Presentación de Seminario de Fuentes de Poder Conmutadas (GDL, MTY, MEX y QRO)

1. ST Off-Line Power Supply
September 2011

2. Agenda
 ST brief Introduction
 Offline Common configurations
 SMPS Fundamentals
 SMPS Common Configurations
 New VIPer+ Family
 Roadmap
 Products
 Detailed description
 New products
 Magnetic Components
 Lunch
 Layout Recommendations
 Design Tools
2

3. ST brief introduction

4. Market Segments
30 % 38%
Automotive, Consumer,
Industrial and
Computer and
Wireless Multisegment Sector
Communication 31 % (“IMS”)
50/50 JV with Ericsson Infrastructure (“ACCI”)
Home Computer & Automotive Analog, Microcontrollers,
Entertainment Communication Products Power and Memories and
Major Product Lines & Displays Infrastructure Group MEMS Smartcards
Products
Wireless: Consumer: Computer: Automotive: Industrial:
Market Position* #2 #2 in Set Top Box #2 (HDD & Printers) #3 #1
Major Customers
* Source: iSuppli-2008 rankings, ST and ST-Ericsson
4

5. 2010 overall ranking
Revenue Revenue Revenue
2009 2010 2009 2010
Company Name Percent Percent Cumulative
Rank Rank Revenue($) Revenue($)
Change of Total Percent
1 1 Intel 32,187 40,394 25.5% 13.3% 13.3%
2 2 Samsung Electronics 17,496 27,834 59.1% 9.2% 22.4%
3 3 Toshiba 10,319 13,010 26.1% 4.3% 26.7%
4 4 Texas Instruments (1) 9,671* 12,994 34.4% 4.3% 31.0%
9 Renesas Electronics (2) 5,153
5 11,893* 130.8% 3.9% 34.9%
12 NEC Electronics 4,384
7 6 Hynix 6,246 10,380 66.2% 3.4% 38.3%
5 7 STMicroelectronics 8,510 10,346 21.6% 3.4% 41.7%
13 8 Micron Technology (3) 4,293* 8,876* 106.8% 2.9% 44.6%
6 9 Qualcomm 6,409 7,204 12.4% 2.4% 47.0%
14 10 Broadcom (4) 4,278 6,682* 56.2% 2.2% 49.2%
15 11 Elpida Memory 3,948 6,446 63.3% 2.1% 51.3%
8 12 AMD 5,207 6,345 21.9% 2.1% 53.4%
11 13 Infineon Technologies (5) 4,456* 6,319 41.8% 2.1% 55.5%
10 14 Sony (6) 4,468* 5,224 16.9% 1.7% 57.2%
18 15 Panasonic Corporation (7) 3,243* 4,946 52.5% 1.6% 58.8%
17 16 Freescale Semiconductor (8) 3,402* 4,357 28.1% 1.4% 60.3%
19 17 NXP (9) 3,240 4,028* 24.3% 1.3% 61.6%
23 18 Marvell Technology Group 2,572 3,633 41.3% 1.2% 62.8%
16 19 MediaTek 3,551 3,553 0.1% 1.2% 64.0%
20 20 nVidia 2,826 3,196 13.1% 1.1% 65.0%
Top 20 Companies 141,475 197,660 39.7% 65.0%
All Others 88,719 106,415 19.9% 35.0%
Total Semiconductor 230,194 304,075 32.1% 100.0%
Source: iSuppli, March 11th 2011
(x) * refers to M&A. Details provided on separate page.
5

