SANYO ENA1137B

Ordering number : ENA1137B
STK673-011-E
Thick-Film Hybrid IC
3-Phase Stepping Motor Driver
Overview
The STK673-011-E is a 3-phase stepping motor driver hybrid IC with built-in microstep controller having a bipolar
constant current PWM system, in which a power MOSFET is employed at an output stage.
It includes a 3-phase distributed controller for a 3-phase stepping motor to realize a simple configuration of the motor
driver circuit.
The number of motor revolution can be controlled by the frequency of external clock input. 2, 2-3, W2-3 and 2W2-3phase excitation modes are available. The basic step angle of the stepping motor can be separated as much as one-eighth
2-3-phase to 2W2-3-phase excitation mode control quasi-sine wave current, thereby realizing low vibration and low
noise.
Applications
• As a 3-phase stepping motor driver for transmission and reception in a facsimile.
• As a 3-phase stepping motor driver for feeding paper feed or for an optical system in a copying machine.
• Industrial machines or products employing 3-phase stepping motor driving.
Features
• Number of motor revolution can be controlled by the frequency of external clock input.
• 4 types of modes, i.e., 2, 2-3, W2-3 and 2W2-3-phase excitations, are available which can be selected based on rising
of clock signals, by switching highs and lows of Mode A and Mode B terminals.
• Setting a Mode C terminal low allows an excitation mode that is based on rising and falling of a clock signal.
By setting the Mode C terminal low, phases that are set only by Mode A and Mode B can be changed to other phases
as follows without changing the number of motor revolution: 2-phase may be switched to 2-3-phase; 2-3-phase may
be switched to W2-3-phase; and W2-3-phase may be switched to 2W2-3-phase.
• Phase is maintained even when the excitation mode is changed.
Continued on next page.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
62911HKPC 5-7063/42011HKIM/71608HKIM No.A1137-1/15
STK673-011-E
Continued from preceding page.
• An MOI output terminal which outputs 1 pulse per 1 cycle of phase current.
• A CW/CCW terminal which switches the rotational direction.
• A Hold terminal which temporarily holds the motor in a state where the phase current is conducted.
• An Enable terminal which can forcibly turns OFF a MOSFET of a 6 output driving element in normal operation.
• Schmitt inputs with built-in pull-up resistor (20kΩ typ)
• Motor current can be set by changing the voltage of the Vref terminal (0.63V per 1A, dealing as much as 0 to
1/2VCC2 (4A)).
• The clock input for controlling the number of motor revolution lies in a range of 0 to 50kHz.
• Supply voltage: VCC1 = 16 to 30V, VCC2 = 5.0V ±5%
• A built-in current detection resistor (0.227Ω)
• A motor current during revolution can deal with as high as 2.4A at Tc = 105°C and as high as 4A at Tc = 50°C or
lower.
Specifications
Maximum Ratings at Tc = 25°C
Parameter
Symbol
Conditions
Maximum supply voltage 1
VCC1 max
VCC2 = 0V
Maximum supply voltage 2
VCC2 max
Ratings
Unit
36
V
No signal
-0.3 to +7.0
V
-0.3 to +7.0
V
4.0
A
105
°C
150
°C
-40 to +125
°C
Input voltage
VIN max
Logic input pins
Phase output current
IO max
VCC2 = 0V, CLOCK ≥ 100Hz
Operating substrate temperature
Tc max
Junction temperature
Tj max
Storage temperature
Tstg
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Operating supply voltage 1
VCC1
With signal
16 to 30
V
Operating supply voltage 2
VCC2
With signal
5.0V ± 5%
V
Input voltage
VIH
0 to VCC2
V
Phase output current 1
IO1
Without heat sink
1.7
A
Phase output current 2
IO2
Tc = 105°C
2.4
Clock frequency
fCL
Pin 11 input frequency
0 to 50
A
kHz
Electrical Characteristics 1 at Tc = 25°C, VCC1 = 24V, VCC2 = 5V
Parameters
Symbol
Rating
Conditions
min
VCC2 supply current
Effective output current
ICCO
Ioave
Enable=Low
Each phase R/L=2Ω /6mH
2W2-3-phase excitation Vref = 0.61V
FET diode forward voltage
Vdf
If= 1A (RL=23Ω)
Output saturation voltage
Vsat
RL = 23Ω
Output leakage current
IOL
RL = 23Ω
Input high voltage
VIH
9 terminals, Pins 11 to 18, 22
Input low voltage
VIL
9 terminals, Pins 11 to 18, 22
Input current
Vref input voltage
Vref input current
IIL
VrH
Ir
Pins 11 to 18 pin = GND level
pull-up resistance 20kΩ (typ)
Pin 10
0.62
115
2.5
Pin 20, pin 20 to 19 = 820Ω
MOI output low voltage
VOL
Pin 20, pin 21 to 20 = 1.6kΩ
fc
6.1
12
0.69
0.76
mA
Arms
1.0
1.6
V
0.45
0.56
V
0.1
mA
V
250
0
440
VOH
unit
max
4.0
Pin 10, pin 10 = 2.5V
MOI output high voltage
PWM frequency
typ
625
1.0
V
550
μA
VCC2/2
V
810
μA
V
0.4
63
V
kHz
Note: Constant voltage supply is used as power supply.
