PUBLIC
PRODUCT
TABLE
OF CONTENTS
SPECIFICATION
Prepared (Subject resp)
1/1301-BMR803 Technical Specification
00152-BMR803
jidgezou George Zou
Approved (Document resp)
PUC-1BGeorge
series Zou
DC/DC Converters
jidgezou
1 (1)
(4)
No.
Checked
Isolated 1W Unregulated Single/Dual Output
Date
Rev
3/15/2023
10/9/2020
28701-BMR803
E
B
Z Rev. G
March 2023
© Flex
Key Features
• Industry standard SIP-7 package
19.7 x 7.1 x 11.5 mm (0.77 x 0.28 x 0.45 in)
• High efficiency, typ. 80% at 15VO full load
• 6000 Vdc input to output isolation
• Reinforced Insulation, rated for max. 300 Vrms working
voltage
• Wide operating temperature from -40°C to 100°C
• No minimum load required
• Output short-circuit protection
• 5 V, 12 V, 15 V & 24 V input
• 3.3 V, 5 V, 12 V & 15 V output
• MTBF 15 Mh
General Characteristics
• 1 Watt output power
• Safety Compliance to EN/UL 62368-1
• ISO 9001/14001 certified supplier
Safety Approvals
Design for Environment
Meets requirements in hightemperature lead-free soldering
processes.
Contents
Ordering Information
General Information
Safety Specification
Absolute Maximum Ratings
............................................................. 2
............................................................. 2
............................................................. 3
............................................................. 4
Electrical Specification
5-24 VI / 3.3-15 VO, 0.03-0.3 A / 1 W
PUC-1B Series ..................................... 5
EMC Specification
Operating Information
Thermal Consideration
Connections
Mechanical Information
Soldering Information
Delivery Information
Product Qualification Specification
........................................................... 11
........................................................... 12
........................................................... 13
........................................................... 13
........................................................... 14
........................................................... 15
........................................................... 15
........................................................... 16
2
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
1/1301-BMR803 Technical Specification
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PUC-1BGeorge
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DC/DC Converters
jidgezou
Checked
Date
Isolated 1W Unregulated Single/Dual Output
Ordering Information
Product
PUC0503S1B
PUC0505S1B
PUC0512S1B
PUC0505D1B
PUC0512D1B
PUC1203S1B
PUC1205S1B
PUC1212S1B
PUC1212D1B
PUC1505S1B
PUC2403S1B
PUC2405S1B
PUC2412S1B
PUC2415S1B
PUC2405D1B
PUC2412D1B
PUC2415D1B
2 (4)
No.
Nominal Input
5V
5V
5V
5V
5V
12 V
12 V
12 V
12 V
15 V
24 V
24 V
24 V
24 V
24 V
24 V
24 V
Output
3.3 V, 0.303 A / 1 W
5 V, 0.2 A / 1 W
12 V, 0.084 A / 1 W
±5 V, 0.1 A / 1 W
±12 V, 0.042 A / 1 W
3.3 V, 0.303 A / 1 W
5 V, 0.2 A / 1 W
12 V, 0.084 A / 1 W
±12 V, 0.042 A / 1 W
5 V, 0.2 A / 1 W
3.3 V, 0.303 A / 1 W
5 V, 0.2 A / 1 W
12 V, 0.084 A / 1 W
15 V, 0.067 A / 1 W
±5 V, 0.1 A / 1 W
±12 V, 0.042 A / 1 W
±15 V, 0.034 A / 1 W
Product number and Packaging
PUCX1X2X3X4X5X6n1n2n3*
Options
n1
Single/Dual output
ο
Rev
March 2023
28701-BMR803
E
Z Rev. G
© Flex
Mean steady-state failure rate, λ
MTBF
66.7 nFailures/h
15 Mh
Compatibility with RoHS requirements
The products are compatible with the relevant clauses and
requirements of the RoHS directive 2011/65/EU and have a
maximum concentration value of 0.1% by weight in
homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
homogeneous materials for cadmium.
