and8407jp - ncp1631で駆動するインタリーブ型pfcステー …semiconductor components...

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Semiconductor Components Industries, LLC, 2013 March, 2013 Rev. 2 1 Publication Order Number: AND8407JP/D AND8407/D NCP1631で駆動するインタリー ブ型PFCステージ設計時の主要な 手順 インタリーブPFCしく登場したソリューシ ョンでありスリムノートブックPC アダプタや LCD TVなどなフォーム・ファクタをたすのあるアプリケーションで採用例がえてい ますインタリーブ設計易度くなる可 能性のある大型のステージを1個使する代わりに並列にした2個の「小規模」なステージで構成 されていますには2個の150 W PFCステージを み合わせてこの例の300 W PFCプレレギュレータ 形成しますこのアプローチには容易実装えるとはいえ品の小型善などいくつかの利がありますまたインタリーブ臨界導モード(CrM)範囲拡大する率的技法(t rr さいダイオードが不 ) です さらに NCP1631EVB/D[3] 告されているように波数 クランプ臨界条件モード(Frequency Clamped Critical conduction ModeFCCrM) み合わせる合は技法い効レベル(300 Wのアプリケー ションで90 V rms 荷範囲にわたって95%) 実現しますさらに2個のステージがで動作している合は、電リップルは大幅減少します入力 続導モード(CCM)に似た波形バル ク・コンデンサ内のrms大幅減少しますれらの特性アプリケーション・ノート AND8355 [1]されていますこのペーパーではNCP1631動するインタリー PFCステージを設計するときに役立つ主介しますこのプロセスを300 W汎用アプリケーションで図示します 最大出力300 W 入力圧範囲90 V rms ~ 265 V rms 安定化出力390 V 素子する計算2つの分全に分割されるという前づいています2つのコイルのインピーダンスがしくマッチング されている合はこの効です[2]EMI Filter Vin LOAD Vout Cin Vcc pfcOK Vout 1 Figure 1. Generic Application Schematic The “pfcOK” signal enables the downstream converter when the PFC is ready R bo1 R bo2 I in D 2 M 2 M 1 D 1 R ovp1 OVP in R ovp2 C bo2 R f b1 R f b2 V aux2 R zcd2 R zcd1 OVP in 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 R ocp R sense L 1 R t C osc R FF C z R z C p L 2 I coil2 I coil1 V aux2 AC Line C bulk + http://onsemi.com APPLICATION NOTE

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Page 1: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

Semiconductor Components Industries, LLC, 2013

March, 2013 − Rev. 21 Publication Order Number:

AND8407JP/D

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�������PFC������� ������������������PC�����LCD TV������ !��" #��$��%�&�'���(�����)��*+ ,-./%������������&���+��'0��&�'��&�1�2$134�%'56�)�78)���23&9���:��1�2���;<-./%���)��23&150 W PFC�1�2$�=>6?-�@&*&300 W PFC�AAB A��$��/%�@&��C�D)�������� + ,'E�.,�F&��G�!H"&#I���.JK&L$+��/%�/����������%&'M�N(CrM)&O()$*�%'�P+,���P-&�../(trr&�;.��Q�N+R )�% �;S) �NCP1631EVB/D[3]�0T;<-.'UV)�W1 �X��%&2YM�N(Frequency Clamped Criticalconduction Mode�FCCrM)E�=>6?'�>��@&./��3)�.P+AZ[(300 W&���(�

�����90 Vrms&4. 5())6�\-695%)$�7/%�;S)�23&�1�2+�]8�^_-.'�>��9���[��:);</%�)�`O9+�='M�N(CCM))a�1�$>�b[�"c�d�ef&rms9��:);</%�@<S&�&�?�����(����"���AND8355 [1])@�;<-./%�@&g�h����NCP1631��^%'�������PFC�1�2$��%'Ei)ABJj�C$Dk/%�@&�Cl�$�E&300 WF�jG���(�����H>/%�

I�mOO� 300 W

`OJ()� 90 Vrms ~ 265 Vrms

KLGmOJ� 390 V

OMN)�%'�O��2J&HP&��9+Qn)Ho;<'E.VpR)Sq.-./%�2J&c�[&��r����+Ts�D�t;<-.'�>��@&�U�VP�%[2]�

EMIF ilte r

Vin

LOAD

Vout

Cin

Vcc

pfcOK

Vout

1

Figure 1. Generic Application Schematic

The “pfcOK” signal enables the downstreamconverter when the PFC is ready

Rbo1

Rbo2

Iin

D2

M2

M1

D1Rovp1

OVPin

Rovp2

Cbo2

Rfb1

Rfb2

Vaux2

Rzcd2Rzcd1

OVPin

2

3

4

5

6

7

8 9

10

11

12

13

14

15

16

RocpRsense

L1

Rt

Cosc

RFF

Cz

Rz

Cp

L2

Icoil2

Icoil1

Vaux2

AC Line

Cbulk+

http://onsemi.com

APPLICATION NOTE

Page 2: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

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567��/89:;<=KLG[���&��:+�.E.V�+�S<'�>� 5/��X��&��&�^(*,���^n))U\-�PFC�1�2��i�Q�b� ��E���� ��$>/%�NCP1631��mOJ()$�:)��/��/��@&c��C�X����&�J�uAZ[$�L%'�,���1�&r�$o��-�mOJ+@&�A���[N$�e\-.'��O&��$�u/%�/��NCP1631&������a�����e��mOJ+t/.AZ[$4.5%ye\-.'�>��KLG[��$�:)�#G/%����PFC�1

�2)��J()+�3)�.y9c�b��+��/%�

“pfcOK”>?@e���PFC�1�2+KL��)�'K�VK$�m��)RKL��)�'�>���^nK��w2YyK$�m/%�p�&�>��“pfcOK”r�(r�15)+����)���z<{[&�>�C�)��/%�@&��)U��y9c�b���hP)��/%����b[�"c�d�e+�;<��w+�m;<-.�.�>$$i/%�I�)�PFC�1�2+T3^_-.'@E$pRE-��.J()$�7%'��)�y9c�b��$I ��%'@E��i/%�

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I�9|&�

>�`O9$3n�����l��;<�9|&$','@E$�u%'E�n)��]8^_$y`/%�

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Page 3: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

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)*CD

PFC�1�2&|&$�L%'p)�NCP1631&Y\]&W1 $L�%'@E+�)&�*�%�*>����(�������u]8�6120 kHz&���D�tW1 �&�X��$+�/%�{y&M$� %'�>)�@&W1 ��l,)�¡��A�NQ )�'KS�%�

�.���D�tW1 )U���¢MN&e��$�;/%�)����D�tW1 +�.w�������c�&e��+�;�'@E+�S<-./%�@&p£�����D�tW1 $�i'�ª��L%'�+��/%�

�¤����D�tW1 $�%'@E)��2J&j�¥$+��/%�

1.���D�t"A��+��'E���%'��+�i��/%��,-�%«-&¦Z�,�W1 +��'E�;<�Y!+�i��/%�

2. EMI ¬[���t&����§����D�tW1 )a}-EMI¨©,+ ���-1AZ[).qi/%���H&G��150 kHz$/,'W1 ) �;<'CISPR22��$��%�+��/%�@&p£��SMPS&����ª&�>�FSW = 130 kHz$+�%'@E��S�W1 $150 kHz«�)y`�z&¬-��|&()[$�\-./%�ª&�>�;­�-1$2)%'�+��'E.Vp£��65 kHz�+�;<-./%�

Y\]W1 ��u]8��X��W1 &2­�%��+\-�Y�]W1 $6240 kHz)�L/%�S�,)��23&150 W FCCrM PFC�1�2$��%'@E)��/%�@&®���OMN&|&�L)�%'�?$0¯/?x�@<S&�O�°±KS¢²%'KS�%����j�+�S�EC)J.-�0¯/%�

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CrMEFCCrM(CrM^_+�.X��EI� 5��³;<'EqL)���1J&HPf�&(I�)r�������9Erms�����9��E&UV)��/%�

(eq. 1)

� 2� � 32590

� 5.1 A

�IL(pk)�

MAX�

2 2� � �(Pin,avg)max

2�

�Vin(rms)�

LL

�U�

(eq. 2)�IL(rms)�

MAX��IL(pk)

�MAX

6�� 5.1

6�� 2.1 A

@@��(Vin,rms)LL��I�&rmsX��J(Pin,avg)max�I�AZ[&`O´µO

Vout,nom��zmOJ(KLGAZ[)