No.A1137-2/15
STK673-011-E
Electrical Characteristics 2 at Tc = 25°C, VCC1 = 24V, VCC2 = 5V
Current division ratio at phase current of 1/4 electrorotation, in each excitation mode (unit = %, typ.) Number of current
division is put in parentheses.
Current division
2 phase (1)
2-3 phase (3)
W2-3 phase (6)
1/96
0
2/96
0
13
0
3/96
2W2-3 phase (12)
4/96
0
5/96
26
26
6/96
38
7/96
8/96
50
9/96
50
50
10/96
61
11/96
12/96
71
13/96
71
14/96
79
15/96
16/96
87
100
17/96
87
87
18/96
92
19/96
20/96
96
21/96
96
22/96
100
23/96
98
100
24/96
100
Note: Constant voltage supply is used as power supply.
Electrical Characteristic 2 represents design values. Measurement for controlling the standard value is not
conducted.
Package Dimensions
unit:mm (typ)
64.0
1
28
0.5
2.0
27 2.0=54.0
5.0
0.5
32.0
8.5
0.4
2.9
No.A1137-3/15
STK673-011-E
Equivalent Block Diagram
8 VCC1A
7 VZ
Charging pump
GND2 9
VCC2(5V) 21
Clock
Mode A
Mode B
Mode C
TU
11
12
13
18
22
Hold
CW / CCW
Enable
Reset
MOI
14
15
16
17
20
F1, F2, F3 current detection
Time
chart
generation
F1, F2, F3
PWM
control
F1
F2
F3
4
23
6
24
5
25
F4, F5, F6
PWM
control
F4
F5
Vref 10
Reference clock
CR oscillator
1 VCC1B
2 VCC1C
VCC side
level shift
Step switching
of
ref. voltage
for
setting current
UO
UI
VO
VI
WO
WI
F6
F4, F5, F6 current detection
GND side
level shift
27 P. GNDA
28 P. GNDB
SUB
GND1 19
ITF00807
Sample Application Circuit
STK673-011-E
7
8
1
2
11
12
13
18
22
14
15
16
17
20
Clock
Mode A
Mode B
Mode C
TU
Hold
CW / CCW
Enable
Reset
MOI
4
23
6
24
R01
Vref
C4
10μF
+
+
C2
2.2μF
21
VCC2(5V)
R02
10
19
C3
0.1μF
5
25
9
27 28
VCC1
16 to 30V
U
V
3-phase stepping motor
W
C5
0.01μF
+
C1
220μF
P. GND
ITF00808
No.A1137-4/15
STK673-011-E
Set Equation of Output Current IO Peak Value
IO peak = Vref ÷ K K = 0.63 (V/A)
Vref ≤ 0.5 × VCC2
Vref = VCC2 × Rox ÷ (R01 + Rox)
Rox = (R02 × 4.0kΩ) ÷ (R02 + 4.0kΩ)
• R02 is preferably set to be 100Ω in order to minimize the effect of the internal impedance (4.0kΩ ±30%) of
STK673-011-E
• For noise reduction in 5V system, put the GND side of bypass capacitor (220μF) of VCC1 (shown in a thick line in
the above Sample Application Circuit) in the vicinity of pins 27 and 28 of the hybrid IC.
• Set the capacitance value of the bypass capacitor C1 such that a ripple current of a capacitance, which varies in
accordance with the increase of motor current, lies in an allowable range.
• K in the above-mentioned set equation varies within ±5 to ±10% depending on the inductance L and resistance value
R of the used motor. Check the peak value setting of IO upon actual setting.
where
Input/Output Terminals Functions of 5V System
Terminal name
No.