6. 2010 ranking on ST SAM
2009 2010 Revenue Revenue Revenue
2009 2010 Revenue Revenue Percent Percent Cumulative
Rank Rank Company Name ($) ($) Change of Total Percent
1 1 Texas Instruments 9,671 12,994 34.4% 7.3% 7.3%
5 Renesas Electronics 5,146
2 11,469 122.9% 6.4% 13.8%
9 NEC Electronics 4,119
2 3 STMicroelectronics 8,093 9,778 20.8% 5.5% 19.3%
4 4 Intel 5,721 7,233 26.4% 4.1% 23.3%
3 5 Qualcomm 6,409 7,204 12.4% 4.1% 27.4%
8 6 Broadcom 4,278 6,682 56.2% 3.8% 31.1%
7 7 Infineon Technologies 4,456 6,319 41.8% 3.6% 34.7%
6 8 Toshiba 5,053 5,659 12.0% 3.2% 37.9%
11 9 Samsung Electronics 3,279 4,348 32.6% 2.4% 40.3%
12 10 NXP 3,235 4,024 24.4% 2.3% 42.6%
18 11 Panasonic Corporation 2,428 3,647 50.2% 2.1% 44.6%
10 12 MediaTek 3,551 3,553 0.1% 2.0% 46.6%
17 13 Marvell Technology Group 2,458 3,472 41.3% 2.0% 48.6%
15 14 Freescale Semiconductor 2,537 3,204 26.3% 1.8% 50.4%
13 15 nVidia 2,826 3,196 13.1% 1.8% 52.2%
16 16 Fujitsu Semiconductor Limited 2,537 3,059 20.6% 1.7% 53.9%
14 17 Sony 2,810 2,999 6.7% 1.7% 55.6%
20 18 Analog Devices 2,091 2,862 36.9% 1.6% 57.2%
19 19 ROHM Semiconductor 2,286 2,776 21.4% 1.6% 58.7%
23 20 Maxim Integrated Products 1,657 2,367 42.8% 1.3% 60.1%
Top 20 Companies 80,522 106,845 32.7% 60.1%
All Others 59,587 70,997 19.1% 39.9%
Total Semiconductor 140,109 177,842 26.9% 100.0%
SAM = TAM – DRAM – Flash – MPU - Opto Source: iSuppli, March 11th 2011
6

7. Manufacturing Locations
France Italy
(Crolles I & II, Rousset, Tours) (Agrate, Catania 6”& 8”)
China
Morocco (Shenzhen, Longgang)
Malta
Philippines
Malaysia
 2009 sales : US$ 8.51 billion Singapore
 2010 sales : US$ 10.346 billion
 Approx. 53,000 employees in the group Front-end fabs
 15 main production sites
Back-end fabs
 Advanced R&D centers in 10 countries

8. Innovation Investment
8

9. SMPS Fundamentals
9

10. Power Supply in Appliances
 Power ranges from 3W to 15W
 Non-isolated topologies are used where there
are no external electrical connection.
 Isolated topologies are used where there is a
possibility of user touching electrical points.
 Cost and simplicity are key drivers.
10

11. BUCK
11

12. Topology
S1
L1
V2
V1
+
+
IL
S2
12

13. Topology Applied
IIN
L
VS
IIND
Cout
IGND
13

14. Buck topology – ON time
L
IIND
On
Vsw
IM
ID
IL
14

15. Buck topology – Off time
L
IIND
Off
Vsw
IM
ID
IL
15

16. Current/Voltage Waveforms
S1 Vsw
L1 IS1
V2
V1
+
+
IL
IS2
S2
IL
16

17. Buck Example
17

18. Buck/Boost, Negative Output
VD
ISW
ID VOUT
VIN
IL RO
18

19. Negative Output Example
19

20. Continuous versus Discontinuous
 Continuous refers to continuous current in the
inductor, there is always positive current flowing
in the inductor.
Inductor current
Load Current
20

21. Continuous versus Discontinuous
 Discontinuous refers to the inductor current
going to zero during every clock cycle.
Inductor current
Load Current
21

22. Continuous versus Discontinuous
 Discontinuous mode has higher peak currents.
 Higher peak current lowers the efficiency.
 Higher peak current increases the EMI energy.
22

23. EMI considerations for the Buck
 EMI stands for ElectroMagnetic Interference and
is the result of noise generated by switching
devices.
 EMI has two components, radiated and
conducted.
 Radiated refers to the EMI that is “broadcast” into
the air by the module.
 Conducted refers to EMI on the power line
emitted by the module.
23

24. EMI Considerations for the Buck
 The buck has one switching point, the common
point of the two switches and the inductor.
 A simple RC snubber at this switching point is
the most common method of reducing EMI (both
conducted and radiated).
24

25. Reduction of EMI
IIN
Snubber
L
VS
IIND
Cout
IGND
25

26. Effect of Snubber on VS(t)
VS Ringing causes big EMI numbers
No snubber
Snubber lows frequency
and amplitude of ringing
With Snubber
50 100 150 T (ns)
26

27. FLYBACK
27

28. Topology
28

29. Topology Applied
IP IS
VIN
+ +
VP VS
VD
Note: NP = # of primary turns
NS = # of secondary turns
29

30. Transformer relationship
I1 I2
N1 V1 I2
N2 V2 I1 + +
V1 N1 N2 V1
2
N1 L1
N2
2 L2
Where NX = number of turns
LX = inductance of winding
30

31. Flyback topology – ON time
D1
+ 1
+
4
- +
IQ1
C2 Output DC
Input DC C1
- +
Q1
2
T1
3
-
- IQ1 ON OFF ON OFF
1 2
P1
T LP I Q1PK f SW VQ1
2
ID1

