NJM2644RB1-TE1 NJR, NJM2644RB1-TE1 Datasheet - Page 7

• Manufacturer Part Number: NJM2644RB1-TE1
• Description: Motor / Motion / Ignition Controllers & Drivers 2-Phase DC Brushless Motor Pre-driver IC
• Manufacturer: NJR

Specifications of NJM2644RB1-TE1

• Mounting Style: SMD/SMT
• Package / Case: TVSP-8
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6. VCC input (Design of Ra and Ca)
7. Protection from active power on and off (D2)
ceramic type is recommended and it must be place near VCC and Gnd.
2) By insertion of ZD2 (zenner diode connected between Collector and Emitter of TR1)
Ca is used if NJM2644 is oscillated or shows unstable operation. A typical value Ca is from 0.01 F to 0.1 F. A
Ra
Ra and Ca must be used if VCC exceeds operating voltage range of NJM2644.
Example) VCC 15V Application
Given that current consumption of NJM2644 is 4mA (at VCC=12V), Ra is given by:
Inserting Ra and Ca also improves ESD immunity.
If an application requires active power on and off, TR1 (TR2) may be damaged or resulted in destruction.
In such application, adding diode between motor winding and Gnd will reduce the damage.
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 generally used when Energy of kick back voltage is large. In such application, power rating of ZD
must take in consideration.
4
15
10
12
3
. 0
75
k
The specifications on this data book are only given for
information, without any guarantee as regards either mistakes or
omissions. The application circuit in this data book are described
only to show representative usages of the product and not
intended for the guarantee or permission of any right including
the industrial rights.
NJM2644
- 7 -