MPS EVHF900-P-00A User manual

EVHF900-P-00A
85VAC/60Hz~420VAC/60Hz,
13.5V/300mA;8V/50mA;8V/50mA
Off-line SWITCHING Regulator
Evaluation Board
EVHF900-P-00A Rev. 1.1 www.MonolithicPower.com 1
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© 2017 MPS. All Rights Reserved.
DESCRIPTION
The HF900 is a flyback regulator with a 900V
MOSFET integrated, targeting high AC input
voltage application. The switching frequency
can be programmed with one external resistor
The EVHF900-P-00A Evaluation Board is
designed to demonstrate the capabilities of
HF900 and is also designed for off-line high
input voltage (85VAC~420VAC) application with
triple outputs (13.5V/300mA, 8V/50mA,
8V/50mA). The 8V output rail can power the
LDO for MCU power supply.
The EVHF900-P-00A has an excellent
performance and meets EN55022 conducted
EMI requirements easily with frequency jittering
function. It has various protections like Over
Temperature Protection (OTP), VCC Under
Voltage Lockout (UVLO), Over Load Protection
(OLP), Over Voltage Protection (OVP), Short
Circuit Protection (SCP) and built-in PRO pin
for extra protection setting.
ELECTRICAL SPECIFICATION
Parameter
Symbol
Value
Units
Input Voltage
VIN
85 to 420
VAC
Output1 Voltage
VOUT1
13.5
V
Output1 Current
IOUT1
300
mA
Output2 Voltage
VOUT2
8
V
Output2 Current
IOUT2
50
mA
Output3 Voltage
VOUT3
8
V
Output3 Current
IOUT3
50
mA
FEATURES
Internal Integrated 900V MOSFET
Programmable switching frequency up to
300kHz
Frequency jittering
Current-mode operation
Internal high voltage current source
Low standby power consumption via active
burst mode
Internal leading-edge blanking
Built-in soft-start function
Internal slope compensation
Built-in PRO pin pull-up auto restart function
Over-temperature protection
VCC under-voltage lockout with hysteresis
Over-voltage protection on VCC
Time-based over-load protection
Short-circuit protection
APPLICATIONS
Power supply for meter
Any high AC input voltage power supply
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.

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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EVHF900- P-00A EVALUATION BOARD
TOP VIEW
BOTTOM VIEW
(L x W x H) 74mm x 47mm x 22mm
Board Number
MPS IC Number
EVHF900-P-00A
HF900GPR

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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EVALUATION BOARD SCHEMATIC
R7
R18
D5
U3
U1
CX1
R6
R10
R12
R2
C12
R15
C14
R20
LX1
R21R22
R5
C4
R9
C7
C9
C10
R14
R19
C13
C11
D6
R16
R3
R8
R11
C8
FR1
R13
R17
U2
CX2
D1
D9
D3 D4
D7 D8
C6
VOUT3
GND3
VOUT1
GND1(L)
L
N
C15
T1
CY1
VOUT2
GND2
D2
R1
R4
1uF/25V
C2
1uF/25V
C5
C1
C3
Figure 1—Schematic