*>����(�������(Vin,rms)LL = 90 VVout,nom = 390 V(Pin,avg)max = 325 W (92%&n®P+$qL/%+�@<��'U�&¯¶$�1x��·,�°�%)

p%&UV)�23&HP&W1 �X��$6120 kHz)�L/%��.X���I� 5&2Yy��%&'M�N+"��i'�ª&±H�i.�����+�����@@��2Y�U��2)��/%�@&|&)U��E&C+'K</%(@@��

fsw(max)�120 kHz&�X��W1 �%)�

(eq. 3)L �(Vin,rms)LL

2 � (Vout 2� � (Vin,rms)LL)

(Pin,avg)max � Vout,nom � fsw(max)

*>����(�������E&C+'K</%�

(eq. 4)L �902 � �390 ( 2� � 90)�325 � 390 � 120 � 103

� 139 �H

I�)�150 �H/6 Apk/2.5 Arms&c�[$+�/��

)*IJK

���2��Q�N��E&C�¸S<'r��9L�Ei�O)Sq.-+�%'�+��/%�

(eq. 5)

� 1.8 � Vf �32590

� 6.5 � Vf

Pbridge �4 2��

� Vf �(Pin,avg)max

(Vin(rms))LL

��Q�N���1 V&*¤²J(Vf = 1 V)E����2+66.5 W$i�%'@E$qL/%�HP³E)�r��J��A�(Vout(max)+s�2�)��U�3rms9(IM(rms)))Sq.-MOSFET$+�/%�

� 325

3� � 90� 1 8 � 2� � 90

3 � � � 390� � 1.8 A

IM(rms) �2

3��

�(Pin,avg)max

2�

(Vin(rms))LL� 1

8 � 2� � (Vin(rms))LL3 � � � Vout,nom

� �

(eq. 6)

600 V�0.4 �&FET(SPP11N60)$4�%'E�E&'��+¸S</%(��P-+´{��RDS(on)+80% �%'@E$qL)�

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(eq. 7)� 1.82 � 0.4 � 1.8 � 2.3 W

Pcond � IM(rms)2 � RDS(on) �

@&�O��HP+13&�>)VP�%�� %']8�23�'&��MOSFET&>�'���62­(4.6 W))��/%����D�t��&µ¹�º��%�@@���O/?x�»4¶E-��l,)'��E�}�i;&��$¼�-�i/%�NCP1631����D�tW1 $�X��%'@E��@&UV�Oi�&´{$|&/%(@&*���uHP�Y\]W1 &120 kHz$½-',/?x)�P+$;S)#I%'��)�Figure 2&e�H$4�-MOSFET&Q���$�#G�i/%�@@��Q1&��NPN�X�2��(TO92)�MOSFET&���Q ·��9$ :/%�

M1

Q1R1010 k�

R2 R1

1N4148

DRV

Figure 2. Q1 Speeds Up the MOSFET Turn Off

D2

X��J$¾9%'`O���2E�23&HP&MOSFET���}¨�����$¸V/%��@&�O)Sq.-�>�i�O�E&()f)��/%�(6.5 + 4.6 + 4.6 �16 W) 2.9C/W&¨�����(437479)$��/%�@&¨�������(5v;<-.'`O���2EMOSFET&)(����&�§$�W)��)¿-650)|&/%��������PFC���23&§J��Q�N+��%(HP³E)13)��eÀ&¹6$Á�%'����/?x���Q�N�ºÂ) »�JL�(Vout(max)+s�2�)$����.*¤²J�y$"�-.'�+��/%�9+Qn)Ho;<'@E$qL%'E���Q�N&´µ9� 59&¼H)��/%�

� �ID(tot)(avg)

2�

ILOAD2

�Pout

2 � Vout�� �

ID(tot)(avg)

2�

ILOAD2

�Pout

2 � Vout�ID1(avg) � ID2(avg) �

ID(tot)(avg)

2�

ILOAD2

�Pout

2 � Vout� 0.39 A

�+\-�����UzE&UV)��/%�

�ILOAD � Vf

2�

@<���Q�N³E&°�%�J/��MUR550¾9]$4�%'��Q�N³E)500 mW«��%�u]8����Q�NKS��r��9��¿a%'�����&r��9E�}�i;�%�27&MUR550$+�/%�

LMFNO�P�Q���

�l,)�mOc�d�e�3J&{$� -��)��/%�

1.mOJ&V½�W1&I�Ã����[�`O9E`OO�¾¤E�TÄ1����PFC�1�2�� 5&O8E´µ&=+�Å%'¿�TÄ1O$��/%�z&¬-�mOJ�PFC_�)ÆV&�W1���[(J/��ÇÈ��100 Hz���[�ÉÊ��120 Hz���[)$>/%�

2.b[�"c�d�e)9`%'9&rms\:�@&�O)Sqi��!$Ëi�@;�.I�Ã�ESR$ÌL%'�+��/%�

3.À�[N���n��jG+Ín�&�)�\��>���G+I�O$��%'�&�'n�$ÎL%'@E��i/%�@<$À�[N���n�EÁ�/%�À�[N���n���l,)�10 ms/��20 ms&()�%�

mOJ���[�ÂE&C�¥,S</%�

(eq. 8)�Vout(p−p) �Pout

2� � fline � Cbulk � Vout,nom

c�d�e&rms9��E&C�¥,S</%(~� 5$qL)�

(eq. 9)

IC(rms) �16 � 2� � Pout

2

9 � � � (Vin(rms))LL � Vout � �2� Pout

Vout,nom

�2�I�)�E&C�À�[N���n�$Ï/%�

(eq. 10)thold−up �Cbulk � (Vout

2 Vout(min)2)

2 � Pout

@@��Vout(min)��y9c�b��+ 5) »)O$��%'��)�E;<'I�b[�J� %�

@@��À�[N���n�$� )`<�.&���@&Ä&2Y$��%��)100 �F&c�d�e$13+�/��r��"Å�"r��"���[�25 V (Vout&3%)�rms9�1.4 A�%�

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RSTUVW�!

NCP1631��O+&�G$Ëi�@;�)�PFC�1�2&I�W1 $�X��/%�@&_�)U��� 5n)���D�tW1 +�¦AZ[)"%'@E$�u/%�NCP1631d�������?$@��UV)�u]8&�X��W1 �����Y\]&W1 &¼H�%�

�+\-�

fsw(max)1 � fsw(max)2 � fsw(max) �fOSC

2(eq. 11)

@@��fsw(max)1���������PFC&IÆ&HP&W1 �X���fsw(max)2�2Ð�&HP)¿a/%fsw(max)1�U�fsw(max)2�Ñ�fsw(max)�2J&]8&.�<K&�X��W1 $Ï/%

fOSC�Y\]W1 �%

W1 !�[Nb��(�l,)�. 5&�Ò)+¢²�.�>�Y\]��zW1 fOSC(nom)

�\:$"��uHP�E&C�¥,S<'�z�X��W1 (fsw(max))nom�^_/%�

(fsw(max))nom �fOSC(nom)

2� 26 � 10−6

Cpin4

(eq. 12)

*,��220 pF&c�d�e 5KS��E&�X��W1 +'K</%�

(fsw(max))nom � 26 � 10−6

220 � 10−9� 118 kHz (eq. 13)

UVWXY�MZL[F

NCP1631��! 5n&P+$#I%'��)�W1 !�[Nb��_�$��-./%���)��Figure 3)>%UV)� 5+�LAZ[{y)�y��>��Y\]&�¨9��L���O)Ó*/%�

0102030405060708090

100110120130140150

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Figure 3. Frequency Fold-back

fOSC(nom) = 118 kHz

Vregul (V)

f OS

C (

kHz)

��������� ��������������

NCP1631r��8&r�6����%'O)Ó*%'VREGUL��$mO/%�r�6EtX�N&�)��%'~�(RFF)��E&UV)r�6&9(IFF)$-¾/%�

IFF �VREGUL

RFF

If �VREGUL

RFF

105 �A�IFF � 105 �A otherwise

����X��W1 �VREGUL)ÇÈ- �%'� ����(IOSC = 105�A)&Ei)I�°)"%'/��@& �+=i/%�

fOSC � fOSC(nom) If �VREGUL � RFF � 105 �A�

fOSC �VREGUL

RFF � 105 �� fOSC(nom) If �VREGUL RFF � 105 �A�

VREGUL�0~1.66 V&���^/%���0��O�VREGUL)Ó*%'&��W1 !�[Nb��)�%'O�A���[N��E&UV)��/%�

(Pin)FF �RFF � 105 �A

1.66 V� (Pin)HL �

(eq. 14)

