Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Title
Reference Design Report for 4.5 W Power
Factor Corrected LED Driver (Non-Isolated
Buck Boost) Using LinkSwitchTM-PL
LNK458KG
Specification 85 VAC – 135 VAC Input; 35 V, 130 mA Output
Application LED Driver for E17 Lamp Replacement
Author Applications Engineering Department
Document
Number RDR-271
Date June 8, 2011
Revision 1.0
Summary and Features
Single-stage power factor corrected and accurate constant current (CC) output
Low cost, low component count and small PCB footprint solution
Highly energy efficient, >85 % at 115 VAC input
Superior performance and end user experience
Fast start-up time (<300 ms) – no perceptible delay
Integrated protection and reliability features
Single shot no-load protection / output short-circuit protected with auto-recovery
Auto-recovering thermal shutdown with large hysteresis protects both components and PCB
No damage during brown-out conditions
PF >0.95 at 115 VAC
Meets EN55015 conducted EMI
%A THD <15% at 115 VAC
Meets IEC ring wave, differential line surge and EN55015 conducted EMI
No potting required up to 90 ºC internal ambient
PATENT INFORMATION
The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered
by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A
complete list of Power Integrations' patents may be found at www.powerint.com. Power Integrations grants its customers a license under
certain patent rights as set forth at <http://www.powerint.com/ip.htm>.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 2 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Table of Contents
1Introduction ................................................................................................................. 4
2Power Supply Specification ........................................................................................ 7
3Schematic ................................................................................................................... 8
4Circuit Description ...................................................................................................... 9
4.1Input EMI Filtering ............................................................................................... 9
4.2Buck Boost using LinkSwitch-PL ......................................................................... 9
4.3Output Feedback ............................................................................................... 10
4.4Disconnected Load Protection ........................................................................... 10
4.5Reference Design Kit ........................................................................................ 10
5PCB Layout .............................................................................................................. 12
6Bill of Materials ......................................................................................................... 15
6.1Lamp Bill of Materials ........................................................................................ 15
6.2LED Load Bill of Materials ................................................................................. 15
7Inductor Specification ............................................................................................... 16
7.1Electrical Diagram ............................................................................................. 16
7.2Electrical Specifications ..................................................................................... 16
7.3Materials ............................................................................................................ 16
7.4Inductor Build Diagram ...................................................................................... 17
7.5Inductor Construction ........................................................................................ 17
8Inductor Illustration ................................................................................................... 18
9Inductor Design Spreadsheet ................................................................................... 21
10Performance Data ................................................................................................. 23
10.1Active Mode Efficiency ...................................................................................... 23
10.2Line Regulation ................................................................................................. 24
10.3Power Factor ..................................................................................................... 25
10.4%THD ................................................................................................................ 26
10.5Harmonic Measurements .................................................................................. 27
11Thermal Performance ........................................................................................... 29
11.1Equipment Used ................................................................................................ 29
11.2Thermal Results ................................................................................................ 30
12Thermal Scans ...................................................................................................... 31
13Waveforms ............................................................................................................ 32
13.1Drain Voltage and Current, Normal Operation ................................................... 32
13.2Drain Voltage and Current Start-up Profile ........................................................ 33
13.3Output Voltage Start-up Profile .......................................................................... 35
13.4Drain Voltage and Current Start-up Short Profile .............................................. 36
13.5Line Transient Response ................................................................................... 37
13.6Brown-out .......................................................................................................... 39
13.7Start-up No-load ................................................................................................ 40
13.8Line Surge Waveform ........................................................................................ 41
14Line Surge ............................................................................................................. 42
15Conducted EMI ..................................................................................................... 43
15.1Equipment: ........................................................................................................ 43
15.2EMI Test Set-up ................................................................................................ 43
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 3 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
16Revision History .................................................................................................... 46
Important Note:
Although this board is designed to satisfy safety requirements for non-isolated LED
driver, the engineering prototype has not been agency approved. Therefore, all testing
should be performed using an isolation transformer to provide the AC input to the
prototype board.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 4 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
1 Introduction
This document is an engineering report describing a non-isolated LED driver (power
supply) utilizing a LNK458KG from the LinkSwitch-PL family of devices.
The RD-271 provides a single constant current output of 130 mA over an LED string
voltage of 35 V.
The board was optimized to operate over the low AC input voltage range (85 VAC to 135
VAC, 47 Hz to 63 Hz). LinkSwitch-PL based designs provide a high power factor (>0.9)
meeting current international requirements.
The form factor of the board was chosen to meet the requirements for standard pear
shaped (E17) LED replacement lamps. The output is non-isolated and requires the
mechanical design of the enclosure to isolate the output of the supply and the LED load
from the user.
The document contains the power supply specification, schematic, bill of materials,
transformer documentation, printed circuit layout, and performance data.
Figure 1 – Size of Populated Circuit Board Photograph.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 5 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 2 – Populated Circuit Board Retrofitted Inside A17 Bulb.
