NJU7346 New Japan Radio Co.,Ltd, NJU7346 Datasheet - Page 6

• Manufacturer Part Number: NJU7346
• Description: Nju7346 Single-phase Dc Brushless Motor Driver Ic
• Manufacturer: New Japan Radio Co.,Ltd

NJM7346
[Design Notes]
1. Selection of C1 and D1:
2. Design of hall element bias resistance (R1 and R2)
[Application Circuit Example]
- 6 -
APLICATION NOTE
The NJU7346 is a single-phase DC brushless motor driver IC in small VSP10 package.
With minimal external components, It can drive up to 200mA of motor current for small fan application.
components:
Hall elements: HW101A (AKE)
supply. Silicon rectifier diode (WO3C, 10D1 and equivalent) is appropriate.
Non-excitation hall bias voltage is to be set at a half of V
Therefore the same value of hall bias resistors is selected for R1 and R2.
Above application example is designed for 12V operation with motor current of 200mA. It uses the following
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
The common-mode input voltage is between 0.2V and V
Hall amplifier is a differential amplifier.
GND
V
DD
D1
element
C1
Hall
R2
R1
IN+
IN-
V
SS
NJU7346
V
DD
DD
DD
for effective use of common-mode input voltage range.
-1.5V and the input signal must be within the range.
OUTA
OUTB
FG
FG out
R3
Motor