�RFF

15 810� (Pin)HL

@@��(Pin)FF��@&°$ye\-.'�>�W1 +�y%'`OO

(Pin)HL��PFC�1�2+���i'É��I�AZ[&O�%�@&°������t~�&+�KS¸S<�¬-���(9I�O&-¾:l����$ÊÔ)��l,)��'U�&¯¶$�1

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x����(����&I�OU�ËÌÍÎÏÐÍ�i.°)�L/%�

*>����(�������4.7 k�&~�$r�6)��/%(RFF = 4.7 k�)��+\-�`OO+E&(Pin)FF�A���[N$ye\�Ei)W1 !�[Nb��+YZ/%�

(Pin)FF � 4.7 � 103

15 810� (Pin)HL � 30% � (Pin)HL (eq. 15)

*>����(�������I�`OO�325 W�%���E%'I�O$<�E�25%�e'O$���i'UV)�PFC�1�2$��%'@E+ÌÕ;</%���)��((Pin)HL � 494 W)$+ � / � � � +\ - �` O O+(30% (Pin)HL)�J/�6147 W$ye\�Ei)W1 !�[Nb��+YZ/%�

��������NCP1631��W1 $É��0)/�ËiyÑ/��d�����)�?$@��Figure 4&Ö×G�Y\]�C���>%UV)�e��IFF9$�;%'@E)U��W1 $�/%�@&9+0).q.�n$���Y\]&c�d�e$�%'��&35 �A&9G�Ëi=i4��i/%+�¨9�0).��3)9.¨n�$��3)�.W1 )�'@E+'K</%�0Ø���&¹6$�u%'��)�W1 +

16 kHz{y)�y%'@E$:ª-�;.�ÖÙ��Ú��“OSC”r�EtX�N&�)~�(RFmin)$���I�&Y\]¨9$Û|%'@E�%(Figure 4$ÊÔ)�

Figure 4. Adjustment of the Minimum Frequency

IFF

IFFCOSCRFmin

OSC

(Pin 4)

35 �A

DRV1

DRV2

CLK2

CLK1

OscillatorControlBlock

f�9IFF+0��'@E$qL%'E�35 �A&�9�RFmin)U\-Z�;<'Ü=,����9��U�COSC&¾Ý�&1 V&\:(Y\]+���D�tW1 $�X��-.'�&\:)$� -Y\Þ�$�O�i/%�@&�O$�d%'E�RFmin)U\-Û|;<'I��X��W1 (HP³E)$E&UV)'m�i/%�

(eq. 16)

� 1

2 � RFmin � COSC � �0.22 � In �RFmin114000

RFmin143000��

�fsw(max)�

min�

fOSC(min)

2�

*>����(�������(RFmin = 270 k�)�620 kHz&I�W1 $Û|/%�

Ò��r�6$tX�N)|��=%'E�W1 !�[Nb��+ßu;</%�r�6$(ÓY,K�VK)KK6��)tX�N)�=��>��n 5())6�\-e���z�X��W1 �^_/%�

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�7\�]\^_`

X��"�X¢��¢�ÝN(r�7)�����PFC`OJ(VIN)&��$ÔªÕ�/%�PFC&^_~�VIN�¾9;<�TÄ1�&��c�d�e�ACX�

�"���[$´àG�(VIN)&´µ°&��+�X¢��¢�"r�)Ö�;<'UV)%'�+��/%�

Figure 5. Brown-out Block

AC

Lin

e

EM

IF

ilter

Vin

BORt

Rt

Rcs

Cin

Rbo

1

Rbo

2C

bo

I BO

I BO

Vbo

Vbo

Cur

rent

Mirr

or

Vbo

(B

O P

in V

olta

ge)