Figure 3 – Reference Design Test Board with LED Load for Ease of Testing, Top.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 6 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 4 – Reference Design Test Board with LED Load for Ease of Testing, Bottom.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 7 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
2 Power Supply Specification
The table below represents the minimum acceptable performance of the design. Actual
performance is listed in the results section.
Description Symbol Min Typ Max Units Comment
Input
Voltage VIN 85 135 VAC 2 Wire – no P.E.
Frequency fLINE 47 50/60 63 Hz
Power Factor > 0.9
At any line input voltage
%ATHD < 15
Output
Output Voltage VOUT 35 V
Output Current IOUT 120 130 140 A
Total Output Power
Continuous Output Power POUT 4.5 W
Efficiency
Nominal 85 %
Measured at POUT 25oC at 115 VAC
Environmental
Conducted EMI Meets CISPR22B / EN55015
Line Surge
(OPTION 1: VR2 not populated)
Differential Mode (L1-L2)
0.5 >0.7
kV
1.2/50 s surge, IEC 1000-4-5,
Series Impedance:
Differential Mode: 2
Line Surge
(OPTION 2: VR2 populated-TVS)
Differential Mode (L1-L2)
1 >1.5
kV
1.2/50 s surge, IEC 1000-4-5,
Series Impedance:
Differential Mode: 2
Above 1.7 kV, F1 opens
Ring Wave (100 kHz)
Differential Mode (L1-L2) 2.5 >3
kV
2 short circuit
Series Impedance
Internal Ambient Temperature TAMB -40 90
oC Board level, free convection, sea
level
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 8 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
3 Schematic
Figure 5 – Schematic. Remove VR2 for Differential Line Surge Requirement of 500 V Only.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 9 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
4 Circuit Description
The LinkSwitch-PL (U1) is a highly integrated primary side controller intended for use in
LED driver applications. The LinkSwitch-PL provides high power factor in a single-stage
conversion topology while regulating the output current in a wide range of input (85 VAC -
135 VAC) and output voltage variations typical in LED driver application environment. All
of the control circuitry responsible for these functions plus a high-voltage power MOSFET
is incorporated into the device.
4.1 Input EMI Filtering
Fuse F1 provides protection against component failure. A fast 5 A rating (this being
relatively high) was needed to prevent false opening during line surges. The maximum
input voltage is clamped by RV1 and by VR2 (TVS) during differential line surges. Zener
diode VR2 can be removed for a differential line surge requirement of ≤500 V.
The AC input is full wave rectified by BR1 (vs. half wave) to achieve good power factor
and THD.
Capacitor C1, C2, C3 and differential choke L1 and L2 perform EMI filtering while the
limited total capacitance maintains high power factor. This input 2- filter network plus the
frequency jittering feature of LinkSwitch-PL allows compliance to Class B emission limits.
Resistor R1 and R2 were used to damp the resonance of the EMI filter, preventing peaks
in the EMI spectrum.
Inductor L1 and L2 are positioned after the bridge to avoid an imbalance in the EMI
scan between line and neutral. This gives also leeway to use small high-voltage
ceramic capacitors in the input filter.
Capacitor C2 is a film capacitor to achieve more than 10 dBV design margin. It
may be replaced by X7R high-voltage ceramic capacitor if EMI design margin
requirement is relaxed (<4 dBV margin)
4.2 Buck Boost using LinkSwitch-PL
The buck boost power train is composed of U1 (power switch + control), D2 (free-
wheeling diode), C6 and C7 (output capacitor), and L3 (inductor). Diode D1 was used to
prevent negative voltage appearing across the drain-source of U1 especially near the
zero-crossing of the input voltage. The bypass capacitor C4 provides the internal supply
for the device when the power MOSFET is on.
Diode D1 and D2 are low drop diodes (Schottky) to maximize efficiency.
Inductor L3 winding construction and wire gauge are optimized to minimize inter-
winding capacitance and reduces AC losses.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 10 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
4.3 Output Feedback
The output current feedback is sensed on the voltage drop across R3 and then filtered by
a low pass filter, R4 and C5, to keep the LinkSwitch-PL operating point such that the
average FEEDBACK (FB) pin voltage is 290 mV steady-state.
Resistor R5 is provisioned in parallel with R3 to allow centering of the output
current.
4.4 Disconnected Load Protection
The system is protected by VR1 if the load is not connected in order to avoid catastrophic
failure of C7 (output capacitor). Zener diode VR1 will short the output it the load is not
connected; this protection is not auto-recovering. Replace VR1 if this occurs in order to
reuse the LED driver. Note that at the system level the LED load is always connected. If
the system will be potted or enclosed tightly, VR1 might not be required.
Replace VR1 with an SCR clamp circuit it auto-recovery is required.
4.5 Reference Design Kit
The reference design is mounted with LED load as a complete kit. The load is for
illustration and can be operated at 25 ºC ambient maximum only. A loop wire can be
used for monitoring the output current via current probe or clamp.
The board can be dismantled to fit to common E17 lamps and for higher operating
temperature test condition.
Want More?
