Si9113 Datasheet

End of Life. Last Available Purchase Date is 31-Dec-2014
Si9113
Vishay Siliconix
High-Voltage Current Mode PWM Controller for
ISDN Power Supplies
FEATURES
BiC/DMOS Technology
Current Mode Control
Max 50% Duty Cycle Operation
1.3-MHz Error Amp
Up to 500-kHz Internal Oscillator
Soft-Start
0.6-V Fast Over-Current Protection
<5- A Supply Current for +VIN <18 V
23.5-V to 200-V Input Voltage Range
Programmable Start/Stop Capability
Internal Start-Up Circuit
Power_Good Output
DESCRIPTION
Si9113 is a current mode PWM controller for ISDN power
supplies. In a 14-pin SOIC package, it provides all necessary
functions to implement a single-switch PWM with a minimum
of external parts. To maximize the circuit integration, the
Si9113 is designed with a 200-V depletion mode MOSFET
capable of powering directly off the high input bus without an
external start-up circuit. The Start and Stop input voltage
thresholds can be programmed within the operating input
voltage range by means of a resistor divider, provided +VIN
(Start) > +VIN (Stop). The internal clock frequency is set with
a single external resistor and is capable of capacitor-coupled
external synchronization. In order to satisfy the stringent
ambient temperature requirements, the Si9113 is rated to
handle the industrial range of −40 C to 85 C.
The Si9113 is available in both standard and lead (Pb)-free
packages.
FUNCTIONAL BLOCK DIAGRAM
VIN (23.5 V to 200 V)
VOUT
Start-Up
Drive
Current
Stop/Start
Power_Good
VREF = 1.3 V
Comparator
Fast
Current
Limit
Comparator
.
See Detailed Block Diagram, page 7
Applications information see AN728.
A Demonstration Borad data sheet is available for this product.
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
www.vishay.com
1
Si9113
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 V
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V
Power Dissipation (Package)a
14-Pin SOIC (Y Suffix)b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mW
Logic Inputs (OSC IN, OSC OUT, PWR_GOOD) . . . −0.3 V to VCC + 0.3 V
or "10 mA
Linear Inputs (FB, VREF, SENSE, SS) . . . . . . . . . . . . −0.3 V to VCC + 0.3 V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150_C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to 85_C
Thermal Impedance (QJA)
14-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140_C/W
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 7.2 mW/_C above 25_C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE
VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.5 V to 200 V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V to 14 V
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to VCC
Linear Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to VCC − 3 V
FOSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 kHz to 500 kHz
SPECIFICATIONSa
Limits
