NJM2646M-TE1 NJR, NJM2646M-TE1 Datasheet - Page 5

• Manufacturer Part Number: NJM2646M-TE1
• Description: Motor / Motion / Ignition Controllers & Drivers 2-Phase DC Brushless Motor Pre-driver IC
• Manufacturer: NJR
• Type: 2 Phase DC Brushless Motor Driverr

Specifications of NJM2646M-TE1

• Operating Supply Voltage: 4 V to 15 V
• Supply Current: 10.5 mA
• Mounting Style: SMD/SMT
• Package / Case: DMP-8
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

communication equipment where 12V operation is required.
[Application Circuit Example]
Hall Elements: HW101A (AKE)
TR1,TR2: 2SK3022 (Panasonic)
1. Selection of C1 and D1:
2. Lock Protection Function (Design of C2 value):
[Design Notes]
APPLICATION NOTE
The NJM2646 is a two-phase motor unipolar pre-driver IC for FET drive. It is suitable for fan motor drivers for
Above application example is designed for 12V operation. It uses the following components:
supply. Silicon rectifier diode (WO3C, 10D1 and equivalent) is appropriate.
a motor and a driver circuit from fatal destruction in case of motor halt.
safety operation. When Lock Detection is activated; Lock Alert Out (LA: Pin 3) goes to L.
C1 is used for a noise reduction purpose. A typical value is 0.1uF.
Optimize the value in actual operating conditions if necessary. D1 is a diode for protection against reverse voltage
Lock Protection Function, consists of Motor Lock Detection and Auto Resume Function, is a safety feature to protect
Motor Lock Detection detects motor halt due to irregular load conditions and then cuts motor driving current f or
A value of C2 determines Lock detection time (Ton) and Auto Resume Time (Toff).
Lock detection time (Ton) is given by:
Where C2 is 0.47uF:
GND
V+
T
T
ON
ON
D1
element
C1
C
. 0
Hall
2
47
R2
R1
Vch
10
Ic
C2
Vcl
6
GND
H1
H2
Ct
sec
2
4
5 .
0 .
10
. 0
95
+
-
6
. 0
18
Auto Restart
Lock Detect
VCC
Refarence
Ra
Logic
Bias
sec
CA
Alarm
Lock
OUT1
OUT2
LA
R3
TR1
TR2
ZD
Motor
ZD
NJM2646
VM
D2
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