Exemptions in the RoHS directive utilized in Flex products
are found in the Statement of Compliance document.
Flex fulfills and will continuously fulfill all its obligations
under regulation (EC) No 1907/2006 concerning the
registration, evaluation, authorization and restriction of
chemicals (REACH) as they enter into force and is through
product materials declarations preparing for the obligations
to communicate information on substances in the products.
Quality Statement
n2
n3
ο
Output Power
3/15/2023
ο
Form factor
The products are designed and manufactured in an
industrial environment where quality systems and methods
like ISO 9000, Six Sigma, and SPC are intensively in use to
boost the continuous improvements strategy. Infant
mortality or early failures in the products are screened out
and they are subjected to an ATE-based final test.
Conservative design rules, design reviews and product
qualifications, plus the high competence of an engaged
work force, contribute to the high quality of the products.
Options
n1
Description
S
Single Output
D
Dual Output
n2
1
1W
Warranty
n3
B
SIP7
Warranty period and conditions are defined in Flex General
Terms and Conditions of Sale.
Example: a 24Vdc nominal input, single 5Vdc output, 1W SIP7 product
would be PUC2405S1B.
* X1X2 = Nominal input voltage
X3X4 = Output voltage (single/symmetric dual or asymmetric dual
positive output)
X5X6 = Negative output voltage (only for asymmetric dual)
General Information
Reliability
The failure rate (λ) and mean time between failures
(MTBF= 1/λ) is calculated at max output power and an
operating ambient temperature (TA) of +25°C. Flex uses
MIL-HDBK-217F, Notice 2 to calculate the mean steadystate failure rate.
In MIL-HDBK-217F, all part reliability models include the
effects of environmental stresses through the environmental
factor, πE. It encompasses the major areas of equipment
use, here we use ground benign, GB.
Limitation of Liability
Flex does not make any other warranties, expressed or
implied including any warranty of merchantability or fitness
for a particular purpose (including, but not limited to, use in
life support applications, where malfunctions of product can
cause injury to a person’s health or life).
© Flex 2023
The information and specifications in this technical
specification is believed to be correct at the time of
publication. However, no liability is accepted for
inaccuracies, printing errors or for any consequences
thereof. Flex reserves the right to change the
contents of this technical specification at any time without
prior notice.
PUBLIC
PRODUCT SPECIFICATION
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DC/DC Converters
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1/1301-BMR803 Technical Specification
Checked
Isolated 1W Unregulated Single/Dual Output
Safety Specification
General information
Flex Power DC/DC converters and DC/DC regulators are
designed in accordance with the safety standards
IEC 62368-1, EN 62368-1 and UL 62368-1 Audio/video,
information and communication technology equipment Part 1: Safety requirements
IEC/EN/UL 62368-1 contains requirements to prevent injury
or damage due to the following hazards:
•
•
•
•
•
•
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Electrical shock
Electrically-caused fire
Injury caused by hazardous substances
Mechanically-caused injury
Skin burn
Radiation-caused injury
On-board DC/DC converters, Power interface modules and
DC/DC regulators are defined as component power
supplies. As components they cannot fully comply with the
provisions of any safety requirements without “conditions of
acceptability”. Clearance between conductors and between
conductive parts of the component power supply and
conductors on the board in the final product must meet the
applicable safety requirements. Certain conditions of
acceptability apply for component power supplies with
limited stand-off (see Mechanical Information for further
information). It is the responsibility of the installer to ensure
that the final product housing these components complies
with the requirements of all applicable safety standards and
regulations for the final product.
Component power supplies for general use shall comply
with the requirements in IEC/EN/UL 62368-1. Product
related standards, e.g. IEEE 802.3af Power over Ethernet,
and ETS-300132-2 Power interface at the input to telecom
equipment, operated by direct current (dc) are based on
IEC/EN/UL 62368-1 with regards to safety.
