NJM2626
- 1 -
Ver.2005-01-17
PWM TYPE 3-PHASE DC BRUSHLESS MOTOR CONTROL IC
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GENERAL DESCRIPTION
The NJM2626 is a 3-phase DC brush less motor control
pre-driver IC with PWM control.
It takes hall IC inputs and generates motor driving
waveform.
Output pre-driver is optimized to work with external power
MOS transistors for better power handling.
The NJM2626 can easily implement 3-phase DC motor
application with speed control feature.
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PACKAGE OUTLINE
NJM2626V
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FEATURES
Operating Voltage 6 to 26V
Pre-driver circuit
Lower arm : (Iout=+30mA/-30mA TYP.)
Upper arm : (Iout=30mA TYP.)
Current limit sense voltage (Current limit=0.5V
10%)
Internal Oscillator
(Frequency control for external capacitor)
Forward or Reverse direction
Internal Soft Start (External capacitor to Verr pin)
Internal ON/OFF Circuit (No-output is Verr pin to GND)
Bipolar Technology
Package Outline SSOP16
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PIN CONNECTION
NJM2626V
1.FR
2.Vref
3.H1
4.H2
5.H3
6.OSC
7.Verr
8.GND
9.Ilimit
10.WL
11.VL
12.UL
13.WH
14.VH
15.UH
16.VCC
1
2
3
16
15
14
13
4
5
6
12
11
10
7
8
9
NJM2626
- 2 -
Ver.2005-01-17
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BLOCK DIAGRAM
3:H1
4:H2
5:H3
1:FR
Rotor
Position
Decode
+
-
16:VCC
Vref
2:Vref
+
-
UVLO
VCC
Saw
Osillator
+
-
6:OSC
7:Verr
Logic
8:GND
9:ILimit
10:WL
11:VL
12:UL
13:WH
14:VH
15:UH
VCC
VCC
VCC
Vref
NJM2626
- 3 -
Ver.2005-01-17
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BABSOLUTE MAXIMUM RATINGS (Ta=25
C)
PARAMETER SYNBOL RATINGS UNIT
Maximum Supply Voltage
V
CC
28 V
Maximum Output Current
Io
MAX
40 mA
Power Dissipation
P
D
300 (Device itself)
640 (NOTE1)
mW
Operating Temperature Range
Topr
-40
+85
C
Storage Temperature range
Tstg
-50
+150
C
NOTE1 :
EIA/JEDEC STANDARD Test board (76.2*114.3*1.6mm, 2layers, FR-4) mounting
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ELECTRICAL CHARACTERISTICS (V
CC
=12V, Ct=1000pF, Cref=1
F, Ta=25
C)
Total Device
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
Operation Supply Voltage
V
CC
-
6.0
-
26.0
V
Under Voltage Sense Voltage
UVLO
Output Enable
V
CC
Decreasing
4.5 5.0 5.5 V
Hysteresis Voltage
(Under Voltage Lock Out)
UVLO
- 0.35
0.45
0.55
V
Supply Current
I
CC
RL=
- 12.0
18.0
mA
Reference Voltage Section
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
Reference Voltage Output
Vref
Iref=1.0mA
3.6
4.0
4.4
V
Line Regulation
Vref
LI
V
CC
=6V
18V
- 50
100
mV
Load Regurlationj
Vref
LO
Iref=1.0mA
20.0mA
- 15 50
mV
Hall Amplifier Section
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
Input H Level Voltage
V
hH
-
V
CC
-0.8
- - V
Input L Level Voltage
V
hL
- -
-
0.8
V
Input Bias Voltage
I
ho
Vin=0.8V
- - -400 nA
Pull-up Resistance
R
PUH
Vin=0.8V
7 10 13 k
Output Section
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
Under Arm Output Voltage 1
V
OH
(D) Isource=30mA
10 10.3
-
V
Under Arm Output Voltage 2
V
OL
(D) Isink=30mA
-
0.5
1.0
V
Output Clamp Voltage
V
CL
(D) V
CC
=26V -
18
20
V
Upper Arm Output Voltage
V
OL
(U) Isink=30mA
-
0.5
1.0
V
Output Leak Current
Io
LEAK
- -
-
1.0
uA
NJM2626
- 4 -
Ver.2005-01-17
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ELECTRICAL CHARACTERISTICS (V
CC
=12V, Ct=1000pF, Cref=1
F, Ta=25
C)
Over Current Sense Section
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
Sense Voltage
V
TH
-
0.45
0.50
0.55
V
Hysteresis Voltage
V
THhys
- -
0.1
-
V
Input Voltage Ratio
V
IN
- -
-
3.0
V
Input Bias Current
I
IB
V
IN
=0V -
-0.9
-5.0
A
Oscillator Section
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
Oscillator Frequency
f
osc
-
22
27
33
kHz
Supply Voltage Change Ratio
f
osc
/
V
V
CC
=6V
18V
- 1 5 %
PWM0% Sense Voltage
PWM0
PWM DUTY=0%
-
-
0.35
V
PWM100% Sense Voltage
PWM1
PWM DUTY=100%
3.5
-
-
V
Saw Wave Peak Voltage
Vp
fosc
- 2.4
2.8
3.2
V
Saw Wave Bottom Vltaeg
Vb
fosc
- 0.75
0.9
1.05
V
Error Amplifier Section
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
Input Offset Voltage
V
IO
- -
7
-
mV
Input Bias Current
I
IBRR
-
- -46 - nA
Input Common Mode
Voltage Range
V
ICMRR
- 0
-
Vref
V
Forward or Reverse Direction Section (FR input terminal)
PARAMETER SYMBOL TEST
CONDITION MIN.
TYP.
MAX.
UNIT
Output Forward Direction
V
F
-
Vref-0.8
- Vref V
Output Reverse Direction
V
R
- -
-
0.8
V
Hysteresis Voltage Ratio
V
FR
- -
0.5
-
V
Pull-Up Resistance
RPU
FR
- 7
10
13
k
(note) Output swich test are performed under pulsed conditions to minimize power dissipation.
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HALL INPUT vs HALL OUTPUT TRUTH TABLE
FR=L FR=H
H:Source,L:Sink,X:Hi-Z
H1 H2 H3 H1 H2 H3 UH VH WH UL VL WL
H L H L H L X L X H L L
H L L L H H X X L H L L
H H L L L H X X L L H L
L H L H L H L X X L H L
L H H H L L L X X L L H
L L H H H L X L X L L H
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FR INPUT TERMINAL
Terminal Voltage
Direction
L input
F
H input
R
NJM2626
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Ver.2005-01-17
s
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TYPICAL APPLICATION
3:H1
4:H2
5:H3
1:FR
Rotor
Position
Decode
16:VCC
Vref
2:Vref
+
-
UVLO
VCC
Saw
Osillator
6:OSC
7:Verr
Logic
8:GND
9:ILimit
10:WL
11:VL
12:UL
13:WH
14:VH
15:UH
Motor
VM
-
-
+
+
A rotation direction change must be made after motor stopped completely.
When PWM duty is extremely small, two or more switching elements can not be driven entirely.
In such case, switching elements will generate excess heat and it may cause destruction of the
switching devices. Therefore, extensive heat evaluation is necessary for switching device selection
particularly in consideration of the area of safety operation (ASO).
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