NCP1060FLBKGEVB
NCP1060 Flyback Converter
Evaluation Board
User'sManual
Universal AC Mains, Up to 7 Watt Isolated
Power Supply
Introduction
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EVAL BOARD USER’S MANUAL
Pin LIM/OPP is connected through resistor R6 to
auxiliary winding and sets over−power protection. Resistor
R9 decreases maximal peak current. The frequency
compensation of the feedback loop system is ensured by
external capacitor C8 that is connected to the IC OTA output.
This evaluation board manual describes a simple, low
power (up to 7 W), universal AC mains Flyback converter.
The converter provides constant voltage output. The supply
can be used for powering utility electric meters, white goods
or similar industrial equipments where isolation from the
AC mains is required. The main benefits of provided
solution are high efficiency, cost effectiveness and low
no−load power consumption. The converter is utilizing
monolithic ON Semiconductor switcher NCP1060 with
integrated 34 W MOSFET in a PDIP7 package. The
evaluation board manual provides complete circuit diagram
and bill of materials. The current capability of provided
converter is user adjustable.
Key Features
•
•
•
•
•
Circuit Description
•
•
The varistor R4 together with resistor R3 form simple
protection that enhances application robustness against line
over−voltage and voltage spikes. Resistor R3 also limits the
inrush current when the power supply is connected to mains.
The EMC filter is implemented to reduce conducted
electromagnetic emissions to the mains.
The Flyback converter itself is formed by the high voltage
switching regulator IC1, transformer TR1, freewheeling
diode D3 and coil L1 (L3). Capacitors C5, C6, C7 and C8 are
used as the output filtering and energy storage bank. Resistor
R1 and capacitor C2 for filter, C1, R2 and D2 are forming
voltage clamp for the switcher drain. Opto−coupler OK1
(NCP431) is used in feedback network. Resistors R8, R12
and R13 form resistive divider and sets output voltage.
Diode D7 and resistor R14 provide supply voltage for IC1
Vcc from auxiliary winding. The capacitor C10 is the energy
storage element that keeps IC1 powered during light load
conditions, when the switching frequency drops and energy
from auxiliary winding refills Vcc capacitors less often.
Universal AC Input Range (85 – 265 Vac)
Input Filter for Conducted EMI Attenuation
Very Low Standby and No−load Power Consumption
Frequency Fold−back for Improved Efficiency at Light
Load
Inherent Over−current, Over−voltage and
Over−temperature Protections
Frequency Jittering for Better EMI Signature
Adjustable Peak Current to Set the Required Level of
Over−current Protection
Table 1.
Description
Output Specification
Output Voltage
12 Vdc
Output Ripple
< 25 mV @ Full Load
Max Output Current
0.6 A
Min Output Current
0A
Efficiency
See Efficiency Charts
Input Protection
Fuse
Operating Temperature Range
Cooling Method
0°C to +50°C
Passive Cooling
No−load Power Consumption
< 75 mW @ 85 − 265 Vac
Table 2.
Device
Application
Input Voltage
Output Power
Topology
I/O Isolation
NCP1060AP060G
White Goods,
E−Meters
85 to 265 Vac
5 to 7 W
Flyback
Yes
© Semiconductor Components Industries, LLC, 2016
January, 2016 − Rev. 0
1
Publication Order Number:
EVBUM2345/D
NCP1060FLBKGEVB
CIRCUIT DIAGRAM
L1: Würth elektronik − part No.: 744025002
L2: Würth elektronik − part No.: 768772102
L4: Würth elektronik − part No.: 744862120
TR1: Würth elektronik − part No.: 750370026
Figure 1. Circuit Diagram
EVALUATION BOARD
Figure 2. Evaluation Board − Top Side
Figure 3. Evaluation Board − Bottom Side
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NCP1060FLBKGEVB
Figure 4. Conducted Emission Quasi−peak dBmV (Domestic)
Figure 5. Efficiency vs. Output Load Curves
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NCP1060FLBKGEVB
Figure 6. No−load Power Consumption vs. Line Input Curves
OUTPUT RIPPLE VOLTAGE
Figure 7. Input Voltage 85 Vac and 0.4 A Load
Figure 8. Input Voltage 110 Vac and 0.4 A Load
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NCP1060FLBKGEVB
Figure 9. Input Voltage 230 Vac and 0.4 A Load
Figure 10. Input Voltage 265 Vac and 0.4 A Load
TRANSIENT RESPONSE
Vo
Vo
Io
Io
Figure 11. Test Condition: 30−400 mA, 28 ms Cycle,
110 Vac