Flex Power DC/DC converters, Power interface modules
and DC/DC regulators are UL 62368-1 recognized and
certified in accordance with EN 62368-1. The flammability
rating for all construction parts of the products meet
requirements for V-0 class material according to
IEC 60695-11-10, Fire hazard testing, test flames – 50 W
horizontal and vertical flame test methods.
Isolated DC/DC converters & Power interface modules
The product may provide basic or functional insulation
between input and output according to IEC/EN/UL 62368-1
(see Safety Certificate), different conditions shall be met if
the output of a basic or a functional insulated product shall
be considered as ES1 energy source.
For basic insulated products (see Safety Certificate) the
output is considered as ES1 energy source if one of the
Date
3/15/2023
Rev
28701-BMR803
E
Z Rev. G
March 2023
© Flex
following conditions is met:
• The input source provides supplementary or double or
reinforced insulation from the AC mains according to
IEC/EN/UL 62368-1.
• The input source provides functional or basic insulation
from the AC mains and the product’s output is reliably
connected to protective earth according to
IEC/EN/UL 62368-1.
For functional insulated products (see Safety Certificate)
the output is considered as ES1 energy source if one of the
following conditions is met:
• The input source provides double or reinforced
insulation from the AC mains according to
IEC/EN/UL 62368-1.
• The input source provides basic or supplementary
insulation from the AC mains and the product’s output is
reliably connected to protective earth according to
IEC/EN/UL 62368-1.
• The input source is reliably connected to protective
earth and provides basic or supplementary insulation
according to IEC/EN/UL 62368-1 and the maximum
input source voltage is 60 Vdc.
Galvanic isolation between input and output is verified in an
electric strength test and the isolation voltage (Viso) meets
the voltage strength requirement for basic insulation
according to IEC/EN/UL 62368-1.
It is recommended to use a slow blow fuse at the input of
each DC/DC converter. If an input filter is used in the circuit
the fuse should be placed in front of the input filter. In the
rare event of a component problem that imposes a short
circuit on the input source, this fuse will provide the
following functions:
• Isolate the fault from the input power source so as not
to affect the operation of other parts of the system
• Protect the distribution wiring from excessive current
and power loss thus preventing hazardous overheating
Non - isolated DC/DC regulators
The DC/DC regulator output is ES1 energy source if the
input source meets the requirements for ES1 according to
IEC/EN/UL 62368-1.
4
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1 (8)
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Checked
Isolated 1W Unregulated Single/Dual Output
Date
3/15/2023
Rev
March 2023
28701-BMR803
Rev. G
G
© Flex
Absolute Maximum Ratings
Characteristics
min
TP1
Operating Temperature (see Thermal Consideration section)
-40
TCASE
Max. case temperature
TS
Storage temperature
-55
VI
Input voltage Range (base on nominal input voltage)
-10
Viso
Isolation voltage (input to output test voltage in 1minute)
typ
max
Unit
+100
°C
+110
°C
+125
°C
+10
%
6000
Vdc
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the Electrical Specification section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Fundamental Circuit Diagram
Single Output
+Vin
+Vo
-Vin
-Vo
Dual Output
5
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2/1301-BMR803 Technical Specification
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DC/DC Converters
jidgezou
Checked
Isolated 1W Unregulated Single/Dual Output
Date
Rev
March 2023
28701-BMR803
Rev. G
G
3/15/2023
© Flex
Electrical Specification
Typical values given at: TP1 = +25°C, unless otherwise specified under Conditions.
Part Number
Input Voltage
(±10%)
V
Output
Voltage
V
Output
Current
mA
Efficiency (typ.)
