAM
Operating Voltage
Absolute Maximum Voltage 15V
Internal Lock Detect / Auto Protection Release Circuit
FG Output Terminal
Package Outline
The NJM2644 is a 2-phase DC brushless motor
It incorporates Lock Detect and Auto Protection circuit for safety
Moreover, the pin is compatible with 12V LA output
It is suitable for 12V fan motor applications.
V
DMP8 / TVSP8
DD
=4 to 14V
FG
PACKAGE OUTLINE
PIN FUNCTION
NJM2644M
1
2
3
4
1: Vcc
2: H1
3: FG
4: H2
5: GND
6: Ct
7: OUT1
8: OUT2
NJM2644RB1
NJM2644
8
7
6
5
- 1 -

Related parts for NJM2644M

NJM2644M Summary of contents

Page 1

... NJM2641 suitable for 12V fan motor applications. FEATURES Operating Voltage 14V DD Absolute Maximum Voltage 15V Internal Lock Detect / Auto Protection Release Circuit FG Output Terminal Package Outline DMP8 / TVSP8 BLOCK DIAGLAM PACKAGE OUTLINE PIN FUNCTION FG NJM2644 NJM2644M NJM2644RB1 Vcc GND OUT1 ...

Page 2

NJM2644 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 RECOMMENDED OPERATING ...

Page 3

ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Operating Current Icc Hall Input Hysterisis V HYS Range Hall Amplifier Input Bias I B Current Output Voltage Vout Output Leak Current Ileak Lock Alarm Output V Voltage Lock Alarm Leak I leak Current LA Ct ...

Page 4

NJM2644 APPLICATION NOTE The NJM2644 is a two-phase motor unipolar pre-driver IC suitable for fan motor drivers for communication equipment where 12V operation is required. [Application Circuit Example GND R1 Hall element R2 C2 [Design ...

Page 5

Where C2 is 0.47uF Auto Resume Time (Toff) is given by: Vch Vcl sec OFF Idc Where C2 is 0.47uF ...

Page 6

NJM2644 Given that the bias current is set to be 5mA by HW101A datasheet, R1 and R2 can be determined as follows: Vcc Ihbias The output voltage ...

Page 7

By insertion of ZD2 (zenner diode connected between Collector and Emitter of TR1) Energy of kick back voltage is consumed by ZD2. To protect TR1, breakdown voltage of ZD2 must be lower than that of TR1. This method is ...

Related keywords