Fee

d-fo

rwar

dC

ircui

try

IBO

Cha

rges

the

Tim

ing

Cap

acito

r fo

r B

oth

Pha

ses

BO

_NO

K

Tde

lay

Circ

uitr

y fo

rB

row

n-ou

t Det

ectio

n

100-

ms

Del

ay10

0-m

sD

elay

Res

etR

eset

Res

et

L BO

S R

Q

OP

AM

P1

V

Vdd

7 �A

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Figure 5)>%UV)��X¢��¢�"�C��)�2J&_�+��/%�

1. ¬�N !¡�N��X¢��¢�"r�&J�b� #;<�f�9IBO$Z�/%�@&9��`OJ&´µ°)Ó*�r�3&~�(Rt)E�=>6;</%�@&9�2×;<�23&HP&Q�n�$|^%'f�&����t"c�d�e$�%'9$��/%����Q�n���X��&�i;&2×)ØÓ*/%� ¬�N !¡�N_�)U��Ù"� �U�O���ACX��"AZ[KSsB-./%�

2.X��\:&�m+�3)�;��/%��X¢��¢���+�m;<��>�@&_��á;<'UV)�¨�1���&�,��7 �A&9G+BOr�&J$�/%�°±�&���(���������;<'J�PFC�1�2&��)a}-�ir��/%�ÚB^_p�PFC�1�2�Q ��`O���2�r���m]E-^_/%(Figure 6$ÊÔ)�z&¬-�`OJ���

�Û´â����ACX��&\:)wÜÑ��/%�

VIN � 2� � Vin,rms

@@���Vin,rms�X��&rmsJ�%��+\-�r�7)�;<'J�E&UV)��/%�

Vpin7 � 2� � Vin,rms �Rbo2

Rbo1 � Rbo2

ÚPFC�1�2&^_+(ã;<���`OJ�¾9;<�TÄ1)���r�7)Ö�;<'J�E&UV)��/%�

Vpin7 �2 � 2� � Vin,rms

�Rbo2

Rbo1 � Rbo2

J/��p&°&664%�%�

�+\-�°±�&���(�������PFC+^_-.'�>���}X��\:KS�36%�.BOr�J$'@E)��/��@&p£���i.¨�1���+��%�

Figure 6. Typical Input Voltage of a PFC Stage

Start of PFC Operation

2� � Vin,rms

Vin(t)2� � Vin,rms � sin(�t)

0

200

400

Figure 5�CboaRbo1abcdRbo2��e

Ý.Þe�+�X¢��¢�$�m�eÀ^_$�d%'@E)�'X��"AZ[$L�/%ß*>����(�������90 Vrms�^_%'UV)�L/��@&°��E&�A���[N$+�%'Ei)ABJ0��+��/%�

X��J+(Vin,rms)boH = 81 V (90 V&90%)$�e\�Ei)���1��^_$(ã/%�

X��J+(Vin,rms)boL = 72 V (90 V&80%)$ye\�Ei)��1���w$�m/%�

2.�Vpin7(BOr�&J)+àá&�A���[NEâä%'Ei(Vpin7&B½�+�EB½y+�)&´µ`OJ$L�/%ßX��J+BO�A���[N{y&�>�f�9G(IHYST = 7 �A���)+�^;<-�'U�&¨�1���+YZ�E&�>)e�+eÀ$�d/%�

Rbo2Rbo1 � Rbo2

� �Vin,avg�

boH�Rbo1 � Rbo2

Rbo1 � Rbo2� IHYST� � Vbo(th)

(eq. 17)

@@��(Vin,avg)boH�´µ`OJ����@&°$�e'Ee�+Q�)��/%�Vbo(th)�BO&f��A���[N�%(����1 V)�

�+\-�

�Vin,avg�

boH� �Rbo1 � Rbo2

Rbo2� Vbo(th)�� �Rbo1 � IHYST

�(eq. 18)

X��J+BO�A���[N$�e\-.'�>�f�9G(IHYST = 7 �A���)�Q ����BOr�&J�E&UV)��/%�

Vpin7 � kBO � Vin,avg � �1 fBO

3 � fline� (eq. 19)

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@@��(Vin,avg)�´µ`OJfline�X��W1

fBO��m ��¡��&åW1

�fBO �Rbo1 � Rbo2

2� � Rbo1 � Rbo2 � Cbo�

kBO�BO�m ��¡��&;<+

�kBO �Rbo2

Rbo1 � Rbo2�

;

