EB1125

EV4050A-S-00A
Universal Input, 40V/115mA
Off-line Non-isolated LED Driver
Evaluation Board
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP4050A is a constant current LED driver
with an integrated 500V MOSFET. It is
designed specifically for energy efficient and
low-cost LED bulb replacement applications.
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The EV4050A-S-00A Evaluation Board is
designed to demonstrate the capabilities of
MP4050A as an off-line, non-isolated LED
driver which can load 40V/115mA LEDs in
universal input voltage (85VAC to 265VAC,
50Hz/60Hz).
The EV4050A-S-00A has an excellent
efficiency and meets IEC61000-4-5 surge
immunity and EN55015 conducted EMI
requirements. It has various protections, like
integrated thermal current foldback, VCC
under-voltage lockout (UVLO), open LED
protection (OLP), short-circuit protection (SCP),
and over-temperature protection (OTP). All of
there features make MP4050A an ideal solution
for simple, off-line and non-isolated LED
applications.
ELECTRICAL SPECIFICATION
Parameter
Input Voltage
Output Voltage
Output Current
Efficiency
Symbol
Value
Units
VIN
VOUT
IOUT
η
85 to 265
40
115
>85
VAC
V
mA
%
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Constant Current LED Driver
Integrated 500V/8Ω MOSFET
Low VCC Operating Current
Maximum Frequency Limit
Audible Noise Restrain
Internal High-Voltage Current Source
Internal 200ns Leading Edge Blanking
Integrated Thermal Current Foldback
Thermal Shutdown (Auto Restart with
Hysteresis)
VCC Under Voltage Lockout with Hysteresis
Open LED Protection
Short Circuit Protection
Auto-Restart Function
APPLICATIONS
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AC/DC or DC/DC LED driver application
General Illumination
Industrial Lighting
Automotive/Decorative LED Lighting
All MPS parts are lead-free, halogen free, and adhere to the RoHS
directive. For MPS green status, please visit MPS website under Quality
Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
Warning: Although this board is designed to satisfy safety
requirements, 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.
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
1
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
EV4050A-S-00A EVALUATION BOARD
TOP VIEW
BOTTOM VIEW
(L x W x H) 29mm x 19mm x 18mm
Board Number
MPS IC Number
EV4050A-S-00A
MP4050AGS
EVALUATION BOARD SCHEMATIC
C5 51pF/50V
U1
L
L1
1mH/0.1A
FR1
8
7
R5
10/1W
6
10k/0805
5
BD1
MB6S/600V/0.5A
C2
4.7uF/400V
C3
4.7uF/400V
NC
VCC
DRAIN
PRO
NC
GND
NC
SOURCE
1
C1 2.2uF/10V
R2
R1 15.4k/1%
2
3
R3
4
3.3/1%/1206
MP4050AGS
R4
3.3/1%/1206
330k/1%/1206
L2
40V/0.115A
4.7mH/0.24A
LED+
C4
47uF/50V
R6
200k
D1
WUGC10JH/600V/1A
LED-
N
Figure 1—Schematic
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
2
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
PCB LAYOUT (SINGLE-SIDED)
Figure 2—Top Layer
Figure 3—Bottom Layer
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
3
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
CIRCUIT DESCRIPTION
The EV4050A-S-00A is configured to deliver a
constant 115mA current at an output voltage of
40VDC. The EVB is designed for driving LEDs
with a constant current (CC) in high-side buck
topology. The simplicity and low component
count of EV4050A-S-00A make the demo board
ideal for space constrained and cost sensitive
application such as GU10 size lamps.
FR1 and BD1 compose the input stage. FR1 is
used to protect for the component failure or some
excessive short events, also it can restrain the
inrush current.
C2 L1 and C3 compose π filter to guarantee the
conducted EMI meet standard EN55015. C2 and
C3 are also used for energy storage reducing line
noise and protecting against line surge. R5 is an
optional parallel resistor on the board across L1
which damps the resonance of the π filter.
C1 is the VCC supply capacitor which should be
located near as IC and such as several µF is
enough.
R3, R4 are the sense resistor with 1% tolerance
for good output current precision. It’s also
recommended to use ±400PPM/C temperature
coefficient type for better output current
regulation in high temperature and low
temperature.
C5 is decoupling cap to decouple the voltage
noise spike in high side buck solution. Around
30pF is suggested to use for stable operation.
D1 is the freewheeling diode with ultrafast type.
The recovery time of <75ns should be used
which slow diodes cause excessive leading edge
current spike during star-up and affect the
efficiency. Ultrafast (trr<75ns) diode such as
WUGC10JH or EGC10GH are recommended.
R1 and R2 are the divided resistors which detect
the output voltage for fault protection. It’s
suggested to use the 1% tolerance. The upper
divided resistor R2 is recommended to have a
minimum size of SMD 1206 package. The PRO
pin time constant should be less than 1µs which
is related with R1 and R2 value.
L2 is the power inductor which could use the low
cost drum core. However, drum core have the
open magnetic path which can be shored by a
metal enclosure which reduces the effective
inductance and requires the value to be adjusted
to take this into account when placed inside the
final enclosure.