Conditions upon Functioning
Function
0 = Low, 1 = High
Basic clock for switching phase current of motor
Rising edge in Mode C = 1
Input frequency range: DC to 50kHz
Rising and falling edge in Mode C = 0
Clock
11
Mode A
12
Sets excitation mode
See table listed below
Mode B
13
Sets excitation mode
See table listed below
Mode C
18
Sets excitation mode
See table listed below
Sets excitation mode
See table listed below
TU
22
Switches 2-3 phase excitation of step current to rectangular current
Hold
14
Temporarily holds the motor in a state
0
CW/CCW
15
Switches the rotational direction of the motor
1 = CW, 0 = CCW
Enable
16
Turns OFF all of the driving MOSFET
0
Reset
17
System reset Make sure to input a reset signal of 10μs or more
0
MOI
20
Monitors the number of revolution of the motor
Vref
10
Sets the peak value of the motor current set at 0.63V per 1A
Minimum pulse width: 10μs
High level duty: 40 to 60%
More effective in increasing torque than in lowering vibration of motor
Outputs 1 pulse of a high level signal per
one cycle of phase current
Maximum value 0.5 × VCC2 (4A max)
Excitation Mode Table
Input condition
Excitation No.
Excitation Mode
Number of current
steps
Number of clock pulse
per one cycle of
Mode A
Mode B
Mode C
TU
0
0
1
1
(1)
2-phase
1
6
0
1
1
1
(2)
2-3-phase
3
12
0
1
1
0
(3)
2-3-phase TU
1
12
1
0
1
1
(4)
W2-3-phase
6
24
1
1
1
1
(5)
2W2-3-phase
12
48
0
0
0
1
(6)
2-3-phase
3
6
phase current
0
0
0
0
(7)
2-3-phase TU
1
6
0
1
0
1
(8)
W2-3-phase
6
12
1
0
0
1
(9)
2W2-3-phase
12
24
As shown in the table, TU terminal is only effective for Excitation Nos. (3) and (7).
Although the present hybrid IC is not damaged even when TU = 0 is mistakenly input in Excitation, other than
Excitation Nos. (3) and (7), motor vibration or motor current may increase.
* Timing charts for 3-phase stepping motor driver is illustrated on pages 9 to 13 for exemplary operations of Enable
Hold, CW/CCW for Excitation Nos. (1), (2), (3), (4), (5) and (9), and Excitation No. (4).
No.A1137-5/15
STK673-011-E
Notes On Use
(1) Input terminal use of 5V system
[RESET and Clock (timing of input signal upon rising of power supply)]
The driver is configured to include a 5V system logic section and a 24V MOSFETs section. The MOSFETs on both
VCC1 side and GND side are N-channels. Thus, the MOSFETs on the VCC1 side is provided with a charging pump
circuit for generating a voltage higher than that of VCC1. When a Low signal is input to a RESET terminal for
operating the RESET, the charging pump is stopped. After the release of the RESET (High input), it requires a period of
1.7ms to rise the charging pump. Accordingly, even when a Clock signal is input during the rising of the charging pump
circuit, the MOSFET cannot be operated. Such a timing needs to be taken into consideration for inputting a Clock signal.
An example of timing is shown in Figure 1.
Rising of 5V power supply
RESET signal input
Clock signal
> 10μs
> 1.7ms
ITF00809
Figure 1. Timing chart of RESET signal and Clock signal
When the RESET terminal switches from Low to High where a High period is 1.7ms or longer and the Clock input is
conducted in a Low state, each phase current of the motor is maintained at the following values.
Phase
Current in the case where the initial Clock signal is maintained
Current in the case where the initial Clock signal is maintained
at Low level (Other than 2-3-phase TU excitation)
at Low level (2-3-phase TU excitation)
U phase
0
0
V phase
-87% of peak current during normal rotation
-100% of peak current during normal rotation
W phase
+87% of peak current during normal rotation
+100% of peak current during normal rotation
Refer to the timing charts for operations.
[Clock]
Clock signals should be input under the following conditions so that all 9 types of excitation modes shown in the
Excitation Mode Table.
Input frequency range DC to 50kHz
Minimum pulse width 10μs
High level duty
40 to 60%
When Mode C is not used, it is an operation based on rising of the Clock and thus the above-mentioned condition of
high level duty is negligible. A minimum pulse width of 10μs or more allows excitation operation by Mode A and
Mode B. Since the operation is based on rising and falling of the Clock under the use of Mode C, it is most preferable to
set the high level duty to 50% so as to obtain uniform step-wise current widths.