Use your smartphone and free
software from www.neoreader.com
(or any other free QR Code Reader
from your smartphone’s App Store)
and you will be connected to related
content
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 11 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 12 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
5 PCB Layout
Figure 6 – Top Printed Circuit Layout.
Figure 7 – Bottom Printed Circuit Layout.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 13 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 8 – Top Printed Circuit Layout of the Kit.
Note: Operate LED loads at 25ºC ambient only. Remove LED driver from the kit to test at
higher ambient temperature. Make sure LED is connected before power-up to avoid
fusing the non-resettable OVP protection (replace VR1 to reset the driver).
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 14 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 9 – Bottom Printed Circuit Layout of the Kit.
Note: Operate LED loads at 25ºC ambient only. Remove LED driver from the kit to test at
higher ambient temperature. Make sure LED is connected before power-up to avoid
fusing the non-resettable OVP protection (replace VR1 to reset the driver).
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 15 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
6 Bill of Materials
The table below is divided into two sections namely: reference design BOM and
additional parts for load.
6.1 Lamp Bill of Materials
Item Qty Ref Des Description Mfg Part Number Manufacturer
1 1 BR1 600 V, 0.5 A, Bridge Rectifier, SMD,
MBS-1, 4-SOIC MB6S-TP Micro
Commercial
2 1 C1 33 nF, 630 V, Ceramic, X7R, 1210 GRM32DR72J333KW01L Murata
3 1 C2 68 nF, 250 V, Polyester Film ECQ-E2683KB Panasonic
4 1 C3 100 nF, 500 V, Ceramic, X7R, 1812 VJ1812Y104KXEAT Vishay
5 2 C4 C5
1 F, 16 V, Ceramic, X5R, 0603 GRM188R61C105KA93D Murata
6 1 C7 22 F, 50 V, Electrolytic, Low ESR,
900 m, (5 x 11.5) ELXZ500ELL220MEB5D Nippon Chemi-
Con
7 1 D1 60 V, 1 A, Diode Schottky, PWRDI 123 DFLS160-7 Diodes, Inc
8 1 D2 200 V, 1 A, Diode Schottky 1 A 200 V
PWRDI 123 DFLS1200-7 Diodes, Inc
9 1 F1 5 A, 250V, Fast, Microfuse, Axial 0263005.MXL Littelfuse
10 2 L1 L2 1200 H, 0.018 A RL-5480-1-1200 Renco
11 1 L3 330 H EE10 inductor RLPI-1002
SNX-R1577
Renco
Santronics
12 2 R1 R2
3.3 k, 5%, 1/8 W, Thick Film, 0805 ERJ-6GEYJ332V Panasonic
13 1 R3 2.2 , 1%, 1/4 W, Thick Film, 1206 ERJ-8ENF2204V Panasonic
14 1 R4 3.3 k, 5%, 1/10 W, Thick Film, 0603 ERJ-3GEYJ332V Panasonic
15 1 RV1 140 V, 12 J, 7 mm, RADIAL V140LA2P Littlefuse
16 1 U1 LinkSwitch-PL, eSOP-12P LNK458KG Power
Integrations
17 1 VR1 47 V, 5%, 1 W, DO-41 1N4756A-T Diodes Inc
18 1 VR2 350 V, 400 W, 5%, DO214AC (SMA) SMAJ350A LittlelFuse
6.2 LED Load Bill of Materials
Item Qty Ref Des Description Mfg Part Number Manufacturer
1 2 +LED LED+ Test Point, RED, THRU-HOLE MOUNT 5010 Keystone
2 3 D3 D4 D5 LED, SMD, 87.4 lm, Cree, Warm-White MX3SWT-A1-0000-000AE7 Cree
3 1 JP1 Wire Jumper, Insulated, 24 AWG, 2.2 in C2003A-12-02 Gen Cable
4 2 LINE Test Point, BLK, THRU-HOLE MOUNT 5011 Keystone
5 1 NEUT Test Point, WHT, THRU-HOLE MOUNT 5012 Keystone
6 1 ml Glue Hot Melt Adhesive V0 5/8”X2) 3748 Vo-TC 3M
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 16 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
7 Inductor Specification
7.1 Electrical Diagram
Figure 10 – Inductor Electrical Diagram.
7.2 Electrical Specifications
Primary Inductance Pins 1-3, all other windings open, measured at 100 kHz,
0.4 VRMS 330 H ±10%
7.3 Materials
Item Description
[1] Core: EE10/PC40
[2] Bobbin: EE10, Horizontal, 8 pins, (4/4), Taiwan Shulin Enterprise Co., Ltd. or Kunshan
Fengshunhe Electronics Co., Ltd Equivalent
[3] Magnet Wire: 2 X #33 AWG
[4] Loctite Super Glue Control Gel
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 17 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
7.4 Inductor Build Diagram
3
1
80T –2 X #33 AWG
Figure 11 – Inductor Build Diagram.
7.5 Inductor Construction
General Note For the purpose of these instructions, bobbin is oriented on winder such that pin 1 side
is on the left side (see illustration). Winding direction as shown is counter-clockwise.
