NJU7357
Single-phase DC Brushless Motor Driver IC
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PACKAGE OUTLINE
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GENERAL DESCRIPTION
The NJU7357 is single-phase DC brushless motor driver IC.
And It features MOS-FET driver circuit for better output
characteristics.
NJU7357 features Lock Detect (Ct less type), Frequency
Generator Output, Thermal Shutdown Circuit and PWM_IN
INPUT for Rotation Speed Control.
NJU7357RB1
Maximum output current is 1000mA and Continuance output
current is 400mA.
It is suitable for
variable speed FAN required Low Noise &
Good Efficiency characteristics.
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FEATURES
•
Operating Voltage
2.2 to 5.5V
I
DD
=2mA
•
Low Operating Current
•
Low Saturation Output Voltage
Vsat=
±0.2V
@Io=±400mA
•
Lock Detect / Auto Release Circuit (Condenser less type)
•
Thermal Shutdown Circuit
•
Frequency Generator Output
•
CMOS Technology
•
Package Outline
TVSP8
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BLOCK DIAGLAM
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PIN FUNCTION
1: OUT B
2: V
DD
3: IN +
4: IN -
5: FG
6: PWM_IN
7: OUT A
8: V
SS
1
LD
TSD
8
2
Control
7
3
6
4
5
-1-
Ver.1.0
NJU7357
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ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Input Voltage
Output Current (Peak)
Operating Temperature Range
Storage Temperature Range
Power Dissipation
Junction Temperature
(Ta=25°C)
NOTE
(
*
1)
(
*
2)
RATINGS
+7.0
-0.3
∼
V
DD
1000
-40
∼
+85
-50
∼
+150
400
150
SYMBOL (unit)
V
DD
(V)
V
ID
(V)
I
O PEAK
(mA)
Topr (°C)
Tstg (°C)
P
D
(mW)
Tjmax(°C)
Device itself
(
*
1). Input voltage is not to be over supply voltage to really use.
(
*
2). This value is not to be over Pd.
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RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
CONDITION
Supply Voltage
V
DD
-
(Ta=25°C)
MAX.
UNIT
5.5
V
MIN.
2.2
TYP.
5.0
-2-
NJU7357
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INPUT-OUTPUT TRUTH TABLE
IN+
H
L
H
L
IN -
L
H
L
H
PWM
H
H
L
L
OUTA
H
L
L
L
OUTB
L
H
L
L
FG
L (Output Transistor ON )
Z (Output Transistor OFF )
L (Output Transistor ON )
Z (Output Transistor OFF )
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PWM TIMING CHART
IN+
IN-
PW M_IN
OUTA
OUTB
FG
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FG TIMING CHART
Motor locked
IN+
IN-
PW M_IN
Lock release
OUTA
OUTB
FG
Toff
Ton
Toff
Motor lock protection period
-4-
微控制器 MCU
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