50% of max IO
%
Efficiency (typ.)
max IO
%
Capacitive
Load (note 1)
μF
5
3.3
303
70
76.5
1000
PUC0503S1B
PUC0505S1B
5
5
200
70
76.5
1000
PUC0512S1B
5
12
84
70
78
220
PUC0505D1B
5
±5
100
69
77
330
PUC0512D1B
5
±12
42
70
78
100
PUC1203S1B
12
3.3
303
67
76.5
100
PUC1205S1B
12
5
200
69
79.5
1000
PUC1212S1B
12
12
84
70
80
220
PUC1212D1B
12
±12
42
69
80
100
PUC1505S1B
15
5
200
70
80
1000
PUC2403S1B
24
3.3
303
69
75
1000
PUC2405S1B
24
5
200
71
78
1000
PUC2412S1B
24
12
84
68
80
220
PUC2415S1B
24
15
67
67
80
220
PUC2405D1B
24
±5
100
69
77
330
PUC2412D1B
24
±12
42
68
80
100
PUC2415D1B
24
±15
34
67
80
100
Characteristics
CI
Internal input capacitance
PO
Output power
CISO
Isolation capacitance
RISO
Isolation resistance
Conditions
min
typ
max
1
10
pF
TP1 = +25°C, IO = max IO
-5
Minimum load
TP1 = +25°C
0
Line regulation
VLL to VHL, max IO
1.2
1.3
Load regulation
ILL - IHL, at typ. Vin
VO = 3.3 / 5 V
10
15
VO = 12 - 15 V
7.5
10
fs
Switching frequency
100 % of max IO (at Nominal Vin)
VOac
Output ripple & noise
20 MHz bandwidth limit, see Note 2
Note 1: The maximum capacitive load is test by normal input and constant resistive load.
Note 2: The Output ripple & noise is under nominal Vin and max IO with 0.1 μF/50 V MLCC
W
GΩ
10
Voltage accuracy
VOi
Unit
μF
1
+5
%
%
30
%
%
kHz
100
mVp-p
6
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DC/DC Converters
jidgezou
Date
Isolated 1W Unregulated Single/Dual Output
Rev
March 2023
28701-BMR803
Rev. G
G
3/15/2023
© Flex
Typical Characteristics
PUC-1B series
100%
100%
80%
80%
60%
PUC0503S1B
PUC0505S1B
PUC0512S1B
PUC0505D1B
PUC0512D1B
40%
20%
0%
0
10
20
30
40 50 60
Load (%)
70
80
Efficiency
Efficiency
Efficiency
Efficiency
60%
PUC1203S1B
40%
PUC1205S1B
20%
0%
90 100
PUC1212S1B
PUC1212D1B
0
PUC05-1B
Efficiency vs. load current at TP1 = +25°C.
100%
80%
80%
60%
60%
PUC1505S1B
20%
30
40 50 60
Load (%)
70
0
10
20
30
40 50 60
Load (%)
70
80
90 100
40%
Load (%)
100
80
60
40
Nat. Conv.
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110
0%
0
10
20
30
40 50 60
Load (%)
70
80
PUC24-1B
Efficiency vs. load current at TP1 = +25°C.
Operating Ambient Temperature Curve
Available load vs. ambient air temperature.
See Thermal Consideration section.
80
90 100
PUC2403S1B
PUC2405S1B
PUC2412S1B
PUC2415S1B
PUC2405D1B
PUC2412D1B
PUC2415D1B
20%
PUC15-1B
Efficiency vs. load current at TP1 = +25°C.
20
Efficiency
100%
Efficiency
Efficiency
0%
20
PUC12-1B
Efficiency vs. load current at TP1 = +25°C.
Efficiency
40%
10
[°C]
90 100
7
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2/1301-BMR803 Technical Specification
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DC/DC Converters
jidgezou
Checked
Date
Isolated 1W Unregulated Single/Dual Output
Rev
March 2023
28701-BMR803
Rev. G
G
3/15/2023
© Flex
Typical Characteristics
PUC-1B series
Output Voltage Accuracy
Output Voltage Accuracy
30%
5Vin
20%
10.8Vin
12Vin
20%
5.5Vin
13.2Vin
Efficiency
Efficiency
30%
4.5Vin
10%
0%
-10%
10%
0%
-10%
-20%
-20%
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
Load (%)
PUC05-1B
Output voltage accuracy vs. load current at TP1 = +25°C.