Figure 12. Test Condition: 30−400 mA, 28 ms Cycle,
230 Vac
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NCP1060FLBKGEVB
STARTUP TIME
Vo
Vo
VBULK
VBULK
Figure 13. Input Voltage 85 Vac and 0.4 A Load
Figure 14. Input Voltage 110 Vac and 0.4 A Load
Vo
Vo
VBULK
VBULK
Figure 15. Input Voltage 230 Vac and 0.4 A Load
Figure 16. Input Voltage 265 Vac and 0.4 A Load
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NCP1060FLBKGEVB
POWER OFF
Vo
Vo
VBULK
VBULK
Figure 17. Input Voltage 85 Vac and 0.4 A Load
Figure 18. Input Voltage 110 Vac and 0.4 A Load
Vo
Vo
VBULK
VBULK
Figure 19. Input Voltage 230 Vac and 0.4 A Load
Figure 20. Input Voltage 265 Vac and 0.4 A Load
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NCP1060FLBKGEVB
Table 3. BILL OF MATERIALS
Designator
Qty
Description
Value
Tolerance
C1
1
Capacitor
10 nF
10%
Manufacturer
Part Number
Substitution
Allowed
Vishay BC
Components
BFC237261103
Yes
Footprint
Manufacturer
Through
hole
C2
1
Ceramic Capacitor
1.0 nF
10%
805
Kemet
C0805C102K5RACTU
Yes
C3, C4
2
Electrolytic Capacitor
10 mF / 400 V
20%
Through
hole
Würth
Elektronik
860011375006
Yes
C5
1
Electrolytic Capacitor
NU
C6
1
Electrolytic Capacitor
470 mF / 16 V
20%
Through
hole
Würth
Elektronik
870235375008
Yes
C7
1
Electrolytic Capacitor
470 mF / 16 V
20%
Through
hole
Würth
Elektronik
870235375008
Yes
C8, C11
2
Ceramic Capacitor
100 nF
10%
805
Kemet
C0805C104K5RAC
Yes
C9
1
Ceramic Capacitor
NU
C10
1
Electrolytic Capacitor
10 mF / 35 V
20%
Through
hole
Würth
Elektronik
870055673001
Yes
C12
1
Ceramic Capacitor
2.2 nF
10%
805
Kemet
C0805C222K5RACTU
Yes
C13
1
Ceramic Capacitor
12 nF
10%
805
Kemet
C0805C123K5RACTU
Yes
C14
1
Electrolytic Capacitor
4.7 mF / 35 V
20%
Through
hole
Würth
Elektronik
860010572001
Yes
CX1
1
Capacitor X2
68 nF
10%
Through
hole
Würth
Elektronik
890334025013CS
Yes
CX2
1
Capacitor X2
150 nF
10%
Through
hole
Würth
Elektronik
890334025022
Yes
CY
1
Capacitor X1Y1
1.0 nF
20%
Through
hole
Murata
DE1E3KX102MA5BA01
Yes
D1, D4, D5,
D6
4
Diode
MRA4007
SMA
ON
Semiconductor
MRA4007T3G
No
D2
1
Diode
MURA160
SMA
ON
Semiconductor
MURA160T3G
No
D3
1
Diode
MBRS1100
SMC
ON
Semiconductor
MBRS1100T3G
No
D7
1
Diode
MMSD4148
SOD123
ON
Semiconductor
MMSD4148T3G
No
IC1
1
Switcher
NCP1060
PDIP−7
ON
Semiconductor
NCP1060AP060G
No
L1
1
Inductor
2.2 mH
WE−TPC
_2828
Würth
Elektronik
744025002
No
L2
1
Inductor
1.0 mH
RFB0807
Würth
Elektronik
768772102
No
L3
1
Inductor
NU
RFB0807
L4
1
Common Mode Filter Choke
12 mH
WE−TFC
Würth
Elektronik
744862120
No
OK1
1
Optocoupler
FOD817
SMD−4
Fairchild
Semiconductor
FOD817CS
No
R1
1
Resistor
15 W
1%
805
Rohm
Semiconductor
MCR10ERTF15R0
Yes
R2
1
Resistor
270 kW
1%
0207/10
Vishay Dale
CMF55270K00FKEB
Yes
R3
1
Resistor
20 W
5%
613
Vishay BC
Components
AC03000002009JAC00
Yes
R4
1
Varistor
820572711
Through
hole
Würth
Elektronik
820572711
No
R5
1
Resistor
4.7 kW
1%
805
Rohm
Semiconductor
MCR10ERTF4701
Yes
R6
1
Resistor
560 kW
1%
805
Rohm
Semiconductor
MCR10ERTF5603
Yes
R7
1
Resistor
1.0 kW
1%
805
Rohm
Semiconductor
MCR10ERTF1001
Yes
Through
hole
805
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NCP1060FLBKGEVB
Table 3. BILL OF MATERIALS
Designator
Qty
Description
Value
Tolerance
R8
1
Resistor
33 kW
1%
Footprint
805
Manufacturer
Part Number
Substitution
Allowed
Rohm
Semiconductor
MCR10ERTF3302
Yes
Manufacturer
R9
1
Resistor
NU
805
R10
1
Resistor
0.0 W
805
Vishay Dale
CRCW08050000Z0EA
Yes
R11
1
Resistor
4.7 MW
5%
Axial
Lead
Welwyn
VRW37−4M7JI
Yes
R12
1
Resistor
9.1 kW
1%
805
Rohm
Semiconductor
MCR10ERTF9101
Yes
R13
1
Resistor
200 kW
1%
805
Rohm
Semiconductor
MCR10ERTF2003
Yes
R14
1
Resistor
10 W
1%
805
Rohm
Semiconductor
MCR10ERTF10R0
Yes
TR1
1
Transformer
750370026
Through
hole
Würth
Elektronik
750370026
No
VR1
1
Voltage Regulator
NCP431
TO−92
ON
Semiconductor
NCP431ACLPRAG
No
X1, X2
2
Wago Screw Clamp
237−102 unknown 70K9898
69110171000
2
Through
hole
Würth
Elektronik
691101710002
No
−
2
Wire Strap (insulated)
−
Wire
strap
Various
Board
Standoff
4
Hex Standoff M3 Nylon
8.0 mm
1%
Yes
Harwin
Yes
R30−1610800
Yes
NOTE All components are lead free.
REFERENCES
[1] ON Semiconductor datasheet for NCP1060 monolithic switcher
[2] ON Semiconductor design notes DN05012, DN05017, DN05018, DN05028, DN05029
[3] Würth Elektronik http://www.we−online.com/
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