32. Flyback topology – OFF time
D1
+ 1
-
4
+ +
ID1 C2 Output DC
Input DC C1
+ -
Q1
2
T1
3
-
- IQ1 ON OFF ON OFF
VQ1
ID1

33. Charge and discharge of the core
I
V IN
L
P VOUT
L
S
t
33

34. Drain Switching Waveforms (DM)
34

35. Drain Switching Waveforms (CM)
35

36. Diode Switching Waveforms
36

37. Current/Voltage Waveforms (discontinuous)
VIN+VO*NP/NS
VIN
VD t
IPEAK
T
IP
IS
VIN
VP
-VO*NP/NS
VOUT
VS
VIN * NS/NP
37

38. Current/Voltage Waveforms (continuous)
VIN+VO*NP/NS
VIN
VD
IPEAK
IP
IS
VIN
VP
-VO*NP/NS
VOUT
VS
VIN * NS/NP
38

39. Quasi Resonant
VIN+VO*NP/NS VIN+VO*NP/NS
VIN
VIN VD t
VD t IPEAK
T
IP
IS
IPEAK VIN
T
IP VP
-VO*NP/NS
VOUT
VS
IS VIN * NS/NP
VIN
VP Key difference between a
discontinuous mode flyback and
QR flyback:
-VO*NP/NS 1) There is no dead time in QR
flyback.
2) QR flyback is a variable frequency
VOUT
scheme
VS
VIN * NS/NP
39

40. EMI considerations for a Flyback
 There are two commutation point in a flyback
 The primary side power switch.
 The secondary side diode switch
 EMI is created only if there is a high frequency
power dissipation event.
 For DM, the current is ~zero when the switch
turns on and the diode turns off.
 Most of the EMI is generated when the switch
turns off and the diode turns on (the current is
highest).
40

41. Reducing EMI
 High current tracks should be as short as possible
 Area enclosed by high current loops, as indicated in red
should be minimized
 It is recommended to place high current tracks close
each to other to compensate magnetic field and reduce
parasitic inductance
 Use snubber to decrease dV/dt. Snubbers should be
placed with minimum trace lengths
 Increase capacitance between primary and secondary
side of the transformer. Higher Leakage inductance
helps!!
 Connect the VIPer Drain to the deepest primary winding
41

42. Reducing EMI
VIN
+ +
VP VS
42

43. Auxiliary Supply
VOUT = < 40V
VIN = 160V
VAUX = 12V
43

44. Why Auxiliary Supply (1/2)
 The PWM control loop uses 10V/5mA for power.
 If the power supply is the input bus (rectified line
voltage) and VDD is ~10V then the PWM loop
will draw (160V-10V)*5mA=7.5W
 The secondary output can’t be used because
galvanic isolation is required
 Auxiliary supply allows low power consumption
and galvanic isolation.
 Cost is low.
44

45. Why Auxiliary Supply (1/2)
 Transformer action will also apply between the
secondary voltage and the auxiliary voltage.
 Fault tolerence when reference/opto fails: No
overvoltage seen at output.
 Short circuit behavior: with aux winding the max
output power is limited, no need to oversize
secondary side components.
45

46. Flyback Example
46

47. Buck Vs Flyback
Buck Flyback
 Lower cost  Higher cost
 Less components  Custom transformer
 Designed based on  Designed based on
output current output power
 Differential EMI critical  Common mode EMI
 Outputs must be critical
inaccessible to users  Users can touch output
 Single output commonly connectors or output
power stages
 Multiple outputs possible
47

48. Viper Family
48

49. Solutions for low-medium power SMPS
 The best energy saving approach
 Minimized stand-by power
 High efficiency
 The most reliable approach
 Avalanche rugged power section
 Integration of advanced protections
 Thermal shutdown sensor located on power section
 The most flexible approach
 Modular product: controller + power section
 Packages’ design and development
 The most profitable partner
 Continuous products’ innovation
 Technical support (competence centers, documentations, software)
 Excellence in quality and supply chain
49

50. Solutions for low-medium power SMPS
Primary Controllers Secondary Controllers
HV Converters
Sync. CC/CV
Rectification
REGULATE
Controller + MOSFET RECTIFY Efficiently Constant Voltage &
Current
AC VIPer Plus.
(optional)
DC
Replacement of the (Adapters,
diode Chargers,..)
DELIVER the
power to
Transformer’s
Primary
50

51. New VIPer Plus family
GND / SOURCE DRAIN + Technology
VDD DRAIN
+ Functionalities
VIPer+ + Protections
CONT / Lim
FB Function = VIPer+
51