�1 fBO

3 � fline�

�Equation 19&~)���BOr�&J���[(æ1�-1.a)$�O)��'@E+�i/%�

BOr�&J+Vbo(th)(BO&f��A���[N������1 V){y)�\��>��X¢��¢��w+�m;</%��+\-�´µJ+�E&C�Ï7;<'(Vin,avg)boLAZ[{y&�>�BO��+��ã;</%�

�Vin,avg�

boL�

VBO(th)

kBO � �1 fBO

3�fline� (eq. 20)

@@��(Vin,avg)boL�´µ`OJ����@&°{y)�'Ee�+Q )��/%�fBO��m ��¡��&åW1 �%�

�fBO �Rbo1 � Rbo2

2� � Rbo1 � Rbo2 � Cbo�

/��fline�X��W1 �%�

3. �OßEquation 20KS��X¢��¢�;<+)�%'E&C$'m�i/%�

KBO �Rbo2

Rbo1 � Rbo2�

VBO(th)

(Vin,avg)boL � �1 fBO

3�fline� (eq. 21)

äåæçèéêëÞËÝ$äåæçèéêëÞÝì)5`%'E�E&C+'K</%�

(Vin,avg)boH � �(Vin,avg)boL � �1 fBO

3 � fline��� (Rbo1 � IHYST)

(eq. 22)

z&��Rbo1)�%'E&C$'m�i/%�

Rbo1 �

(Vin,avg)boH �(Vin,avg)boL � �1 fBO

3�fline��

IHYST(eq. 23)

Rbo1)�%'�@&C$©4�%'E�Rbo2$Equation 21KS'm�i/%�

Rbo2 �Rbo1

�(Vin,avg)boL

VBO(th)� �1

fBO3�fline�� 1

(eq. 24)

»4¶E-E&C$qL/%�

�fBO �fline10�

J/��60 HzX��&�>�6 Hz)���E&C+¸S</%�

Rbo1 �

(Vin,avg)boH � �

(Vin,avg)boL �� �

1

fline10

3�fline������

IHYST�

(Vin,avg)boH �0.967 � (Vin,avg)boL�

IHYST(eq. 25)

Rbo2 �Rbo1

�(Vin,avg)boL

VBO(th)� �1

fBO3�fline�� 1

�Rbo1

�0.967 �(Vin,avg)boL

VBO(th)� 1

(eq. 26)

1J&*E-�°±�&PFC�1�2$� /%�@&�1�2���e�&^_n)�`OJ&´µ°+36%�y/%(Figure 6)H>�E��)��+\-�E&°$+�/%�

X��J+E&°$�e\�Ei)���1��^_$(ã/%�

(Vin,rms)boH � 81 V

X��J+E&°{y)�\�Ei)���1���w$�m/%�

(Vin,rms)boL � 72 V

¿a%'´µ`OJ�A���[N��E&C�¥,S</%�

(Vin,avg)boH � 2� � (Vin,rms)boH � 2� � 81 (eq. 27)

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�U�

(Vin,avg)boL � 2 2�� � (Vin,rms)boL � 2 2�

� � 72 (eq. 28)

@@��E&C$ç�+��/%�

Rbo1 �

� 2� � 81� �0.967 � 2 2�� � 72�

7 � 10−6 � 7410 k�

(eq. 29)

Rbo2 � 7410 � 103

� �

0.967�2 2�� �72

1 ��� 1

� 120 k�

(eq. 30)

Cbo �Rbo1 � Rbo2

2� � Rbo1 � Rbo2 �fline10

(eq. 31)�

7410 k � 120 k

2� � 7410 k � 120 k � 6010

� 225 nF

��)��43&1.8 M�~�$Rbo1E-|8)��(7.2 M�&>�~�)�120 k�&~�$Rbo2E-�220 nF&c�d�e$CboE-4�/%�

NCP1631&�X¢��¢�e�)��À�[N���n�íè$��%��&50 ms�X���t<é+fk;<-./%(d�����$ÊÔ)�

-f)*�gh

ênX��9��PFC�1�2&23&HP)U\-îï;<�>�9&(���D�tW1 n®)6�\-)´µG;<�°�%�@&°�E&C�¥,S</%�

Iin(t) �Vin(t)