Test Conditions
Unless Otherwise Specified
p
−40 to 85_C
Symbol
VCC = 10 V, +VIN = 48 V, ROSC = 390 kW
Tempb
Minc
Typd
Maxc
Unit
Output Voltage
VREF
OSCIN = − VIN (OSC Disabled)
RL = 10 MW
Room
Full
1.275
1.26
1.3
1.3
1.325
1.34
V
Short Circuit Current
ISREF
VREF = −VIN
Room
−25
−10
mA
IREF = 0 to −0.5 mA
Full
"10
40
VCC = 10 to 14 V
Full
"2
5
VUVSTART
Turn-On
Full
8.10
8.8
9.50
VUVSTOP
Turn-Off
Full
8.10
8.8
9.50
Parameter
Reference
Load Regulation
Line Regulation
DVREF
mV
UVLO
Under Voltage Lockout
Input Bias Current
ISTART
ISTOP
VSTOP = 8 V,
V VSTART = 8 V
Room
0.05
Room
0.05
Pre-Regulated VCC
VREG
Room
8.5
9.0
9.5
UVLO for VCC
VCCUV
Room
7.9
8.4
8.9
VREG − VCCUV
VD
Room
0.3
0.6
V
mA
V
PWR_Good Comparator
Rise Time
trpg
Fall Time
tfpg
Output Logic Low
CPWR_Good
PWR G d = 100 nF
ISINK = 2.5 mA
Room
35
Room
25
Room
0.4
mS
mS
0.8
V
Soft-Start
SS Current
ISS
Room
11
mA
Output Inhibit Voltage
VSS
Room
3.3
V
Oscillator
Maximum Frequencye
fMAX
Initial Accuracy
fOSC
Voltage Stability
Df/f
Temperature
Coefficiente
Maximum Duty Cycle
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2
ROSC = 0
Room
ROSC = 390 k (Note f)
Room
80
100
120
ROSC = 180 k (Note f)
Room
160
200
240
Df/f = (f [14 V] − f [10 V]) / f [10 V]
Room
10
15
%
Full
450
650
ppm/_C
fOSC = 100 kHz
Room
50
TOSC
DMAX
500
kHz
%
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
Si9113
Vishay Siliconix
SPECIFICATIONSa
Limits
Test Conditions
Unless Otherwise Specified
−40 to 85_C
Symbol
VCC = 10 V, +VIN = 48 V, ROSC = 390 kW
Tempb
Minc
Typd
Open Loop Voltage Gaine
AVOL
OSC IN = − VIN
Room
50
60
Input BIAS Current
IBIAS
VFB = 1.3 V
Room
−1
VFB
FB Tied to COMP, OSC IN = − VIN
Full
1.28
Parameter
Maxc
Unit
Error Amplifier
Feedback Input Voltage
Dynamic Output Impedancee
ZOUT
Room
Unity Gain Bandwidthe
BW
Room
Output Current
IOUT
Power Supply Rejectione
1
1
1.3
Source VFB = 0.8 V
Room
Sink VFB = 1.8 V
Room
0.12
0.15
Room
50
70
0.5
PSRR
dB
1
−5
mA
1.32
V
2
kW
MHz
−1
mA
dB
Current Limit Comparator
Threshold Voltage
VSOURCE
VFB = 0 V
Full
td
VSENSE = 0.85 V, See Figure 1
Full
Output High Voltage
VOH
IOUT = −10 mA
Room
Full
Output Low Voltage
VOL
IOUT = 10 mA
Room
Full
Delay to Outpute
0.6
0.7
V
100
150
ns
Output Drive
Rise Time
tr
Fall Time
tf
CL = 500 pF
(10% to 90%)
9.7
9.5
0.3
0.5
Room
40
75
Room
40
75
V
ns
Supply
ICC
VCC = 10 V, ROSC = 390 kW
VUVUP vVIN v 200 V
Full
1
1.4
IVIN
Excluding I From Resistive Divider of
Stop and Start Pins
Room
75
100
IVIN
+VIN v 18 V, VSTART (Pin 14) < 8.8 V
Room
2
5
Supply Current
Supply Current UVLO Mode
mA
mA
Notes
a. Refer to PROCESS OPTION FLOWCHART for additional information.
b. Room = 25_C, Full = −40 to 85_C.
c. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
d. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
e. Guaranteed by design, not subject to production test.
f.
CSTRAY Pin 8 = v 5 pF.