WD1 Start at pin 3. Wind 80 turns of item [3]. Continue winding up to 5 ½ layers and
terminate it at pin 1.
Finish
Grind the core to get 330
H, ±10%. Apply tape to secure both cores. Cut pins 2, 4, 5,
6, 7 and 8. Apply adhesive item [4] to core and bobbin to prevent core from any
movement (see illustration).
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 18 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
8 Inductor Illustration
Bobbin
Preparation
General
Note
For the purpose of these
instructions, bobbin is
oriented on winder such that
pin 1 side is on the left side
(see illustration). Winding
direction as shown is
counter-clockwise.
WD1
Start at pin 3. Wind 80 turns
of item [3]. Continue winding
up to 5 ½ layers and
terminate it at pin 1.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 19 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Finish
Grind the core to get 330 H,
±10%. Apply tape to secure
both cores. Cut pins 2, 4, 5,
6, 7 and 8.
Apply adhesive item [4] to
core and bobbin to prevent
core from any movement
(see illustration).
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 20 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 12 – Inductor Assembly.
Arrow shows where
adhesive applies.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 21 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
9 Inductor Design Spreadsheet
Power Supply INFO OUTPUT UNIT LinkSwitch-PL Buck-boost Inductor Design Spreadsheet
VACMIN 85 85 V Minimum AC input voltage
VACNOM 115 115 V Nominal AC input voltage
VACMAX 132 132 V Maximum AC input voltage
FL 60 60 Hz Minimum line frequency
VO_MIN 30.00 30.0 V Minimum output voltage tolerance
VO_NOM 35.00 35.00 V Nominal Output Voltage
VO_MAX 38.00 38.00 V Maximum output voltage tolerance
IO 0.130 0.130 A Average output current specification
n 0.85 0.850 %/100 Total power supply efficiency
Z 0.5 Loss allocation factor
Enclosure Open
Frame Open
Frame Enclosure selections determines thermal conditions and maximum
power
PO 4.55 W Total output power
VD 0.40 0.4 V Output diode forward voltage drop
LinkSwitch-PL DESIGN VARIABLES
Device LNK458 LNK458 Chosen LinkSwitch-PL Device
TON 1.67 us Expected on-time of MOSFET at low line and PO
FSW 88.9 kHz Expected switching frequency at low line and PO
Duty Cycle 14.8 % Expected operating duty cycle at low line and PO
VDRAIN 245 V Estimated worst case drain voltage at VACMAX and VO_MAX
IRMS 0.129 A Nominal RMS current through the switch
IPK 0.938 A Worst Case Peak current
ILIM_MIN 1.012 A Minimum device current limit
KDP 1.25 1.25 Ratio between off-time of switch and reset time of core at VACNOM
Device LNK458 LNK458 Chosen LinkSwitch-PL Device
LinkSwitch-PL EXTERNAL COMPONENT CALCULATIONS
RSENSE 2.231
OhmsOutput current sense resistor
Standard
RSENSE 2.21
OhmsClosest 1% value for RSENSE
PSENSE 37.7 mWPower dissipated by RSENSE
ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES
Core Type EE10 EE10 Core Type
Core Part
Number Custom Core Part Number (if Available)
Bobbin Part
Number Custom Bobbin Part Number (if available)
AE 12.10 12.10 mm^2 Core Effective Cross Sectional Area
LE 26.10 26.10 mm Core Effective Path Length
AL 850 850 nH/T^2 Ungapped Core Effective Inductance
BW 6.00 6 mm Bobbin Physical Winding Width
L 5 5 Number of winding layers
TRANSFORMER PRIMARY DESIGN PARAMETERS
LP 330.7 uH Primary Inductance
LP Tolerance 5.00 5 % Tolerance of Primary Inductance
N 80 80 Turns Number of Turns
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 22 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
ALG 52 nH/T^2 Gapped Core Effective Inductance
BM
Info 3205 Gauss
Reduce BM < 3000 G. Decrease BP (increase NP) or increase core
size.
BAC
1603 Gauss Worst case AC Flux Density for Core Loss Curves (0.5 X Peak to Peak)
BP
Warning 4620 Gauss
!!! Reduce peak flux density (BP < 3600 G) by increasing NP, selecting
a bigger core or decreasing KDP; See note below
LG 0.294 mm Gap Length (Lg > 0.1 mm)
BWE 30 mm Effective Bobbin Width
L_IRMS 0.333 A RMS Curren through the inductor
OD 0.38 mm Maximum Primary Wire Diameter including insulation
INS 0.06 mm Estimated Total Insulation Thickness (= 2 * film thickness)
DIA 0.32 mm Bare conductor diameter
AWG 29 AWG Primary Wire Gauge (Rounded to next smaller standard AWG value)
CM 128 Cmils Bare conductor effective area in circular mils
CMA 384 Cmils/Amp Primary Winding Current Capacity (200 < CMA < 500)
Current Density
(J) 5.19 A/mm^2 Inductor Winding Current density (3.8 < J < 9.75 A/mm^2)
Output Parameters
IO 0.130 A Expected Output Current
PIVS 42.2 V Peak Inverse Voltage at VO_MAX on output diode
Note: Peak flux density is limited by slowly increasing the duty cycle of LinkSwitch-PL
family during start-up.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 23 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
10 Performance Data
All measurements performed at 25 ºC room temperature, 60 Hz input frequency
otherwise specified.
