MPS EVHF900-P-00A Manual de usuario

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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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

Output1 Current

IOUT1

300

Output2 Voltage

VOUT2

Output2 Current

IOUT2

Output3 Voltage

VOUT3

Output3 Current

IOUT3

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

R18

CX1

R10

R12

C12

R15

C14

R20

LX1

R21R22

C10

R14

R19

C13

C11

R16

R11

FR1

R13

R17

CX2

D3 D4

D7 D8

VOUT3

GND3

VOUT1

GND1(L)

C15

CY1

VOUT2

GND2

1uF/25V

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

Manufacturer

Manufactuer_P/N

C1,

47μF

Ceramic Capacitor;25V

DIP

Jianghai

CD28L-25V47

C2,C5

1μF

Ceramic Capacitor;

25V;X7R

0603

Murata

GRM188R71E2105KA12

C4,

2.2nF

Ceramic Capacitor;

630V;X7R

0603

Murata

GRM31BR72J222KW01L

C6,C8

22μF

Electroytic Cacitor;400V

DIP

Rubycon

400PX22MEFC12.5X20

1nF

Ceramic Capacitor;

250V;X7R

0805

Murata

GRM21A7U2E102JW31D

470μF

Ceramic Capacitor;35V

DIP

Jianghai

CD263-35V470

C10,

C12

100nF

Ceramic Capacitor;50V

0603

Murata

GRM188R71H104KA93D

C11

22μF

Electrolytic Capacitor;50V

DIP

Jianghai

CD281L-50V22

C13

22nF

Ceramic Capacitor;50V

0603

Murata

GRM188R71H223KA01D

C14,

C15

1nF

Ceramic Capacitor;16V

0603

Jianghai

GRM188R71C102KA01

CX1,

CX2

0.22μF

X Capacitor;275V;10%

DIP

Carli

PX224K3IC59L270D9R

CY1

D1,D2

ES1D

Diode;200V;1A

SMA

Taiwan

Semiconductor

ES1D

D3,

D4,

D7,

1N4007

Diode;1000V;1A

DO41

Diodes

1N4007

S1ML

Diode;1000V;1A;

SMA

Diodes

S1ML

MBRS32

00T3G

Schottky Diode;200V;3A

SMB

Onsemi

MBRS3200T3G

BAV21W

Diode;200V;0.2A;

SOD123

Diodes

BAV21W

LX1

24mH

EE8, Common Choke

DIP

Emei(1)

FX0344

FR1

Fuse Resistor;5%;1/2W

DIP

CTC

FKN50SJT-52-10R

R1,

6.8k

Film Resistor;1%

0603

Yageo

RC0603FR-076K8L

R2,

R6,

R10,

R12

5.1M

Film Resistor;5%;1/4W

1206

Yageo

RI1206L515JT

R3,

R8,

R11

2.2M

Film Resistor;5%;1/4W

1206

Royalohm

1206J0225T5E

150k

Film Resistor;5%;1/4W

1206

Yageo

RC1206FR-07150KL

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

Manufacturer

Manufactuer_P/N

R13

Film Resistor;1%

0603

Yageo

RC0603FR-071KL

R14

44.2k

Film Resistor;1%

0603

Yageo

RC0603FR-0744K2L

R15

215k

Film Resistor;1%

0603

Yageo

RC0603FR-07215KL

R16

2.49

Film Resistor;1%

0805

Yageo

RC0805FR-072R49L

R17

Film Resistor;1%

0603

Yageo

RC0603FR-072KL

R18

10k

Film Resistor;1%

0603

Yageo

RC0603FR-0710KL

R19

20k

Film Resistor;1%

0603

Yageo

RC0603FR-0720KL

R20

93.1k

Film Resistor;1%

0603

Yageo

RC0603FR-0793K1L

R21

3.3

Film Resistor;1%;1/4W

1206

Yageo

RC1206FR-073R3L

R22

5.1

Film Resistor;1%;1/4W

1206

Yageo

RC1206FR-075R1L

EE16

EE16, 2.5mH,

N1:N2:N3:N4:N5:N6=

22:170:30:16:16:26

DIP

Emei(1)

FX0418

HF900

Flyback regulator with

900V integrated MOS

PDIP8-

7EP

MPS

HF900GPR

EL817B

Photocoupler;1-Channel

DIP

Everlight

EL817B

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

BN5

Primary Secondary

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

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

1→NC

0.15mm * 2

2→1

0.15mm * 1

170

4→3

0.1mm * 1

5→6

0.30mm * 1 TIW

10→9

0.16mm * 1 TIW

A→B

0.16mm* 1 TIW

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

Core: EE16, UI=2300±25%, AL=1100nH/N2±25% UNGAPPED

Bobbin: EE16 vertical, 4+6PIN 1SECT T-H

Wire:Φ0.15mm,, 2UEW, Class B

Wire:Φ0.1mm,, 2UEW, Class B

Triple Insulation Wire: Φ0.30mm TIW

Triple Insulation Wire: Φ0.16mm TIW

Tape: 8.5mm(W)×0.06mm(TH)

Tube:#26 BLACK; #26 CLEAR; #30 CLEAR; #23 CLEAR

Varnish: JOHN C. DOLPH CO, BC-346A or equivalent

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.

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