52. + Technology
NEW
800V Power MOSFET
GND / SOURCE DRAIN
DRAIN
VDD Out
Out
VDD DRAIN On-Off On/Off
VIPER17 BR
Gate Gate
CONT CONTROL
CONT Sense Sense
FB Tmp1 Tmp1
Gnd
FB
Gnd1 Gnd
BR
SOURCE
NEW
BCD6 controller technology
52

53. + Functionalities
 Current mode converter with ADJUSTABLE IDLIM set point
 Frequency
 Fixed (60kHz or 115kHz) with JITTERING for EMI reduction
 Quasi Resonant operation with Frequency Fold-back function (x5)
 SOFT START UP: IDLIM increased cycle by cycle
 BURST MODE in low load condition with IDLIM fixed
 ADJUSTABLE IDLIM set point
 STAND BY consumption < 50 mW
53

54. + Protections
 Over voltage protection (OVP)
AUTO RESTART
 2nd over current protection (2nd OCP) MODE
after every fault
 Over load protection (OLP) condition
 Over temperature protection + hysteresis (OTP)
 Brown out protection
 Max Duty Cycle: 70%
54

55. SMPS topology and main applications
High features - Isolated Fly-back
VIPer17 VIPer27 VIPer37 Auxiliary PS, STB, DVD, Games console, LCD TV,
major appliances, Motor control, Power Meter,
Chargers, Adapters, PC Stand-by
Quasi Resonant - Isolated Fly-back
VIPer15 VIPer25 VIPer35 Auxiliary PS, STB, DVD, Games console, LCD TV,
major appliances, Motor control, Power Meter,
Chargers, Adapters, PC Stand-by
VIPer28 VIPer38 Peak Power Isolated Fly-back
DVD, Printer, ATX
Non Isolated converters
VIPer06 VIPer16 VIPer26 Home appliances, Small appliances, Lighting, Power
meter
DIP7 DIP7 DIP7 Basic features – Isolated Fly-back
SDIP10 Auxiliary PS, STB, DVD, Games console, LCD TV,
SSO10 SO16N SO16N
major appliances, Motor control, Power Meter,
Chargers, Adapters, PC Stand-by
1W……. …….15W(1) / 30W(2)
55

56. Main features
Basic features VIPer x7 VIPer x8 VIPer x5 VIPer x6
PWM operations Fixed Frequency (60 or 115kHz) with Fixed Frequency
Quasi Resonant (301 or 60 or 115kHz)
with settable IDLIM Jittering
with Jittering
800V Extra Power Simplified
Avalanche Rugged Brown out Brown out Non Isolated
Timer
loop
Burst Mode Over Voltage No auxiliary
Over
Temperature Over Load Delay Feedback
shut down disconnection
Soft start 2° OCP Auto restart
(fixed time)
Latched a
Auto restart Feedback
disconnection
(option only for VIPer06)
Latched OVP
(option for VIPer25LLD)
(1) 30kHz available only for VIPer06
56

57. HV Converter Portfolio
+ Roadmap
730V
30 18 5.5 3 1 620V
1 W (3)
VIPer22
VIPer12 VIPer50 VIPer100 VIPer53
VIPer20
30 24 7 4.5 3 1
800 V
Av.Rug.
30 mW(3) CTRL
VIPer17 VIPer27 VIPer37 VIPer x7
30 mW(3) CTRL
VIPer15 VIPer25 VIPer x5
30 mW(3)
CTRL
VIPer28 VIPer x8
30 mW(3)
CTRL
VIPer06 VIPer16 VIPer26 VIPer x6
4W(1) / 8W(2) 6W(1) / 12W(2) 12W(1) / 24W(2) 15W(1) / 30W(2) 20W(1) / 35W(2) 30W(1) / 50W(2)
SSO10 & DIP7 SO16N & DIP7 SO16N & DIP7 SDIP10
(1) Open frame, VIN = 85 - 264VAC , under development, SOP planned within 2011
(2) Open frame, VIN = 230VAC ±20%,
(3) Achievable consumption at no load with Vin 264VAC
57

58. Tools availability
Training Application Evaluation e-Design
Datasheet Spreadsheet Spice Model
(slides) Notes Boards Studio
VIPer17 Yes Yes Yes Yes Yes Yes Yes
VIPer27 Yes Yes Yes Yes Yes Yes Yes
Under Under Under Under
VIPer37 Preliminary Yes
development development development development
--
Under Under Under Under
VIPer06 Preliminary Yes
development development development development
--
VIPer16 Yes Yes Yes Yes Yes Yes Yes
VIPer26 Yes Yes Yes Yes Yes Yes --
Under Under
VIPer15 Yes Yes Yes Yes
development development
--
Under
VIPer25 Yes Yes Yes Yes
development
Yes --
Under --
VIPer28 Yes Yes Yes Yes Yes
development .
58