60
70
80
100
Output Voltage Accuracy
30%
30%
13.5Vin
15Vin
20%
21.6Vin
24Vin
20%
Efficiency
16.5Vin
10%
0%
-10%
26.4Vin
10%
0%
-10%
-20%
-20%
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
Load (%)
50
60
70
80
90
100
Load (%)
PUC1505S1B
Output voltage accuracy vs. load current at TP1 = +25°C.
PUC24-1B
Output voltage accuracy vs. load current at TP1 = +25°C.
Load Regulation
Load Regulation
20%
20%
4.5Vin
10.8Vin
5Vin
12Vin
15%
Regulation
15%
Regulation
90
PUC12-1B
Output voltage accuracy vs. load current at TP1 = +25°C.
Output Voltage Accuracy
Efficiency
50
Load (%)
5.5Vin
10%
5%
13.2Vin
10%
5%
0%
0
10
20
30
40
50
60
70
80
90
100
Load (%)
0%
0
10
20
30
40
50
60
70
80
90
100
Load (%)
PUC05-1B
PUC12-1B
Output voltage with load variation vs. load current at TP1 = +25°C
Output voltage with load variation vs. load current at TP1 = +25°C
8
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Checked
Date
Isolated 1W Unregulated Single/Dual Output
Rev
March 2023
28701-BMR803
Rev. G
G
3/15/2023
© Flex
Typical Characteristics
PUC-1B series
Load Regulation
Load Regulation
20%
20%
13.5Vin
15Vin
24Vin
15%
16.5Vin
10%
5%
Regulation
15%
Regulation
21.6Vin
26.4Vin
10%
5%
0%
0
10
20
30
40
50
60
70
80
90
100
Load (%)
0%
0
10
20
30
40
50
60
Load (%)
70
80
90
100
PUC1505S1B
PUC24-1B
Output voltage with load variation vs. load current at TP1 = +25°C
Output voltage with load variation vs. load current at TP1 = +25°C
Output Ripple & Noise
Output voltage ripple at:
TP1 = +25°C, VI = 5 V, VO = 5 V
IO = 200 mA resistive load.
Output Ripple & Noise
Trace: output voltage (50 mV/div.).
Time scale: (10 µs/div.).
20 MHz bandwidth filter +0.1 µF
Output Ripple & Noise
Output voltage ripple at:
TP1 = +25°C, VI = 15 V, VO = 5 V
IO = 200 mA resistive load.
Output voltage ripple at:
TP1 = +25°C, VI = 12 V, VO = 5 V
IO = 200 mA resistive load.
Trace: output voltage (50 mV/div.).
Time scale: (10 µs/div.).
20 MHz bandwidth filter +0.1 µF
Output Ripple & Noise
Trace: output voltage (50 mV/div.).
Time scale: (10 µs/div.).
20 MHz bandwidth filter +0.1 µF
Output voltage ripple at:
TP1 = +25°C, VI = 24V, VO = 5 V
IO = 200 mA resistive load.
Trace: output voltage (50 mV/div.).
Time scale: (10 µs/div.).
20 MHz bandwidth filter +0.1 µF
9
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Checked
Isolated 1W Unregulated Single/Dual Output
Date
3/15/2023
Rev
28701-BMR803
Rev. G
G
PUC-1B series
Start-up
Shut-down
Top trace: Input voltage (2 V/div.).
Bottom trace: - Output voltage (2 V/div.).
Time scale: (1 ms/div.).
Start-up
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 12 V, VO = 5 V
IO = 200 mA resistive load.
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 5 V, VO = 5 V
IO = 200 mA resistive load.
Top trace: Input voltage (2 V/div.).
Bottom trace: - Output voltage (2 V/div.).
Time scale: (2 ms/div.).
Shut-down
Top trace: Input voltage (5 V/div.).
Bottom trace: Output voltage (2 V/div.).
Time scale: (1 ms/div.).