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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EVHF900-P-00A BILL OF MATERIALS
Qty
Ref
Value
Description
Packag
e
Manufacturer
Manufactuer_P/N
2
C1,
C3
47μF
Ceramic Capacitor;25V
DIP
Jianghai
CD28L-25V47
2
C2,C5
1μF
Ceramic Capacitor;
25V;X7R
0603
Murata
GRM188R71E2105KA12
D
1
C4,
2.2nF
Ceramic Capacitor;
630V;X7R
0603
Murata
GRM31BR72J222KW01L
2
C6,C8
22μF
Electroytic Cacitor;400V
DIP
Rubycon
400PX22MEFC12.5X20
1
C7
1nF
Ceramic Capacitor;
250V;X7R
0805
Murata
GRM21A7U2E102JW31D
1
C9
470μF
Ceramic Capacitor;35V
DIP
Jianghai
CD263-35V470
2
C10,
C12
100nF
Ceramic Capacitor;50V
0603
Murata
GRM188R71H104KA93D
1
C11
22μF
Electrolytic Capacitor;50V
DIP
Jianghai
CD281L-50V22
1
C13
22nF
Ceramic Capacitor;50V
0603
Murata
GRM188R71H223KA01D
2
C14,
C15
1nF
Ceramic Capacitor;16V
0603
Jianghai
GRM188R71C102KA01
2
CX1,
CX2
0.22μF
X Capacitor;275V;10%
DIP
Carli
PX224K3IC59L270D9R
1
CY1
NC
2
D1,D2
ES1D
Diode;200V;1A
SMA
Taiwan
Semiconductor
ES1D
4
D3,
D4,
D7,
D8
1N4007
Diode;1000V;1A
DO41
Diodes
1N4007
1
D5
S1ML
Diode;1000V;1A;
SMA
Diodes
S1ML
1
D6
MBRS32
00T3G
Schottky Diode;200V;3A
SMB
Onsemi
MBRS3200T3G
1
D9
BAV21W
Diode;200V;0.2A;
SOD123
Diodes
BAV21W
1
LX1
24mH
EE8, Common Choke
DIP
Emei(1)
FX0344
1
FR1
10
Fuse Resistor;5%;1/2W
DIP
CTC
FKN50SJT-52-10R
2
R1,
R4
6.8k
Film Resistor;1%
0603
Yageo
RC0603FR-076K8L
4
R2,
R6,
R10,
R12
5.1M
Film Resistor;5%;1/4W
1206
Yageo
RI1206L515JT
3
R3,
R8,
R11
2.2M
Film Resistor;5%;1/4W
1206
Royalohm
1206J0225T5E
1
R5
NC
1
R7
150k
Film Resistor;5%;1/4W
1206
Yageo
RC1206FR-07150KL
1
R9
51
Film Resistor;1%;1/4W
1206
Yageo
RC1206FR-0751RL

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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EVHF900-P-00A BILL OF MATERIALS (continued)
Qty
Ref
Value
Description
Packag
e
Manufacturer
Manufactuer_P/N
1
R13
1k
Film Resistor;1%
0603
Yageo
RC0603FR-071KL
1
R14
44.2k
Film Resistor;1%
0603
Yageo
RC0603FR-0744K2L
1
R15
215k
Film Resistor;1%
0603
Yageo
RC0603FR-07215KL
1
R16
2.49
Film Resistor;1%
0805
Yageo
RC0805FR-072R49L
1
R17
2k
Film Resistor;1%
0603
Yageo
RC0603FR-072KL
1
R18
10k
Film Resistor;1%
0603
Yageo
RC0603FR-0710KL
1
R19
20k
Film Resistor;1%
0603
Yageo
RC0603FR-0720KL
1
R20
93.1k
Film Resistor;1%
0603
Yageo
RC0603FR-0793K1L
1
R21
3.3
Film Resistor;1%;1/4W
1206
Yageo
RC1206FR-073R3L
1
R22
5.1
Film Resistor;1%;1/4W
1206
Yageo
RC1206FR-075R1L
1
T1
EE16
EE16, 2.5mH,
N1:N2:N3:N4:N5:N6=
22:170:30:16:16:26
DIP
Emei(1)
FX0418
1
U2
HF900
Flyback regulator with
900V integrated MOS
PDIP8-
7EP
MPS
HF900GPR
1
U1
EL817B
Photocoupler;1-Channel
DIP
Everlight
EL817B
1
U3
TL431
2.5V voltage reference
SOT23
Diodes
TL431
Note:
1) Emei transformer sample request please login on website: www.emeigroup.com

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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PCB LAYOUT (SINGLE-SIDED)
Figure 2—Top Layer
Figure 3—Bottom Layer

