NJU7361 New Japan Radio Co.,Ltd, NJU7361 Datasheet - Page 6

• Manufacturer Part Number: NJU7361
• Description: Nju7361 Single-phase Dc Brushless Motor Driver Ic
• Manufacturer: New Japan Radio Co.,Ltd

NJU7361
With minimal external components, that can drive up to 250mA of motor current for small fan application.
[Application Circuit Example]
[Design Notes]
components:
1. Selection of C1 and D1:
2. Position Detection Circuit Hall Device
1) Hall Bias unused application circuit
- 6 -
The NJU7360 are single-phase DC brushless motor driver IC in small TVSP8 package.
Above application example is designed for 5V operation with motor current of 250mA. It uses the following
Hall elements: HW101A (AKE)
Optimize the value in actual operating conditions if necessary. D1 is a diode for protection against reverse voltage
supply. Silicon rectifier diode (WO3C, 10D1 and equivalent) is appropriate.
2-1. When using HB (R1 design)
temperature characteristics is obtained, resulting in stable linear drive. If it is necessary to adjust the Hall output
amplitude, perform adjustment with R1.
2-2. When using V
The input bias voltage for the amplifier must be used within the Hall input common mode voltage (0.4 - V
including the amplitude of the signal. It is recommended that the Hall bias voltage be one half of the power supply
voltage, that is, V
When it is necessary to increase the Hall bias current to increase the Hall output amplitude, obtain Hall bias from V
APPLICATION NOTE
By connecting a Hall device to the Hall bias terminal (HB), a constant Hall output amplitude that has good
C1 is used for a noise reduction purpose. A typical value is 0.1uF.
DD
DD
/2.
VDD
(R2 and R3 design)
element
D1
C1
Hall
R1
OUTB
IN
HB
NC
IN+
Motor
NJU7361
M
OUTA
PWM
VSS
VDD
FG
RL
PWM-IN
FG-OUT
Ver.2008-05-23
DD
-1 V)
DD
.