10.1 Active Mode Efficiency
84.0
84.5
85.0
85.5
86.0
86.5
80 85 90 95 100 105 110 115 120 125 130 135 140
AC Input (VRMS), 60 Hz
Efficiency (%)
36 V LED
39 V LED
Figure 13 – Efficiency with Respect to AC Input Voltage.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 24 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
10.2 Line Regulation
-8
-6
-4
-2
0
2
4
6
8
VAC Input
Regulation Band (%)
85 - 135 VAC
47 - 63 Hz
85 - 135 VAC
50 Hz
115 VAC
60 Hz
Figure 14 – Line Regulation, Room Temperature.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 25 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
10.3 Power Factor
0.93
0.94
0.95
0.96
0.97
0.98
0.99
80 85 90 95 100 105 110 115 120 125 130 135 140
AC Input Voltage (VRMS), 60 Hz
Power Factor
33 V LED
36 V LED
39 V LED
Figure 15 – High Power Factor within the Operating Range.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 26 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
10.4 %THD
0
5
10
15
20
25
30
80 85 90 95 100 105 110 115 120 125 130 135 140
AC Input Voltage (VRMS), 60 Hz
% ATHD
33 V LED
36 V LED
39 V LED
Figure 16 – Very Low %ATHD within the Operating Range.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 27 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
10.5 Harmonic Measurements
VAC
(VRMS)
Freq
(Hz)
V
(VRMS)
IIN
(mARMS)
PIN
(W)
115 60 114.97 50.51 5.58000
nth
order
mA
content
Base
Limit
mA/W
Actual
Limit Remarks
1 48.67
3 1.38 3.40000 37.9440 Pass
5 1.67 1.90000 21.2040 Pass
7 2.09 1.00000 11.1600 Pass
9 2.20 0.50000 5.5800 Pass
11 2.36 0.35000 3.9060 Pass
13 1.82 0.29615 3.3051 Pass
15 1.67 0.25667 2.8644 Pass
17 1.00 0.22647 2.5274 Pass
19 0.79 0.20263 2.2614 Pass
21 0.40 0.18333 2.0460 Pass
23 0.10 0.16739 1.8681 Pass
25 0.24 0.15400 1.7186 Pass
27 0.24 0.14259 1.5913 Pass
29 0.49 0.13276 1.4816 Pass
31 0.33 0.12419 1.3860 Pass
33 0.18 0.11667 1.3020 Pass
35 0.19 0.11000 1.2276 Pass
38 0.10 0.10405 1.1612 Pass
39 0.27 0.09872 1.1017 Pass
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 28 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
0
5
10
15
20
25
30
35
40
3579111315171921232527293133353739
Harmonic Order
Harmonic Content
Limits
Measured
Figure 17 – Meets EN61000-3-2 Harmonics Contents Standards for <25 W Rating.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 29 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
11 Thermal Performance
11.1 Equipment Used
Chamber: Tenney Environmental Chamber
Model No: TJR-17 942
AC Source: Chroma Programmable AC Source
Model No: 6415
Wattmeter: Yokogawa Power Meter
Model No: WT2000
Data Logger: Monogram
SN:1290492
Figure 18 – Thermal Chamber Set-up Showing Box Used to Prevent Airflow Over UUT.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 30 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
11.2 Thermal Results
Load: 36 V / 130 mA LED load. Ambient of 90 °C simulates operation inside sealed LED
replacement enclosure.
Normal Operation Device Temperature (ºC)
Component 85 V/50 Hz 100 V/50Hz 115V/60Hz
Normal OTP Normal OTP Normal OTP
Box Internal Ambient (ºC) 90 106 90 113 90 113
Bridge (BR1) 108 120 103 125 102 125
Blocking Diode (D1) 113 125 107 130 106 129
LNK458KG (U1) 120 134 112 134 111 134
Inductor Core (L3) 116 126 108 130 105 130
Output Diode (D2) 126 138 110 132 109 132
Table 1 – Thermal Data if U1 Exposed Pad is Soldered.
Normal Operation Device Temperature (ºC)
Component 85 V/50 Hz 100 V/50Hz 115V/60Hz
Normal OTP Normal OTP Normal OTP
Box Internal Ambient (ºC) 90 104 90 107 90 107
Bridge (BR1) 108 118 104 120 104 120
Blocking Diode (D1) 112 124 109 126 110 126
LNK458KG (U1) 125 133 117 135 118 135
Inductor Core (L3) 115 124 108 126 110 126
Output Diode (D2) 122 127 112 129 113 129
Table 2 – Thermal Data if U1 Exposed Pad is Unsoldered.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 31 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
12 Thermal Scans
The scan is conducted at ambient temperature of 25 ºC, 85 VAC / 47 Hz input and 35 V
LED string load.
