NJM2640E-TE1 NJR, NJM2640E-TE1 Datasheet - Page 5

• Manufacturer Part Number: NJM2640E-TE1
• Description: Motor / Motion / Ignition Controllers & Drivers 2-Phase DC Brushless Motor Pre-Driver IC
• Manufacturer: NJR
• Type: Two Phase Unipolar DC Brushless Motor Pre-Driver ICr

Specifications of NJM2640E-TE1

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 4 V to 55 V
• Supply Current: 3 mA to 4 mA
• Mounting Style: SMD/SMT
• Package / Case: EMP-8
• Operating Temperature: - 40 C to + 85 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Lock Protection
shown in the picture below.
Lock detection time (Ton) is given by:
Where C2 is 0.47uF:
Auto Resume Time (Toff) is given by:
Where C2 is 0.47uF:
In actual application, Lock detection time (Ton) is affected by the mechanical time constant of a motor.
Therefore, constant start up must be confirmed in actual evaluation taking operating variations
(i.e.Temperature, Voltage change and so on) in consideration.
A typical value of C2 is either 0.47uF or 1uF depending on a motor.
10k .
It must be noted that Lock Alert Out stays a H state during few hundred milliseconds from power up as
Ct Teminal voltage
LATeminal voltage
Lock Alert Out (LA: Pin 3) is a open collector output and R3 is a pull up resister. A typical value of R3 is
T
OFF
T
T
T
Motor output
OFF
ON
ON
Hall input
C
C
. 0
2
. 0
2
Vch
47
47
Vch
Idc
10
Ic
10
Vcl
Vcl
6
6
sec
sec
3
. 0
2
8 .
2
5 .
75
5 .
10
0
10
0
7 .
7 .
6
6
Motor Locked
. 0
. 1
LA terminal output
22
13
Power supply
sec
sec
t
on
High
Motor Lock protection period
t
OFF
Hundreds of millimeter second
Returns to normal operation
NJM2640
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