59. Evaluation Boards and ANs
VIPer 17 Order code Topology Input VAC Output Output Relevant AN Reference
Isolated
VIPER17LN STEVAL-ISA058V1 85-265 5W 5V / 1A AN2864 Stand-by PSU
Fly-back
Isolated
VIPER17HN STEVAL-ISA060V1 85-265 6W 12V / 0.5A AN2753 Stand-by PSU
Fly-back
Isolated Cell Phone
VIPER17HN EVLVIP17-5WCHG 90-265 5W 5V / 1A AN2840
Fly-back Battery Charger
Isolated
VIPER17HN STEVAL-ILL017V1 220 ±20% 3.5W 7V / 500mA AN2811 Led Driver
Fly-back
Isolated 5V / 500mA
VIPER17HN STEVAL-ISA062V1 85-265 5.5W AN2934 General Purpose
Fly-back 12V / 250mA
Isolated High Power
VIPER17HN EVLVIP27-7WLED 100-264 3.5W 10V / 350mA AN3212
Fly-back Factor Led Driver
VIPer 27 Order code Topology Input VAC Output Output Relevant AN Reference
Isolated
VIPER27LN EVLVIP27L-12WS 85-265 12W 5V / 2.4A AN2929 Auxiliary PSU
Fly-back
Isolated
VIPER27HN EVLVIP27H-12SB 85-265 11W 5V / 2.2A AN3011 Auxiliary PSU
Fly-back
Isolated High Power
VIPER27HN EVLVIP27-7WLED 100-264 7W 10V / 750mA AN3212
Fly-back Factor Led Driver
VIPer 37 Order code Topology Input VAC Output Output Relevant AN Reference
Isolated
VIPER37xx TBD 85-265 5V / 3A
Fly-back
Isolated
VIPER37xx TBD 85-265 12V / 1.3A
Fly-back
59

60. Evaluation Boards and ANs
VIPer 06 Order code Topology Input VAC Output Output Relevant AN Reference
12V / 300mA
VIPER06LS Non isolated
Under development 85-265 option TBD Home appliance
VIPER06HS Fly-back
( 5V /800mA)
Isolated
Under development 85-265 TBD TBD Home Appliance
Fly-back
VIPer 16 Order code Topology Input VAC Output Output Relevant AN Reference
Non isolated 12V / 5V (post
VIPER16LN STEVAL-ISA010V1 85-500 1.8W AN2872 Power Meter
buck converter reg.) / 150mA
Non Isolated AN3028
VIPER16LN EVLVIP16L-4WFN 85-265 4.5W 16V / 280mA Home appliance
Fly-back draft
Non Isolated - 5V / 400mA,
VIPER16LN STEVAL-ISA071V1 85-265 4W UM0920 Home appliance
Fly-back +7V / 160mA
Isolated Home appliance
VIPER16LN EVLVIP16L-5WFL 85-265 5W 12 / 350mA databrief
Fly-back Auxilairy PSU
Non Isolated 12V / 5V (post Small Home
VIPER16LD EVLVIP16LD-1W5 85-265 1.8W databrief
buck converter reg.) / 150mA Appliance
Non Isolated
VIPER16HN EVLVIP16H-4WFN 85-265 4.5W 16V / 280mA databrief Home appliance
Fly-back
VIPer 26 Order code Topology Input VAC Output Output Relevant AN Reference
Primary
VIPER26LD STEVAL-ISA081V1 Regulation 85-265 12.5W 12V, 3.3V / 1A UM0984 Home appliance
Fly-back
60

61. Evaluation Boards and ANs
VIPer 15 Order code Topology Input VAC Output Output Relevant AN Reference
Quasi-
Resonant AN3160
VIPER15LN STEVALVIP15L-6W 90-265 VAC 6W 12V, 500mA Auxiliary PSU
Isolated draft
Fly-back
Quasi-
Resonant
VIPER15LN EVLVIP15L-5WSB 90-265 VAC 5W 5V, 1A TBD Auxiliary PSU
Isolated
Fly-back
VIPer 25 Order code Topology Input VAC Output Output Relevant AN Reference
Quasi-
Auxiliary PSU
Resonant AN3286
VIPER25LN EVLVIP25L-10WSB 85-265 VAC 10W 5V, 2A STB
Isolated draft
Power Meter
Fly-back
VIPer 28 Order code Topology Input VAC Output Output Relevant AN Reference
Isolated Auxiliary PSU
VIPER28LN EVLVIPER28L-10W 85-265 VAC 12W 5V, 2.4A AN2950
Fly-back Printer
61