Start-up
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 15 V, VO = 5 V
IO = 200 mA resistive load.
March 2023
© Flex
Typical Characteristics
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 5 V, VO = 5 V
IO = 200 mA resistive load.
6 (8)
No.
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 12 V, VO = 5 V
IO = 200 mA resistive load.
Top trace: Input voltage (5 V/div.).
Bottom trace: Output voltage (2 V/div.).
Time scale: (2 ms/div.).
Shut-down
Top trace: Input voltage (5 V/div.).
Bottom trace: Output voltage (2 V/div.).
Time scale: (1 ms/div.).
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 15 V, VO = 5 V
IO = 200 mA resistive load.
Top trace: Input voltage (5 V/div.).
Bottom trace: Output voltage (2 V/div.).
Time scale: (2 ms/div.).
10
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2/1301-BMR803 Technical Specification
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PUC-1BGeorge
series Zou
DC/DC Converters
jidgezou
Checked
Isolated 1W Unregulated Single/Dual Output
Date
3/15/2023
Rev
28701-BMR803
Rev. G
G
March 2023
© Flex
Typical Characteristics
PUC-1B series
Start-up
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 24 V, VO = 5 V
IO = 200 mA resistive load.
7 (8)
No.
Shut-down
Top trace: Input voltage (10 V/div.).
Bottom trace: Output voltage (2 V/div.).
Time scale: (1 ms/div.).
Start-up, enabled by connecting VI at:
TP1 = +25°C, VI = 24 V, VO = 5 V
IO = 200 mA resistive load.
Top trace: Input voltage (10 V/div.).
Bottom trace: Output voltage (2 V/div.).
Time scale: (2 ms/div.).
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1 (4)
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3/1301-BMR803 Technical Specification
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PUC-1BGeorge
series Zou
DC/DC Converters jidgezou
jidgezou
Isolated 1W Unregulated Single/DualG OutputZ
Date
10/15/2020
Rev
28701-BMR803
Rev. G
D
March 2023
© Flex
EMC Specification
Conducted EMI measured according to EN55032, CISPR 32
and FCC part 15J (see test set-up). See Design Note 029 for
further information. The minimum switching frequency is 40
kHz. The EMI characteristics below is measured at max IO.
Optional external filter for class B
Suggested external input filter in order to meet class B in
EN 55032, CISPR 32 and FCC part 15J.
Test set-up
Layout recommendations
The radiated EMI performance of the product will depend on
the PWB layout and ground layer design. It is also important to
consider the stand-off of the product. If a ground layer is used,
it should be connected to the output of the product and to the
equipment ground or chassis.
Series
L1
C1
PUC05-1B
47 μH
10 μF
PUC12-1B
47 μH
10 μF
PUC15-1B
22 μH
4.7 μF
PUC24-1B
100 μH
4.7 μF
A ground layer will increase the stray capacitance in the PWB
and improve the high frequency EMC performance.
Output ripple and noise
Output ripple and noise is measured according to figure
below. See Design Note 022 for detailed information.
Based on different applications or PCB layout conditions, the EMI
requirement may be varied. Recommend to reserve Cy1 for better
EMI performance. Depending on the different requirement of end
users, the value of Cy1 could be adjusted from 33pF to 470pF.
Output ripple and noise test setup
PUC0512S1B
EMI with filter
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PUC-1BGeorge
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DC/DC Converters jidgezou
jidgezou
Isolated 1W Unregulated Single/DualG OutputZ
Operating Information
Input Voltage
Converter with 10% input voltage range, mainly for isolated
power in industrial applications. For example, the input voltage
range 4.5 to 5.5 Vdc meets requirement of general industrial
used for 5Vdc system.
The input voltage should never exceed the absolute voltage of
the converter, and the ambient temperature must be limited to
absolute max +100°C.
The output voltage related to input voltage. Take 5Vin and
5Vo product as an example, if input voltage above 5V, the
output voltage will higher than 5V. Below 5V and the output
voltage starts to track the input voltage.