[Mode A, Mode B, Mode C and TU]
These 4 terminals allow selection of excitation modes. For specific operations, refer to Excitation Mode Table and
Timing Charts.
No.A1137-6/15
STK673-011-E
[Hold, CW/CCW]
Hold temporary holds the motor while a phase current of the motor is conducted, even when there are clock inputs of
Low input.
High input releases the hold, and the motor current changes again synchronizing with the rising of Clock signals. Refer
to Timing Chart for exemplary operations.
CW/CCW switches the rotational direction of the motor. Switching to High gives a rotational operation of CW, and
Low gives a rotation operation of CCW. The timing of switching the rotation is synchronizes the rising of the clock
signals. Refer to Timing Chart for exemplary operations.
[Enable]
High input renders a normal operation and Low input forcibly renders a gate signal of MOSFETs Low, thereby cutting
a motor current. Once again High input renders a current to conduct in the motor. The timing of the current does not
synchronize with the clock.
Since Low input of Enable forcibly cuts the motor current, it can be used to cut a V-phase or W-phase while Clock is
maintained in a Low level state after the RESET operation.
Rising of 5V power supply
RESET signal input
Clock signal
> 10μs
Enable signal
> 1.7ms
> 10μs
ITF00810
Figure 2. Input timings of RESET signal, Enable signal and Clock signal
[Vref (Setting motor current peak value)]
A peak value of a motor current IO is determined by R01, R02, VCC2 (5V) and the following set equation (I).
Set equation of peak value of motor current IO
IO peak = Vref ÷ K
(I)
where
Vref ≤ 0.5 × VCC2 K = 0.63 (V/A)
Vref = VCC2 × Rox ÷ (R01 + Rox)
Rox = (R02 × 4.0kΩ) ÷ (R02 + 4.0kΩ)
• R02 is preferably set to be 100Ω in order to minimize the effect of the internal impedance (4.0kΩ ± 30%) of
STK673-011-E
• K in the above-mentioned set equation varies with in ±5 to ±10% depending on the inductance L and resistance value
R of the used motor. Check the peak value setting of IO upon actual setting.
* Refer to Figure 4 for an example of Vref-IO characteristics
(2) Allowable operating ranges of motor current
Set the peak value of the motor current IO so as to lie within a region below the curve shown in Figure 5 on page 13.
When the operation substrate temperature Tc is set to 105°C, IO max should be 2.4A or lower and a Hold operation
should be conducted where IO max is 2.0A or lower.
For operation where Tc = 50°C, IO max should be 4.0A or lower and a Hold operation should be conducted where
IO max is 3.3A or lower.
No.A1137-7/15
STK673-011-E
(3) Heat Radiation Design
Heat radiation design for reducing the operation substrate temperature of the hybrid IC is effective in enhancing the
quality of the hybrid IC.
The size of a heat sink varies depending on the average power loss Pd in the hybrid IC. As shown in Figure 6 on
page 13, Pd increases in accordance with the increase of the output current.
Since the starting current and the stationary current coexist in an actual motor operation, Pd cannot be obtained only
from the data shown in Figure 6. Therefore, Pd is obtained assuming that the timing of the actual motor operation is
a repeated operation shown in the following Figure 3.
T1
T2
T1: Starting time of positive rotation
IO1
Positive rotation
current
T2: Stationary time of positive rotation
T4
T3
T3: Starting time of reverse rotation
IO2
T4: Stationary time of reverse rotation
0
IO3
T0: One cycle time of repeated motor
operation
P1: Pd of IO1
Reverse rotation
current
P2: Pd of IO2
T0
P3: Pd of IO3
IO4
P4: Pd of IO4
ITF00811
Figure 3. Timing Chart of Motor Operation
The average power loss Pd in the hybrid IC upon an operation shown in Figure 3 can be obtained by the following
equation (II):
Pd = (T1 × P1 + T1 × P2 + T3 × P3 + T4 × P4) ÷ T0 (II)
When the value obtained by the above equation (II) is equal to or less than 3.4W and the ambient temperature Ta is
equal to or lower than 60°C, there is no need of providing a heat sink.
Refer to Figure 7 for data of the operation substrate temperature when no heat sink is used.
The size of the heat sink can be decided depending on θc-a obtained by the following equation (III) and from Figure 8.
θc-a = (Tc max – Ta) ÷ Pd
(III)
where Tc max: Maximum operation substrate temperature = 105°C
Ta: Ambient temperature of hybrid IC
Although heat radiation design can be realized by following the above equations (II) and (III), make sure to check that
the substrate temperature Tc is equal to or lower than 105°C after mounting the hybrid IC into a set.