62. VIPer06 / 16 /26
Main Features Pin description
 800V, avalanche rugged power MOSFET
 PWM controller with drain current limit IDlim
 Adjustable current limit,IDlim
 Fixed frequency with Jittering
 high performance for stand-by & efficiency
 No need of auxiliary winding
 Automatic auto restart after faults
 Hysteretic thermal shutdown
 Direct feedback for non isolated SMPS
 Replacement of capacitive power supply
 GND
 Open loop protection
controller ground / power MOSFET Source
MAIN PARAMETERS
Power MOSFET CONTROLLER  VDD
(SuperMESH)
Main parameters (BCD6S)
controller supply voltage / ICHARGE output current
Break down voltage [V] 800  LIM
Current limit set-up, IDlim .
RDSon [Ohm] 30 /24 / 7
 FB
VDD [V] 9 ÷ 23 direct voltage feedback (in case of non isolated
SMPS)
FOSC [KHz] 30 or 60 or 115
 COMP
Max IDlim [mA] 420 / 740 Compensation network.
RTHJ-A [°C/W] (1) 80 Current loop feedback in case of isolated SMPS
 N.A.
POUT [W] @ 85-265 VAC 4 / 6 / 12
Not Available for user. (It can be connected to GND)
(1) Package SO16N, 100mm2 of Cu
 N.C.
(2) Open Frame
Not Connected
62

63. Schematics with VIPerx6
FLY-BACK / Fixed Freq.
VIPer06 / 16 / 26
NON ISOLATED
Simplified feedback loop
R3, R4
R1 D1 L1 T1 D3 VOUT
+ No Need auxiliary winding
R2 C6 + C4
C5
C1 + C2 + D2
GND
Low cost EMI filter
C1, C2, L1
- VIPER x6
DRAIN R3
Low cost clamp components
Controller
FB R2,D2,C6
GND COMP LIM VDD
R4 Short circuit protection
C3 C4 (automatic restart)
Default current limit
400mA / 700mA
63

64. Schematics with VIPerx6
FLY-BACK / FF
VIPer06 / 16 / 26
NON ISOLATED
Simplified feedback loop
R3, R4
R1 D1 L1 T1 D3 VOUT
+ No Need auxiliary winding
R2 C6 + C4
C5
C1 + C2 + D2
GND
Low cost EMI filter
C1, C2, L1
- VIPER x6
DRAIN R3
Low cost clamp components
Controller
FB R2,D2,C6
GND COMP LIM VDD
R4 Short circuit protection
C3 C4 (automatic restart)
RLIM
Current limit set-up - RLIM
<400mA or <700mA
64

65. Schematics with VIPerx6
FLY-BACK / FF
VIPer06 / 16 / 26
NON ISOLATED
Simplified feedback loop
R3, R4
R1 D1 L1 T1 D3 VOUT
+ No Need auxiliary winding
R2 C6 + C4
C5
C1 + C2 + D2
GND
Low cost EMI filter
C1, C2, L1
- VIPER x6
R5
DRAIN R3
D4
Low cost clamp components
Controller
FB R2,D2,C6
GND COMP LIM VDD
R4 Short circuit protection
C3 C4 (automatic restart)
Feedback disconnection
(automatic restart)
Default current limit
400mA / 700mA
VOUT ≥ 12 V
Stand-by optimization , 30 mW
D4, R5
65

66. Schematics with VIPerx6
FLY-BACK / FF
VIPer06 / 16 / 26
NON ISOLATED
Simplified feedback loop
R3, R4
R1 D1 L1
+ Need auxiliary winding
R2 C6 C4 + AUX
AC IN C1 + C2 + D2 T1 D3 VOUT
Low cost EMI filter
+ C1, C2, L1
- C5
GND Low cost clamp components
VIPER x6
R2,D2,C6
R5 R3
DRAIN
D4
Controller
FB Short circuit protection
(automatic restart)
GND COMP LIM VDD
R4
C3 C4 Feedback disconnection
(automatic restart)
Default current limit
400mA / 700mA
VOUT < 12 V
Stand-by optimization , 30 mW
D4, R5