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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CIRCUIT DESCRIPTION
The EVHF900-P-00A is configured for 5W triple
outputs in power meter application. The 8V
output rail can power the LCD for MCU power
supply. The demo board is proper for three
phase input power system.
FR1 is used to protect for the component failure
or some excessive short events, also it can
restrain the inrush current.
The CX1, CX2 and LX1 compose the EMI filter to
guarantee the conducted EMI meet the EN55022
criteria. CX1 is in series with CX2 for 420VAC
input. R3, R8 and R11 are used to discharge the
energy stored in CX1 and CX2 in 1 second for
safety requirement.
D3, D4, D7 and D8 compose the input stage to
commute the AC voltage to DC voltage.
The C6 and C8 are used for energy storage
reducing line noise and protecting against line
surge. R2, R6, R10 R12 and R20 are for
balancing the voltage of C6 and C8 and also
configured for input over voltage protection.
R7, C4 and D5 are formed the RCD to restrain
the high voltage spike to protect the MOSFET.
R15 is for switching frequency setup. Normally,
the switching frequency is configured low to get
good thermal performance under high voltage
input applications. And switching frequency
should be far away form data sampling frequency
in power meter applications to avoid noise
disturbing.
C11 is the power supply capacitor and C12 is the
decoupling ceramic cap to decouple the voltage
noise spike. C12 should be located near to IC.
R21, R22 are the sense resistors with 1%
tolerance for peak current setup.
C1, C3, C9 are the output filter capacitor to
restrain the output voltage ripple. One filter could
be used for strict voltage ripple requirement.
R1, R4 are dummy load to regulate the output
voltage within designed value.
R14, R17 are configured to set the output voltage.
U1, U3, R19 and C13 compose the control loop
to feedback the output signal to FB pin and
guarantee the quick control loop response and
system stability.
Input Line wire is connected to GND of main
output for input AC frequency sample in power
meter.

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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TRANSFORMER SPECIFICATION
Electrical Diagram
NC
A
BN5
N6
Primary Secondary
N1
N2
N3
1
2
3
4
5
6
10
9
Figure 4—Transformer Electrical Diagram
Notes:
1、All winding terminals are added tube;
2、N5 is flying out from the bobbin. Terminal A is labed with black and terminal B is labed with white;
3、Remove Pin7 and Pin8；
4、Varnish the transformer.
Winding Diagram
1T
1T
1T
1T
1T
1T
N4
N6
N1
N2
N3
N5
1T
Figure 5—Winding Diagram

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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Winding Order
Winding No.
Tape Layer Number
Start & End
Magnet WireΦ(mm)
Turns
N1
1
1→NC
0.15mm * 2
22
N2
1
2→1
0.15mm * 1
170
N3
1
4→3
0.1mm * 1
30
N6
1
5→6
0.30mm * 1 TIW
26
N4
1
10→9
0.16mm * 1 TIW
16
N5
1
A→B
0.16mm* 1 TIW
16
Electrical Specifications
Electrical Strength
60 second, 60Hz, from PRI. to SEC.
4500VAC
60 second, 60Hz, from N4. to N6.
4500VAC
60 second, 60Hz, from PRI. to CORE.
2500VAC
Primary Inductance
Pins 1 - 2, all other windings open, measured at 60kHz, 0.1
VRMS
2.5mH±10%
Materials
Item
Description
1
Core: EE16, UI=2300±25%, AL=1100nH/N2±25% UNGAPPED
2
Bobbin: EE16 vertical, 4+6PIN 1SECT T-H
3
Wire:Φ0.15mm,, 2UEW, Class B
4
Wire:Φ0.1mm,, 2UEW, Class B
5
Triple Insulation Wire: Φ0.30mm TIW
6
Triple Insulation Wire: Φ0.16mm TIW
7
Tape: 8.5mm(W)×0.06mm(TH)
8
Tube:#26 BLACK; #26 CLEAR; #30 CLEAR; #23 CLEAR
9
Varnish: JOHN C. DOLPH CO, BC-346A or equivalent
10
Solder Bar: CHEN NAN: SN99.5/Cu0.5 or equivalent

EVHF900-P-00A –OFF LINE, SWITCHING REGULATOR
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.
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QUICK START GUIDE
1. Preset Power Supply to 85VAC VIN 420VAC.
2. Turn Power Supply off.
3. Connect the Line and Neutral terminals of the power supply output to L and N port.
4. Connect Load to:
a. Positive (+): VOUT
b. Negative (–): GND
5. Turn Power Supply on after making connections.