No.A1137-8/15
STK673-011-E
Timing Chart of 3-phase Stepping Motor Driver
2-phase excitation
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00812
2-3 phase excitation
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00813
No.A1137-9/15
STK673-011-E
2-3 phase excitation TU
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00814
W2-3 phase excitation
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00815
No.A1137-10/15
STK673-011-E
2W2-3 phase excitation
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00816
W2-3 phase excitation (Enable operation)
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00817
No.A1137-11/15
STK673-011-E
W2-3 phase excitation (Hold operation)
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00818
W2-3 phase excitation (CW/CCW operation)
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00819
No.A1137-12/15
STK673-011-E
W2-3 phase excitation to 2W2-3 phase excitation (Mode C operation)
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
ITF00820
Vref - IO
Figure 4
VCC1=24V, VCC2=5V, Clock=1kHz,
continuous operation of
W2-3 phase excitation star connection line load
Line R=1.8Ω, L=4mH
2.5
Ro
tat
ion
at
Cl
oc
k≥
10
Ho
0H
ld
z
4.0
4.0A
3.5
2.0
1.5
1.0
3.3A
3.0
2.5
2.4A
2.0
2.0A
1.5
1.0
0.5
0.5
0
Tc=
105°C
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Motor current I O (peak value of stepping current) - A
PD - IO
Figure 6
18
4.0
14
12
TYP value data
10
8
6
4
2
0
20
40
60
80
100
Operating substrate temperature, Tc - °C
ΔTc - Pc
Figure 7
90
VCC1=24V, VCC2=5V, Clock=1kHz,
continuous operation of
W2-3 phase excitation star connection line load
Line R=1.8Ω, L=4mH
16
0
ITF00821
Substrate temperature rise, ΔTc - °C
Hybrid IC's internal average power loss, PD - W
IO -- Tc
Figure 5
4.5
Motor current, IO - A
Motor current setting voltage, Vref - V
3.0
120
ITF00822
With out heat sink
longitudinal self-cooling
80
70
60
50
40
30
20
10
0
0
0.5
1.0
1.5
2.0
2.5
Motor current, IO - A
3.0
3.5
4.0
ITF00823
0
1
2
3
4
5
6
Hybrid IC's internal average power loss, Pc - W
7
ITF00824
No.A1137-13/15
STK673-011-E
7
5
3
2
10
no s
urfa
ce c
oati
blac
ng
k su
rfac
e co
at
7
5
3
2
1.0
2.5
2.0
C
5°
10
=
C
5°
Tc
=2
Tc
1.5
1.0
0.5
0
2
10
3
5
7
2
100
3
5
7
Heat sink surface, S - cm2
2.5
0
1000
2
3
4
5
Output current, IO - A
Vdf - If
Figure 10
1
ITF00825
ITF00826
IIL - VIL
Figure 11
500
450
Input current 11 to 18 pin, IIL - μA
Diode forward voltage F1 to F6, Vdf - V
Vst - IO
Figure 9
3.0
Output saturation voltage, Vst - V
Heat sink thermal resistance, θc-a - °C/W
θc-a - S
Figure 8
100
2.0
1.5
5°C
=2
Tc
C
05°
=1
c
T
1.0
0.5
400
350
300
250
Tc=25°C
200
Tc=105°C
150
100
50
0
0
0
1
2
3
4
5
Diode forward current, If - A
1000
0
1.0
1.5
2.0
2.5
3.0
Input voltage, VIL - V
Ir - VrH
Figure 12
0.5
ITF00827
VOH - IOH
Figure 13
5.0
ITF00828
MOI output high voltage, VOL - V
4.5
Vref input current, Ir - μA
800
600
5°C
=2
Tc
°C
105
Tc=
400
200
4.0
Tc=
3.5
Tc=
25°
C
105
°C
3.0
2.5
2.0
1.5
1.0
0.5
0
0
0
0.5
1.0
1.5
2.0
2.5
3.0
Vref input voltage, VrH - V
VOL - IOL
Figure 14
0.6
MOI output low voltage, VOL - V
ITF00829
0
1
2
3
4
5
6
7
8
20 pins output current, IOH - mA
9
10
ITF00830
0.5
°C
05
=1
c
T
0.4
5°C
=2
Tc
0.3
0.2
0.1
0
0
1
2
3
4
5
6
7
20 pins output current, IOL - mA
8
9
10
ITF00831
No.A1137-14/15
STK673-011-E
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PS No.A1137-15/15