C4 is the output filter capacitor which is to
smooth the inductor current and limit the output
current ripple and ensure high frequency current
flow within as small as a loop area as possible to
reduce EMI. 105C or above rated capacitor
should be choose in small size application for
long life.
The dummy load R6 is used to regulator the
output voltage within the designed value in open
lamp protection.
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
4
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
EV4050A-S-00A BILL OF MATERIALS
Qty
Ref
Value
Description
Package
Manufacturer
1
C1
2.2µF
Ceramic Capacitor,
10V, X7R
0603
muRata
4.7µF
Capacitor;400V;20%
DIP
Beryl
47µF
Capacitor;50V;20%
Ceramic Capacitor,
50V, C0G
DIP
Jianghai
0603
TDK
1
C2,
C3
C4
1
C5
51pF
1
BD1
MB6S
Diode;600V;0.5A
SOIC-4
1
1
1
1
1
1
WUGC10JH
10Ω
1mH
4.7mH
15.4kΩ
330kΩ
Diode;600V;1A
Resistor;5%;1W
Inductor;100mA
Inductor;240mA
Film Resistor;1%
Film Resistor;1%
3.3Ω
1
1
D1
FR1
L1
L2
R1
R2
R3,
R4
R5
R6
10kΩ
200kΩ
1
U1
MP4050AGS
2
2
Manufacturer_P/N
GRM188R71A225KE15D
4.7µF/400V
CD263-50V47
C1608C0G1H510JT
SMA
DIP
DIP
DIP
0603
1206
Taiwan
Semicondutor
Diodes
Yageo
Bangdayuan
Wurth
Yageo
Yageo
WUGC10JH
FKN1WSJT-52-10R
CKL0510-102
7447724472
RC0603FR-0715K4L
RC1206FR-07330KL
Film Resistor;1%
1206
Yageo
RC1206FR-073R3L
Film Resistor;5%
Film Resistor;5%
Constant Current
LED Driver
0805
0603
Yageo
Yageo
RC0805JR-0710KL
RC0603JR-07200KL
SOIC-8
MPS
MB6S
MP4050AGS-Z
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
5
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
EVB TEST RESULTS
Performance Data
TA=+25°C, unless otherwise noted.
Surge Test
Line to Line 1kV surge testing is completed according to IEC61000-4-5.
Input voltage is 220VAC/50Hz and operation is verified as following each surge event.
Surge Level
(V)
Input Voltage
(VAC)
Injection Location
Injection Phase
(°)
Test Result
(Pass/Fail)
1000
-1000
1000
-1000
1000
-1000
1000
-1000
220
220
220
220
220
220
220
220
L to N
L to N
L to N
L to N
L to N
L to N
L to N
L to N
0
0
90
90
180
180
270
270
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
6
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
Conducted EMI Test
EV4050A-S-00A comply the EN55015 requirement.
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
7
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
EVB Test Results
Performance waveforms are tested on the evaluation board.
VIN=115VAC/60Hz, VOUT=40V, ILED=115mA, TA=25°C, unless otherwise noted.
Steady State
Output Current Ripple
Soft Start
VDS
100V/div.
VBUS
100V/div.
IL
100mA/div.
IL
100mA/div.
IOUT
10mA/div.
Turn On Delay
Shutdown
Short Circuit Protection
VBUS
100V/div.
VBUS
100V/div.
VSOURCE
50V/div.
IOUT
50mA/div.
IOUT
50mA/div.
IL
100mA/div.
Short Circuit Protection
Entry & Recovery
VOUT
10V/div.
IL
100mA/div.
Open LED
Protection Entry
Open LED
Protection Recovery
VOUT
20V/div.
VOUT
20V/div.
IL
100mA/div.
IL
100mA/div.
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
8
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
EVB TEST RESULTS (continued)
Performance waveforms are tested on the evaluation board.
VIN=230VAC/50Hz, VOUT=40V, ILED=115mA, TA=25°C, unless otherwise noted.
Steady State
Output Current Ripple
Soft Start
VDS
100V/div.
VBUS
100V/div.
IL
100mA/div.
IL
100mA/div.
Turn On Delay
Shutdown
VBUS
100V/div.
VBUS
100V/div.
IOUT
50mA/div.
IOUT
50mA/div.
Short Circuit Protection
Entry & Recovery
Short Circuit Protection
VSOURCE
100V/div.
IL
50mA/div.
Open LED
Protection Entry
Open LED
Protection Recovery
VOUT
20V/div.
VOUT
20V/div.
IL
100mA/div.
IL
100mA/div.
VOUT
10V/div.
IL
100mA/div.
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
9
EV4050A-S-00A – OFF LINE, NON-ISOLATED LED DRIVER
QUICK START GUIDE
1. Preset Power Supply to 85VAC  VIN  265VAC.
2. Turn Power Supply off.
3. Connect the Line and Neutral terminals of the power supply output to L and N port. For threewire input application, make LED- connected to Earth.
4. Connect Load to:
a. Positive (+): LED+
b. Negative (–): LED5. Turn Power Supply on after making connections.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV4050A-S-00A Rev.1.0
www.MonolithicPower.com
4/28/2015
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
10
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