TIMING WAVEFORMS
SENSE
0
VCC
0.85 V −
50%
tr v 10 ns
td
90%
OUTPUT
0 −
FIGURE 1. Delay Time for Current Sense
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
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Si9113
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
VREF vs. Temperature (VIN = 48 V)
1.306
1.302
VUVSTART /VUVSTOP (v)
VREF − (V)
9.0
VCC = 14 V
1.304
VCC = 12 V
VCC = 10 V
1.300
VUVSTART/VUVSTOP vs. Temperature
9.1
8.9
8.8
8.7
8.6
8.5
1.298
−50
−25
0
25
50
75
8.4
−50
100
−25
0
50
75
100
Temperature (_C)
Temperature (_C)
Output Frequency vs. Oscillator Resistance
Supply Current vs. Output Frequency
2.0
300
1.6
VCC = 10 V
VCC = 14 V
I CC (mA)
FOUT (kHz)
25
100
1.2
VCC = 10 V
VCC = 12 V
0.8
0.4
0.0
10
10
100
1000
0
2000
50
100
FOSC (kW)
Output Frequency vs. Supply Voltage
200
250
300
Soft-Start Current vs. Temperature
24
13
ROSC = 1 MW
12
22
85_C
VCC = 10 V
11
25_C
20
−40_C
I SS ( m A)
FOUT (kHz)
150
FOUT (kHz)
18
10
9
16
8
14
9
10
11
12
VCC (V)
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4
13
14
15
7
−40
−20
0
20
40
60
80
100
Temperature (_C)
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
Si9113
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
UVLO Supply Current vs. VIN
10
Output Rise Time vs. Load
80
VCC = 10 V
60
Rise/Fall Time (nS)
I IN ( (mA)
85_C
1
25_C
40
20
−40_C
0
0.1
11
13
15
17
19
0
21
200
VIN (V)
400
600
800
COUT (pF)
Efficiency vs. Output Power
90
VIN = 28 V
80
Efficiency (%)
70
VIN = 48 V
60
VIN = 99 V
50
40
30
20
10
0
200
400
600
800
1000
WO (mW)
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
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Si9113
Vishay Siliconix
PIN CONFIGURATION
SOIC-14
STOP
1
14 START
VIN
2
13 COMP
SENSE
3
PWR_GOOD
4
−VIN
12 FB
ORDERING INFORMATION
Part Number
11 VREF
Si9113DY
5
10 SS
Si9113DY-T1
DRIVER
6
9
OSCOUT
VCC
7
8
OSCIN
Si9113
Temperature Range
Bulk
−40 to 85_C
Tape and Reel
Si9113DY-T1—E3
Top View
Package
Eval Kit
Temperature Range
Board Type
−10
10 to 70_C
Surface Mount and
Thru-Hole
Si9113D1
Si9113D2
PIN DESCRIPTION
Pin Number
Name
1
STOP
2
+VIN
3
SENSE
4
PWR_GOOD
5
−VIN
6
DRIVER
7
VCC
8
OSCIN
9
OSCOUT
10
SS
11
VREF
12
FB
Set up the stop threshold of +VIN for VCC via resistive dividers
Input voltage to UVLO and Start-Up circuitry
Current sense amplifier input for current mode control and OCP.
Logic high PWR_Good signal indicates FB voltage is within regulation.
Ground pin
MOSFET gate drive signal.
Supply voltage to internal circuitry and MOSFET gate drive.
ROSC terminal
ROSC terminal, square waveform output
Soft-Start, time programmed by capacitor value.
1.3-V reference. Decoupled with 0.1-mF capacitor.
Inverting input of an error amplifier.
13
COMP
Error amplifier output for external compensation network.
14
START
Set up the start threshold of +VIN for VCC via resistive dividers
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Function
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
Si9113
Vishay Siliconix
DETAILED BLOCK DIAGRAM
8
COMP
13
9
VCC
OSCIN
OSCOUT
OSC
PWR_GOOD
FB
VREF
4
Error
Amplifier
12
−
11
Clock (1/2 fOSC)
3.6 V
+ −
+
−
PWM
Comparator
R
+
Q
MOS Driver
S
SS
6
+
Ref
Gen
−
10
C/L
Comparator
5
VIN
STOP
START
−VIN
0.6 V
3
VCC
DRIVER
SENSE
7
2
1
14
Programmable
Start/Stop
Circuit
Enable
Start-Up
Pre-Regulator
DETAILED DESCRIPTION
Start-Up
The Si9113 start-up circuit prevents the internal circuits from
turning on until the voltage on the +VIN pin, via the resistor
divider R3, R4, R5, is sufficiently positive such that the voltage
across R3 (VSTART) is >8.8 V (typical value for the internal
reference VUVSTART [see Figure 2]). When this occurs, the
internal 1.3-V reference, soft-start and oscillator circuits are
enabled. A constant current source provides the current to the
external soft-start capacitor, which allows the output voltage to
rise gradually without overshoot. The output drive circuit is
disabled until the soft-start voltage reaches 3.3 V. The
controller is continuously powered in the state until the VIN
voltage falls and VSTOP drops below 8.8 V (the typical value for