Figure 19 – U1 Case Temperature. Figure 20 – D2 Case Temperature.
Figure 21 – L3 Temperature. Figure 22 – BR1 Case Temperature.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 32 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13 Waveforms
13.1 Drain Voltage and Current, Normal Operation
Figure 23 – 85 VAC / 47 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 2 s / div.
Figure 24 – 85 VAC / 47 Hz, 35 V LED String.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 2 ms / div.
Figure 25 – 100 VAC / 50 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 2 s / div.
Figure 26 – 115 VAC / 60 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 2 s / div.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 33 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 27 – 135 VAC / 63 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 5 s / div.
Figure 28 – 355 VAC / 63 Hz, 35 V LED String.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div
F1: VD-S, 250 V / div., 1 ms / div.
13.2 Drain Voltage and Current Start-up Profile
Figure 29 – 85 VAC / 47 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 10 ms / div.
Figure 30 – 135 VAC / 63 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 200 s / div.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 34 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 31 – 135 VAC / 63 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 10 ms / div.
Figure 32 – 135 VAC / 63 Hz, 35 V LED String.
Ch1: VDRAIN, 50 V / div.
Ch2: VSOURCE, 50 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 2 s / div.
Figure 33 – 125 °C Start-up; 135 VAC / 63 Hz;
85° Phase Angle, 35 V LED String.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 500 s / div.
Z4: IDRAIN, 305 mA / div.; 500 ns / div.
Figure 34 – 150 °C Start-up; 135 VAC / 63 Hz;
85° Phase Angle, 35 V LED String.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 500 s / div.
Z4: IDRAIN, 305 mA / div.; 500 ns / div.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 35 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13.3 Output Voltage Start-up Profile
Figure 35 – 85 VAC / 47 Hz, 35 V LED String.
Ch1: VIN, 50 V / div.
Ch2: VOUT, 10 V / div.
Ch3: IIN, 50 mA / div.
Ch4: IOUT, 50 mA / div., 50 ms / div.
Figure 36 – 135 VAC / 63 Hz, 35 V LED String.
Ch1: VIN, 50 V / div.
Ch2: VOUT, 10 V / div.
Ch3: IIN, 50 m A / div.
Ch4: IOUT, 50 mA / div., 50 ms / div.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 36 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13.4 Drain Voltage and Current Start-up Short Profile
Figure 37 – 135 VAC / 63 Hz, Output Shorted.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 1 s / div.
Figure 38 – 135 VAC / 63 Hz, Output Shorted.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 10 s / div.
Figure 39 – 135 VAC / 63 Hz, Output Shorted.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 20 ms / div.
Figure 40 – 135 VAC / 63 Hz, Output Shorted.
Ch1: VDRAIN, 100 V / div.
Ch2: VSOURCE, 100 V / div.
Ch4: IDRAIN, 0.5 A / div.
F1: VD-S, 100 V / div., 2 ms / div.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 37 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13.5 Line Transient Response
Figure 41 – 115 VAC / 50 Hz,
300 ms On – 300 ms Off.
Load: 35V LED String.
Ch1: VIN, 50 V / div.
Ch2: VOUT, 10 V / div.
Ch4: IOUT, 100 mA / div., 1 s / div.
Figure 42 – 115 VAC / 50 Hz,
1 s On - 1 s Off.
Load: 35 V LED String.
Ch1: VIN, 50 V / div.
Ch2: VOUT, 10 V / div.
Ch4: IOUT, 100 mA / div., 5 s / div.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 38 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Figure 43 – 115 VAC / 50 Hz, 0.5 Cycle-Skip.
Load: 35 V LED String.
Ch1: VIN, 50 V / div.
Ch3: IIN, 50 mA / div,100 ms / div.
Figure 44 – 115 VAC / 50 Hz, 0.25 Cycle-Skip.
Load: 35 V LED String.
Ch1: VIN, 50 V / div.
Ch3: IIN, 50 mA / div.,100 ms / div.
Figure 45 – 115 VAC / 50 Hz, 1 Cycle-Skip.
Load: 35 V LED String.
Ch1: VIN, 50 V / div.
Ch3: IIN, 50 mA / div.,100 ms / div.
Figure 46 – 115 VAC / 50 Hz, 2 Cycle-Skip.
Load: 35 V LED String.
Ch1: VIN, 50 V / div.
Ch3: IIN, 50 mA / div.,100 ms / div.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 39 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13.6 Brown-out
Input voltage slew rate of 0.1 V / s from 85-0-85 VAC / 50 Hz line input variation; no failure observed.
Figure 47 – 85 VAC / 50 Hz, 35 V LED String.
Below 75 VAC the peak current of the
load is higher than normal but the
average current is regulated at 130 mA.
Ch1: VIN, 50 V / div.
Ch2: VOUT, 5 V / div.