67. Schematics with VIPerx6
FLY-BACK / FF
VIPer06 / 16 / 26
PRIMARY REGULATION
Simplified feedback loop
R3, R4
R1 D1 L1
+ Need auxiliary winding
R2 C6 C4 + AUX
AC IN C1 + C2 + D2 T1 D3 VOUT
Low cost EMI filter
+ C1, C2, L1
- C5
GND
R5 D4 Low cost clamp components
VIPER x6
R2,D2,C6
DRAIN
R3
Controller
FB Short circuit protection
(automatic restart)
GND COMP LIM VDD
R4
C3 C4 Feedback disconnection
(automatic restart)
Default current limit
400mA / 700mA
No need the optocoupler
Stand-by optimization , 30 mW
D4, R5

68. Schematics with VIPerx6
FLY-BACK / FF
VIPer06 / 16 / 26
ISOLATED
R1 D1 L1 Minimum components count
+
R2 C6
C1 C2
No Need auxiliary winding
AC IN + + D2 T1 D3 VOUT C4
+
- C5
Low cost EMI filter
GND
C1, C2, L1
R6 D4 C6
VIPER x6
DRAIN
Low cost clamp components
FB
R2,D2,C6
Controller
GND COMP LIM VDD Short circuit protection
C4
(automatic restart)
R5
R3
IC3 Default current limit
R4 C7 400mA / 700mA
IC2
C3 R4
68

69. Schematics with VIPerx6
FLY-BACK / FF
VIPer06 / 16 / 26
ISOLATED
R1 D1 L1 Minimum components count
+
R2 C6
C2
Need auxiliary winding
AC IN C1 + + D2 T1 D3 C4 + AUX
VOUT
+
- C5
Low cost EMI filter
GND
C1, C2, L1
R6 D4 C6
VIPER x6
DRAIN
Low cost clamp components
FB
R2,D2,C6
Controller
GND COMP LIM VDD Short circuit protection
C4
(automatic restart)
R5
R3
IC3
Feedback disconnection
R4 C7
(automatic restart)
IC2
Default current limit
C3 R4 400mA / 700mA
Stand-by optimization , 30 mW
AUX + D4, R5
69

70. VIPer17 / 27 / 37
Main Features Pin description
 800V, avalanche rugged power MOSFET *
 PWM controller with drain current limit, IDlim.
 Adjustable current limit, IDlim
 Fixed Frequency with Jittering
 High performance for stand-by & efficiency
 Integrated protections: OVP, OLP, high OCP
 Automatic auto restart after fault
 Hysteretic thermal shutdown
 Brown-out: minimum input voltage is settable
 GND
Power MOSFET CONTROLLER controller ground / power MOSFET Source
MAIN PARAMETERS
Main parameters
(SuperMESH) (BCD6S)  VDD
Break down voltage [V] 800 controller supply voltage / ICHARGE output current
 CONT
RDSon [Ohm] 24 / 7 / 4.5
OVP set-up, IDLIM set-up.
VDD [V] 9 ÷ 23  FB
current loop feedback
FOSC [KHz] 60 or 115
 BR *
Max IDlim [mA] 420 / 740 / 1050 brown out set-up
RTHJ-A [°C/W] (1) 50  N.A.
Not Available for user. (It can be connected to GND)
POUT [W] @ 85-265VAC 6 / 12 / 15
 N.C.
(1) Package SO16N and 100mm2 of Cu
Not Connected
(2) Open Frame
* BR pin has the position 10 for VIPER17LD/HD (SO16N package)
70

71. Schematics with VIPerx7
FLY-BACK / FF
VIPer17 / 27 / 37
ISOLATED
L1 30mW Stand-by
F
R2 C6
Minimum components count
AC IN C1 + C2 + D2 T1 D3
NTC VOUT
+
C5 Low cost EMI filter
GND C1,C2, L1
R6 D4 C6
VIPER x7
DRAIN
Low cost clamp components
R2,C6,D2
VDD
Controller
Default current limit
GND BR CONT FB
C4 400mA / 700mA / 1000mA
R5
R3
Short circuit protection
IC3
No need ext components
R4 C7
IC2 2nd Over Current protection
C3 R4 No need ext components
71

72. Schematics with VIPerx7
FLY-BACK / FF
VIPer17 / 27 / 37
ISOLATED
L1 30mW Stand-by
F
R2 C6
Minimum components count
AC IN C1 + C2 + D2 T1 D3
NTC VOUT
+
C5 Low cost EMI filter
GND C1,C2, L1
R6 D4 C6
VIPER x7
DRAIN
Low cost clamp components
R2,C6,D2
VDD
Controller
Current limit set-up - RLIM
GND BR CONT FB
C4 <400mA or <700mA or <1000mA
R5
R3
Short circuit protection
IC3
No need ext components
R4 C7
RLIM IC2 2nd Over Current protection
C3 R4 No need ext components
72