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
the internal reference VUVSTOP). The user can program the
+VIN START and +VIN STOP voltage with the external resistor
divider R3−R5 (see Figure 2) as follows:
VIN(START) +
VIN(STOP) +
ǒ
R3 ) R4 ) R5
R5
ǒ
R3 ) R5
R5
Ǔ
Ǔ
VUVSTART
VUVSTOP
(1)
(2)
Since VUVSTART = VUVSTOP = 8.8 V (typical) the hysteresis
voltage can be expressed as:
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Si9113
Vishay Siliconix
DVIN +
ǒ Ǔ
R4
R5
VUVSTART
(3)
VCC Circuit
The depletion MOSFET process allows the Si9113 controller
to power directly from the high input bus voltage. Once
VUVSTART is met, the pre-regulator start-up circuit generates
the 9.0-V VCC voltage. The VCC voltage is used internally to
power the IC as well as providing the drive current for the
external MOSFET. An internal VCC circuit is disabled once a
higher external voltage (X10 V) is applied to this pin. If VCC is
below VCCUV, the Si9113 will inhibit the driver output switching.
period eliminating any chance of undesirable noise frequency.
When the output load current decreases to 0 A, the controller
is forced to enter the pulse skipping mode. This is a natural
phenomenal for all controllers since the duty cycle cannot
decrease linearly to 0%.
Error Amplifier
The reference voltage of Si9113 is set at 1.3 V. The reference
voltage is internally connected to the non-inverting input of
error amplifier. The reference is decoupled with 0.1-mF
capacitor.
The error amplifier gain-bandwidth product and slew rate are
critical parameters which determine the transient response of
converter. The transient response is the function of both small
and large signal responses. The small signal response is
determined by the converter closed loop bandwidth and phase
margin while the large signal is determined by the error
amplifier dv/dt and the inductor di/dt slew rate. Besides the
inductance value, the error amplifier determines the converter
response time. In order to minimize the response time, the
Si9113 is designed with 1.3-MHz error amplifier
gain-bandwidth product to generate the widest converter
bandwidth.
Soft-Start
Current Limit
The soft-start circuit provides a constant 10-mA current to
external capacitor attached to SS pin. A constant soft-start
current forces a gradual increase in duty cycle which in turn
ensures gradual output voltage rise without overshooting. The
soft-start time is programmed by the capacitance value.
Over current protection circuit is provided by monitoring the
voltage on the Sense pin. Once the current sense voltage
reaches 0.6V peak, the output drive stage is disabled for the
remainder of the clock cycle.
REF
Power_Good Comparator
Oscillator
The oscillator consists of a ring of CMOS inverters, capacitors,
and a capacitor discharge switch. An external resistor, ROSC,
between the OSCIN and OSCOUT pins sets the frequency. The
maximum frequency is obtained when ROSC = 0 W. A
frequency divider in the logic section limits the switch duty
cycle to 50% by locking the switching frequency to one-half of
the oscillator frequency.
The PWR_Good signal indicates the status of output voltage.
If the output voltage and VCC are within regulation, the
PWR_Good signal generates a logic high output by monitoring
the voltage on COMP and VCC pins. If either one is out of
regulation, a logic low PWR_Good signal is generated. The
capacitor at the PWR_Good pin determines the rise time of the
power good signal, once all the conditions are met for power
good. The PWR_Good signal is an open collector output
capable of sinking 2.5 mA.
PWM Mode
As the load and line voltage vary, the switching frequency
remains constant. The switching frequency is programmed by
the ROSC value as shown by the oscillator curve. In the PWM
mode, a duty cycle pulse is generated for each switching
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MOSFET Gate Drive
The DRIVER pin is designed to drive the low-side n-channel
MOSFET. Typically, the driver stage is sized to sink and source
200-mA of peak current when VCC = 12 V.