Ch3: IIN, 50 mA / div.,200 s / div.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 40 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13.7 Start-up No-load
This LED driver is protected by VR1 in case of no-load condition occurs in order to avoid leakage from the
output capacitor. This protection is not auto-recover; replace VR1 in case this condition occurs.
Figure 48 – 185 VAC / 63 Hz, Start-up No-load.
Ch2: VOUT, 10 V / div.
Ch4: IOUT, 100 mA / div., 1 s / div.
Figure 49 – 85 VAC / 63 Hz, Start-up No-load.
Ch2: VOUT, 10 V / div.
Ch4: IOUT, 100 mA / div., 200 ms / div.
Figure 50 – 135 VAC / 63 Hz, Start-up No-load.
Ch2: VOUT, 10 V / div.
Ch4: IOUT, 100 mA / div., 1 s / div.
Figure 51 – 135 VAC / 63 Hz, Start-up No-load.
Ch2: VOUT, 10 V / div.
Ch4: IOUT, 100 mA / div., 500 ms / div.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 41 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13.8 Line Surge Waveform
Figure 52 – 115 VAC / 60 Hz,
500 V Differential Surge.
Ch1: VIN, 200 V / div.
Ch2: VDRAIN, 10 V / div.
Ch3: VSOURCE, 10 V / div.
F1: VDS, 500 V / div., 50 s / div.
Figure 53 – 115 VAC / 60 Hz,
1 kV Differential Surge; VR2 Installed.
Ch1: VIN, 200 V / div.
Ch2: VDRAIN, 10 V / div.
Ch3: VSOURCE, 10 V / div.
F1: VDS, 500V / div., 50 s / div.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 42 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
14 Line Surge
Input voltage was set at 115 VAC / 60 Hz. Output was loaded with 35 V LED string and
operation was verified following each surge event.
Differential input line 1.2 / 50 s surge testing was completed on two test unit to
IEC61000-4-5.
Surge Level
(V)
Input
Voltage
(VAC)
Injection
Location
Injection
Phase
(°)
Test Result
(Pass/Fail)
Option 1: VR2 not installed
+500 115 L to N 0 Pass
-500 115 L to N 0 Pass
+500 115 L to N 90 Pass
-500 115 L to N 90 Pass
Option 2: VR2 installed
+1200 115 L to N 0 Pass
-1200 115 L to N 0 Pass
+1200 115 L to N 90 Pass
-1200 115 L to N 90 Pass
Differential input line ring surge testing was completed on two test unit to IEC61000-4-5.
Surge Level
(V)
Input
Voltage
(VAC)
Injection
Location
Injection
Phase
(°)
Test Result
(Pass/Fail)
Option 1: VR2 not installed
+2500 115 L to N 0 Pass
-2500 115 L to N 0 Pass
+2500 115 L to N 90 Pass
-2500 115 L to N 90 Pass
+3000 115 L to N 0 Pass
-3000 115 L to N 0 Pass
+3000 115 L to N 90 Pass
-3000 115 L to N 90 Pass
Unit passes under all test conditions.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 43 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
15 Conducted EMI
15.1 Equipment:
Receiver:
Rohde & Schwartz
ESPI - Test Receiver (9 kHz – 3 GHz)
Model No: ESPI3
LISN:
Rohde & Schwartz
Two-Line-V-Network
Model No: ENV216
15.2 EMI Test Set-up
LED driver is placed in a conical metal housing (for self-ballasted lamps; CISPR15
Edition 7.2).
Figure 54 – Conducted Emissions Measurement Set-up
Showing Conical Ground Plane Inside which UUT was Mounted.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 44 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Power Integrations
SGL
TDF
6DB
9 kHz 30 MHz
dBµV
dBµV
2 A
V
CLRW
R
1 QP
CLRW
R
24.Mar 11 13:18
RBW 9 kHz
MT 500 ms
Att 10 dB AUTO
100 kHz 1 MHz 10 MHz
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
LIMIT CHECK PASS
EN55015A
EN55015Q
Figure 55 – Conducted EMI, Maximum Steady-State Load, 115 VAC, 60 Hz, and EN55015 Limits.