73. Schematics with VIPerx7
FLY-BACK / FF
VIPer17 / 27 / 37
ISOLATED
L1 30mW Stand-by
F
R2 C6
Minimum components count
AC IN C1 + C2 + D2 T1 D3
NTC VOUT
DOVP +
C5 Low cost EMI filter
GND C1,C2, L1
R6 D4 C6
VIPER x7
DRAIN
Low cost clamp components
ROVP
R2,C6,D2
VDD
Controller
Current limit set-up - RLIM
GND BR CONT FB
C4 <400mA or <700mA or <1000mA
R5
R3
Short circuit protection
IC3
No need ext components
R4 C7
RLIM IC2 2nd Over Current protection
C3 R4 No need ext components
Over Voltage Protection (VOUT)
RLIM , ROVP , DOVP
73

74. Schematics with VIPerx7
FLY-BACK / FF
VIPer17 / 27 / 37
ISOLATED
L1 30mW Stand-by
F
R2 C6
Minimum components count
AC IN C1 + C2 + D2 T1 D3
NTC VOUT
+
C5 Low cost EMI filter
GND C1,C2, L1
R6 D4 C6
VIPER x7
DRAIN
Low cost clamp components
R2,C6,D2
R7 VDD
Controller
Default current limit
GND BR CONT FB
C4 400mA / 700mA / 1000mA
R5
R3
Short circuit protection
IC3
No need ext components
R4 C7
R8
IC2 2nd Over Current protection
C6 C3 R4 No need ext components
Brown out set-up (VINDC)
R7,R8, C6
74

75. Schematics with VIPerx7
FLY-BACK / FF
VIPer17 / 27 / 37
ISOLATED
L1 30mW Stand-by
F
R2 C6
Minimum components count
AC IN C1 + C2 + D2 T1 D3
NTC VOUT
DOVP +
C5 Low cost EMI filter
GND C1,C2, L1
R6 D4 C6
VIPER x7
DRAIN
Low cost clamp components
ROVP
R2,C6,D2
R7 VDD
Controller
Current limit set-up - RLIM
GND BR CONT FB
C4 <400mA or <700mA or <1000mA
R5
R3
Short circuit protection
IC3
No need ext components
R4 C7
R8
RLIM
IC2 2nd Over Current protection
C6 C3 R4 No need ext components
Over Voltage Protection (VOUT)
RLIM , ROVP , DOVP
Brown out set-up (VINDC)
R7,R8, C6
75

76. VIPer28
Main Features Pin description
 800V, avalanche rugged power MOSFET
 PWM controller with drain current limit, IDlim.
 Adjustable current limit, IDlim
 Fixed Frequency with Jittering
 High performance for stand-by & efficiency
 Integrated protections: OVP, OLP, high OCP
 Automatic auto restart after fault
 Hysteretic thermal shutdown
 Extra Power Management
 GND
Power MOSFET CONTROLLER controller ground / power MOSFET Source
MAIN PARAMETERS
Main parameters
(SuperMESH) (BCD6S)  VDD
Break down voltage [V] 800 controller supply voltage / ICHARGE output current
 COMP
RDSon [Ohm] 7
OVP set-up, IDLIM set-up.
VDD [V] 9 ÷ 23  FB
current loop feedback
FOSC [KHz] 60 or 115
 EPT
Max IDlim [mA] 850 Extra Power Time set-up
RTHJ-A [°C/W] (1) 50  N.A.
Not Available for user. (It can be connected to GND)
POUT [W] @ 85-265VAC 12
 N.C.
(1) Package SO16N and 100mm2 of Cu
Not Connected
(2) Open Frame
76

77. Schematics with VIPerx8
FLY-BACK / FF
VIPer28
ISOLATED
L1 30mW Stand-by
F
R2 C6
Minimum components count
AC IN C1 + C2 + D2 T1 D3
NTC VOUT
+
C5 Low cost EMI filter
GND C1,C2, L1
R6 D4 C6
VIPER x8
DRAIN
Low cost clamp components
R2,C6,D2
VDD
Controller
Default current limit
GND EPT CONT FB
C4 400mA / 700mA / 1000mA
R5
R3
Short circuit protection
IC3
No need ext components
R4 C7
CEPT
IC2 2nd Over Current protection
C3 R4 No need ext components
Extra Power Timer
CEPT
77