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
Si9113
Vishay Siliconix
TYPICAL APPLICATION CIRCUITS
28 − 99 V
+VIN
4
3
−VIN
T1
XFMR_EPC17
BR1
AC +
AC −
+ C1
22 mF
160 V
2
DF02S
ESIG
C4
1 mF
R13
D1
2.7 W
ESIG
3.3 V
C10
220 mF
10 V
C10
NS2
2.2 mF
50 V
3
6
7
D3
C12
0.1 mF
C5
0.1 mF
R9
20 kW
NS3
9
3
+
D4*
BZX84C43
1
COM2
NP
5
B130LB
8
COM1
R1
R10
13 kW
40 V
D2
1
1
1 MW
C7
8
7
OSCIN
9
10
OSCOUT
DR
11
0.1 mF
12
13
14
R2
C8
300 kW 0.01 mF
R5
3.96 MW
3
VREF
PWR_G
FB
ICS
COMP
VIN
START
STOP
Q01 Si3420DV
4
GND
Si9113
C3
100 pF
6
5
SS
0.001 mF
C6
1, 2, 5, 6
VCC
4
3
R11
2
1 kW
C9
220 pF
1
R7
2W
1/ W
2
R3
5.1 MW
R4
1 MW
*Optional
FIGURE 2. Dual Output Flyback Converter with 2% Regulation for 3.3 V
( As used on Demo Board—DB1)
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
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Si9113
Vishay Siliconix
TYPICAL APPLICATION CIRCUITS
28 − 99 V
+VIN
4
3
−VIN
T1
XFMR_EPC17
BR1
AC +
AC −
+ C1
22 mF
160 V
2
DF02S
40 V
D2
4
1
ESIG
R13
2.7 W
R9
89 kW
R10
C4
1 mF
D1
5
ESIG 8
NP
1 MW
C7
8
7
OSCIN
9
10
VCC
OSCOUT
DR
B130LB
NS1
1
6
C11
220 mF
10 V
11
0.1 mF
12
13
14
R2
C8
300 kW 0.01 mF
PWR_G
FB
ICS
COMP
VIN
START
STOP
Si9113
C3
100 pF
R5
3.96 MW
C5
0.1 mF
C12
0.1 mF
1, 2, 5, 6
3
Q01 Si3420DV
4
GND
VREF
+
COM1
5
SS
0.001 mF
C6
6
D4*
BZX84C43
COM2
1
3.3 V
12.7 kW
R1
+
D3
2
9
NS3
3
C10
NS2
2.2 mF
50 V
3
4
3
R11
2
1 kW
C9
470 pF
1
R7
2W
1/ W
2
R3
5.1 MW
R4
1 MW
*Optional
FIGURE 3. Dual Output Flyback Converter with Moderately Regulated Outputs
(As used on Demo Board DB-2)
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10
Document Number: 71093
S-40746—Rev. B. 19-Apr-04
Package Information
Vishay Siliconix
SOIC (NARROW): 14-LEAD (POWER IC ONLY)
MILLIMETERS
14
13
12
11
10
9
Dim
A
A1
B
C
D
E
e
H
L
Ø
8
E
2
3
4
5
6
7
D
A
e
B
Document Number: 72809
28-Jan-04
A1
0.25
(GAGE PLANE)
1
H
INCHES
Min
Max
Min
Max
1.35
1.75
0.053
0.069
0.10
0.20
0.004
0.008
0.38
0.51
0.015
0.020
0.18
0.23
0.007
0.009
8.55
8.75
0.336
0.344
3.8
4.00
0.149
0.157
1.27 BSC
0.050 BSC
5.80
6.20
0.228
0.244
0.50
0.93
0.020
0.037
0_
8_
0_
8_
ECN: S-40080—Rev. A, 02-Feb-04
DWG: 5914
C
ALL LEADS
L
Ø
0.101 mm
0.004″
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1
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product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please
contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council
of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free
requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference
to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21
conform to JEDEC JS709A standards.
Revision: 02-Oct-12
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Document Number: 91000