Short duration transient disturbances can occur on the DC
distribution and input of the product when a short circuit fault
occurs on the equipment side of a protective device (fuse or
circuit breaker). The voltage level, duration and energy of the
disturbance are dependent on the particular DC distribution
network characteristics and can be sufficient to damage the
product unless measures are taken to suppress or absorb this
energy. The transient voltage can be limited by capacitors and
other energy absorbing devices like Zener diodes connected
across the positive and negative input conductors at a number
of strategic points in the distribution network. The end-user
must secure that the transient voltage will not exceed the
value stated in the Absolute maximum ratings. ETSI TR
100 283 examines the parameters of DC distribution networks
and provides guidelines for controlling the transient and
reduce its harmful effect.
Turn-off Input Voltage
The products do not have under voltage lock-out function.
Please make sure the input voltage of each module is correct
working range.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the product. It is important that
the input source has low characteristic impedance.The
product are designed for stable operation without external
capacitors. With a 10μF capacitors connected to the input
could reduce the input noise cause by parasitic inductance.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the load can be
improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic and
electrolytic capacitors as close to the load as possible, using
several parallel capacitors to lower the effective ESR. The
ceramic capacitors will handle high-frequency dynamic load
Date
10/15/2020
Rev
28701-BMR803
Rev. G
D
March 2023
© Flex
changes while the electrolytic capacitors are used to handle
low frequency dynamic load changes. It is equally important to
use low resistance and low inductance PWB layouts and
cabling.
External decoupling capacitors will become part of the
product’s control loop. The control loop is optimized for a wide
range of external capacitance and the maximum and minimum
recommended value that could be used without any additional
analysis is found in the Electrical specification. The ESR of the
capacitors is a very important parameter. Stable operation is
guaranteed with a verified ESR value of >1 mΩ across the
output connections.
For further information please contact your local Flex Power
Modules representative.
Parallel Operation
This product is not designed for paralleling without using
external current sharing circuits.
Over Current Protection (OCP)
The products include current limiting circuitry for protection at
continuous overload. The OCP works in a hiccup mode and
will make continous attempts to start up and will resume
normal operation automatically after removal of the over
current condition. The load distribution should be designed for
the specified maximum output short circuit current.
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No.
3/1301-BMR803 Technical Specification
jidgezou George Zou
Approved (Document resp)
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PUC-1BGeorge
series Zou
DC/DC Converters jidgezou
jidgezou
Isolated 1W Unregulated Single/DualG OutputZ
Date
Rev
28701-BMR803
Rev. G
D
10/15/2020
© Flex
Connections
Thermal Consideration
General
The products are designed to operate in different thermal
environments and sufficient cooling must be provided to
ensure reliable operation.
For products mounted on a PWB without a baseplate
attached, cooling is achieved mainly by conduction, from the
pins to the host board, and convection, which is dependant on
the airflow across the product. Increased airflow enhances the
cooling of the product. The Output Current Derating graph
found in the Output section for each model provides the
available output current vs. ambient air temperature and air
velocity.
The product is tested on a 95 x 85 mm, 35 µm (1 oz), 2-layer
test board mounted horizontally in a space with a volume of
300(L) x 300(W) x 200(H) mm.
Bottom View
PUCxxxxS1B single output series
Pin
1
Designation
+Vin
Function
Positive Input
2
-Vin
Negative Input
5
-Vo
Negative Output
7
+Vo
Positive Output
Connections
Definition of product operating temperature
The temperature at the positions P1 (TP1) should not exceed
the maximum temperatures in the table below. The number of
measurement points may vary with different thermal design
and topology. Temperatures above maximum measured at the
reference point P1 are not allowed and may cause permanent
damage.
Position
Description
Max Temp.
