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PDF NJU7327 Data sheet ( Hoja de datos )
| Número de pieza | NJU7327 | |
| Descripción | Single-phase DC Brushless Motor Driver IC | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJU7327
Single-phase DC Brushless Motor Driver IC
I GENERAL DESCRIPTION
I PACKAGE OUTLINE
The NJU7327 is a single-phase DC brushless motor
driver IC for small fan-motor and high power applications. It
features MOS-FET driver circuit for better saturation
characteristics. Slew late of amplifiers and feedback
resistors are optimized to achieve low-noise motor
operation. The NJU7327 also includes frequency generator
(FG) output for various control needs.
NJU7327R
I FEATURES
• Operating Voltage VDD=3.5 ∼ 15V
• FG Output
• Internal Lock Detect
• Low Operating Current
• Low Saturation Output Voltage
Vsat=±0.35V @Io=±200mA
• C-MOS Technology
• Package Outline VSP10
I BLOCK DIAGLAM
1
LOCK
DETECT
2 FG
10
+- 9
38
4 AMP B
AMP A 7
INT
56
I PIN FUNCTION
1: LD
2: FG
3: VSS
4: OUT B
5: VDD
6: VDD
7: OUT A
8: VSS
9: IN-
10: IN+
-1-
1 page  
NJU7327
I APPLICATION NOTE
The NJU7327 is a single-phase DC brushless motor driver IC in small VSP-10 package.
With minimal external components, it can drive up to 200mA of motor current for small fan application.
[Application Circuit Example]
V+ D1
GND
C1
R1
R3
Hall
element
VDD
IN+
IN-
OUTA
Motor
[Design Notes]
R2
LD
OUTB
C2 NJU7327
VSS
FG FG out
Above application example is designed for 12V operation with motor current of 200mA. It uses the following
components:
Hall elements: HW101A (AKE)
1. Selection of C1 and D1:
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
supply. Silicon rectifier diode (WO3C, 10D1 and equivalent) is appropriate.
2. Lock Protection Function (Design of C2 value):
Lock Protection Function, consists of Motor Lock Detection and Auto Resume Function, is a safety feature to protect
a motor and a driver circuit from fatal destruction in case of motor halt.
Motor Lock Detection detects motor halt due to irregular load conditions and then cuts motor driving current f or
safety operation. A value of C2 determines Lock detection time () and Auto Resume Time (Toff).
-5-
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet NJU7327.PDF ] | |
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