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 45 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
EDIT PEAK LIST (Final Measurement Results)
Trace1: EN55015Q
Trace2: EN55015A
Trace3: ---
TRACE FREQUENCY LEVEL dBµV DELTA LIMIT dB
2 Average 95.14984736 kHz 14.69 L1 gnd
2 Average 99.0133127137 kHz 8.86 N gnd
1 Quasi Peak 190.46019728 kHz 45.86 N gnd -18.15
2 Average 192.364799253 kHz 37.68 N gnd -16.25
1 Quasi Peak 283.569280422 kHz 42.86 N gnd -17.84
2 Average 289.269022958 kHz 36.17 N gnd -14.36
1 Quasi Peak 378.424303998 kHz 43.21 N gnd -15.09
2 Average 389.890938834 kHz 33.37 N gnd -14.69
1 Quasi Peak 881.64914842 kHz 42.69 N gnd -13.30
2 Average 881.64914842 kHz 30.42 N gnd -15.57
1 Quasi Peak 983.628047757 kHz 36.36 N gnd -19.63
1 Quasi Peak 1.17656420634 MHz 42.34 N gnd -13.65
2 Average 1.17656420634 MHz 31.30 N gnd -14.69
2 Average 1.23658080545 MHz 31.28 N gnd -14.71
1 Quasi Peak 1.27405044044 MHz 41.86 N gnd -14.13
2 Average 1.33903981723 MHz 31.57 N gnd -14.42
1 Quasi Peak 1.37961406273 MHz 36.63 N gnd -19.36
1 Quasi Peak 1.43563192593 MHz 44.42 N gnd -11.57
2 Average 1.43563192593 MHz 31.34 N gnd -14.65
1 Quasi Peak 1.57012949439 MHz 40.49 N gnd -15.51
Figure 56 – Conducted EMI, Maximum Steady-State Load, 115 VAC, 60 Hz, and EN55015 Limits. Line
and Neutral Scan Design Margin Measurement.
RDR-271 4.5 W Buck Boost Power Supply Using LNK458KG 08-Jun-11
Page 46 of 47
Power Integrations, Inc.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
16 Revision History
Date Author Revision Description & changes Reviewed
08-Jun-11 JDC 1.0 Initial Release Apps & Mktg
08-Jun-11 4.5 W Buck Boost Power Supply Using LNK458KG
Page 47 of 47
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
For the latest updates, visit our website: www.powerint.com
Power Integrations reserves the right to make changes to its products at any time to improve reliability or
manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit
described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL
WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.
PATENT INFORMATION
The products and applications illustrated herein (including transformer construction and circuits external to the
products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent
applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at
www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at
http://www.powerint.com/ip.htm.
The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS,
Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, StackFET, PI Expert and PI FACTS are trademarks of Power Integrations,
Inc. Other trademarks are property of their respective companies. ©Copyright 2011 Power Integrations, Inc.
Power Integrations Worldwide Sales Support Locations
WORLD HEADQUARTERS
5245 Hellyer Avenue
San Jose, CA 95138, USA.
Main: +1-408-414-9200
Customer Service:
Phone: +1-408-414-9665
Fax: +1-408-414-9765
e-mail:
usasales@powerint.com
GERMANY
Rueckertstrasse 3
D-80336, Munich
Germany
Phone: +49-89-5527-3911
Fax: +49-89-5527-3920
e-mail:
eurosales@powerint.com
JAPAN
Kosei Dai-3 Building
2-12-11, Shin-Yokohama,
Kohoku-ku, Yokohama-shi,
Kanagawa 222-0033
Japan
Phone: +81-45-471-1021
Fax: +81-45-471-3717
e-mail: japansales@powerint.com
17 TAIWAN
5F, No. 318, Nei Hu Rd., Sec. 1
Nei Hu District
Taipei 114, Taiwan R.O.C.
Phone: +886-2-2659-4570
Fax: +886-2-2659-4550
e-mail:
taiwansales@powerint.com
CHINA (SHANGHAI)
Rm 1601/1610, Tower 1
Kerry Everbright City
No. 218 Tianmu Road West
Shanghai, P.R.C. 200070
Phone: +86-021-6354-6323
Fax: +86-021-6354-6325
e-mail:
chinasales@powerint.com
INDIA
#1, 14th Main Road
Vasanthanagar
Bangalore-560052
India
Phone: +91-80-4113-8020
Fax: +91-80-4113-8023
e-mail:
indiasales@powerint.com
KOREA
RM 602, 6FL
Korea City Air Terminal B/D, 159-6
Samsung-Dong, Kangnam-Gu,
Seoul, 135-728
Korea
Phone: +82-2-2016-6610
Fax: +82-2-2016-6630
e-mail: koreasales@powerint.com
EUROPE HQ
1st Floor, St. James’s House
East Street, Farnham
Surrey GU9 7TJ
United Kingdom
Phone: +44 (0) 1252-730-141
Fax: +44 (0) 1252-727-689
e-mail:
eurosales@powerint.com
CHINA (SHENZHEN)
Rm A, B & C 4th Floor, Block C,
Electronics Science and
Technology Building
2070 Shennan Zhong Road
Shenzhen, Guangdong,
P.R.C. 518031
Phone: +86-755-8379-3243
Fax: +86-755-8379-5828
e-mail:
chinasales@powerint.com
ITALY
Via De Amicis 2
20091 Bresso MI
Italy
Phone: +39-028-928-6000
Fax: +39-028-928-6009
e-mail:
eurosales@powerint.com
SINGAPORE
51 Newton Road,
#19-01/05 Goldhill Plaza
Singapore, 308900
Phone: +65-6358-2160
Fax: +65-6358-2015
e-mail:
singaporesales@powerint.com
APPLICATIONS HOTLINE
World Wide +1-408-414-9660
APPLICATIONS FAX
World Wide +1-408-414-9760
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Power Integrations:
RDK-271