P1
13
Driver, Reference point
Pin side (baseplate module)
TP1=110º C
Bottom View
PUCxxxxD1B dual output series
Pin
1
Designation
+Vin
Function
Positive Input
2
-Vin
Negative Input
5
-Vo
Negative Output
6
COM
Common
7
+Vo
Positive Output
March 2023
14
PRODUCT SPEC. MECHANICAL
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PUC-1B series DC/DC Converters
Isolated 1W Unregulated Single/Dual Output
Approved (Document resp)
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Date
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Technical Specification
Rev
28701-BMR803 Rev. G
March 2023
© Flex
Mechanical Information – Through Hole Mounting
Recommended Footprint
● Single
● Dual
All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle,
unless explicitly described and dimensioned in this drawing.
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DC/DC Converters
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Checked
Isolated 1W Unregulated Single/Dual Output
Soldering Information - Hole Mounting
The hole mounted product is intended for plated through hole
mounting by wave or manual soldering. The pin temperature is
specified to maximum to 260°C for maximum 5 seconds.
A maximum preheat rate of 4°C/s and maximum preheat
temperature of 150°C is suggested. When soldering by hand,
care should be taken to avoid direct contact between the hot
soldering iron tip and the pins for more than a few seconds in
order to prevent overheating.
A no-clean flux is recommended to avoid entrapment of
cleaning fluids in cavities inside the product or between the
product and the host board. The cleaning residues may affect
long time reliability and isolation voltage.
Delivery Package Information
The products are delivered in antistatic tube.
Tube Specifications – SIP
Material
Antistatic PS
Surface resistance
105 < Ohm/square < 1012
Tube length
520 mm 20.47 [ inch]
Tube capacity
24 products (30 full tubes/box)
Tube weight
27.6 g empty, 100 g full tube
Module weight
2.8 g / pc
1BOX = 24 (pcs/tube) * 6(tube/bundle) * 5 (bundle) = 720pcs
1BOX = 720 converters
All dimensions in mm
Note: pick up positions refer to center of pocket.
See mechanical drawing for exact location on product.
Date
3/15/2023
Rev
28701-BMR803
Rev. G
C
© Flex
March 2023
16
PUBLIC
PRODUCT SPEC.
Prepared (Subject resp)
2 (3)
No.
5/1301 - BMR803
Technical Specification
jidgezou George Zou
Approved (Document resp)
PUC-1BGeorge
series Zou
DC/DC Converters
jidgezou
Checked
Isolated 1W Unregulated Single/Dual Output
Date
3/15/2023
Rev
28701-BMR803
Rev. G
C
© Flex
Product Qualification Specification
Characteristics
External visual inspection
IPC-A-610
Change of temperature
(Temperature cycling)
MI-STD-202G, method 107G
Temperature range
Number of cycles
Dwell/transfer time
-55 to 125°C
1000
30 min/0-1 min
Cold (in operation)
IEC 60068-2-1 Ad
Temperature TA
Duration
-45°C
72 h
Damp heat
MIL-STD-202G, Method 103B
Temperature
Humidity
Duration
85°C
95 % RH
1000 hours
Dry heat
IEC 60068-2-2 Bd
Temperature
Duration
125°C
1000 h
Electrostatic discharge
susceptibility
IEC 61000-4-2
Air model
Contact model
8000 V
6000 V
Mechanical shock
MIL-STD-202G, method 213B
Peak acceleration
Duration
100 g
6 ms
Operational life test
MIL-STD-202G, method 108A
Duration
1000 h
Resistance to soldering heat 1
MIL-STD-202G, method 210F
Solder temperature
Duration
260°C
10 s
Robustness of terminations
IEC 60068-2-21 Test Ua1
IEC 60068-2-21 Test Ue1
Through hole mount products
Surface mount products
All leads
All leads
Solderability
J-STD-002
Preconditioning
Temperature, Pb-free
Steam ageing 8 h
245°C
Vibration
MIL-STD-202G, method 201A
Frequency
Displacement
Duration
10 to 55 Hz
0.06 inch
2 h in each direction
Notes
1
Only for products intended for wave soldering (plated through hole products)
March 2023
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