L�

(Rt)2 � VREGUL

26.9 � 1012 � kBO2 � Vin,rms

2(eq. 32)

@@��

� (Rt)2 � VREGUL

26.9 � 1012 � kBO2 � Vin,rms

2��uHP&Q�n�$Ï%C�%�

(VREGUL)��f�������KLG�C��(VCONTROL)&mO)|},)ð¢/%�(VREGUL)��0~1.66 V&()��^/%�

Iin(t)�U�Vin(t)��ênX��9�U�ênX��J�%�

Vin,rms �X��&rmsJ

L�c�[&�������

kBO�BO�m ��¡��&;<+

�kBO �Rbo2

Rbo1 � Rbo2�

IinEVin$Kª'E�ênO$'m�i/%�

Pin(t) �(Rt)2 � VREGUL � Vin

2(t)

26.9 � 1012 � L � kBO2 � Vin,rms

2(eq. 33)

/��X��Þ�n®)6�\-ênO$´µG%'E�´µVOO)�%'E&C+¥,S</%�

Pin,avg �(Rt)2 � VREGUL

26.9 � 1012 � L � kBO2

(eq. 34)

¬�N !¡�N&¬-E-���;<'O�X��\:)ð¢?��(�X¢��¢��m&�,�4��U�|&�L;<')`OJ�m ��¡��&c�[&�������E�~�Rt&=&� )��/%�@&~���r�3)�=;<'����t~��%�

VREGUL�1.66 V)�X��;<'&��PFC�1�2KSÉ�����i'I�O((Pin)HL)��E&C�¥,S</%�

(Pin)HL �(Rt)2 � 1.66

26.9 � 1012 � L � kBO2 �

(Rt)2

16.2 � 1012 � L � kBO2

(eq. 35)

�+\-�

Rt � 4025 � 103 � kBO � L � (Pin)HL� (eq. 36)

�`n&¯¶$�/-�((Pin)HL)E-�µÞ;<'I�`OO$�Uz25%�e'°$+�%'�+��/%�J/��*>����(������(125% 325 W � 400 W))��/%�*>����(�������

L = 150 �H

Rbo1 = 7,200 k�� Rbo2 = 120 k��&��

�kBO �Rbo2

Rbo1 � Rbo2� 1

61�

�+\-�

Rt � 4025 � 103 � 161

� 150 � 10−6 � 400� � 16 � 2 k�

(eq. 37)

18 k�&~�$+��z&¬-�E&C+'K</%�

(Pin)HL �(18 � 103)2 � 612

16.2 � 1012 � 150 � 10−6 � 496 W

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Xi�ZL[Fj[^k�F

NCP1631��X��c������"�X�"���$�=1x�������200 �S&�X��c������"·��E20 �A&I��O$"�/%(Figure 7�ÊÔ)�PFC�1�2&mOJ��~�Ho)U\-[��HJ;<� ¬�Nb��`O(r�2)�Mñ�;</%�b���9�I�G;<(500 nA«�)���"��r����" ¬�Nb��" ��¡��$4��i/%�[��[��ëò$�d�i'UV)��X�"���&mO�r�KSmO;</%(r�5)�

Xi�ZL[F/ !/lmCD��eRfb1�U�Rfb2���;<'Figure 7&~�Ho��

PFCmOJ+�z°)Ñ.Ei)�Vpin2+f�� #A��J(VREF = 2.5 V))Ñ�'UV)�PFCmOJ)Ó*%'J$r�2)��%'�+��/%� m.ì,'E�

Rfb2

Rfb1 � Rfb2� Vout,nom � VREF (eq. 38)

/��

Rfb1

Rfb2�

Vout,nom

VREF 1 (eq. 39)

¬�Nb��~�)�%'�V1J&|&��~�+i�%'O�%�PFCmO&�J(���390 V&()))U'b���$Ö�;<'Rfb1ERfb2��~�°+�;.�>����) ímW$i�%'0��+��/%��l,)�b���9$100 �A&())�L%'@E$��)%'E���E���î�&���¡��A�NQ $"��i/%�@&2YKS�E&C+'K</%�

Rfb2 �VREF

100 �A� 25 k� (eq. 40)

���*>����(�������(Rf b2 =27 k�)$+�/��Equation 39)°\-�Rfb1�E&C�¥,S</%�

Rfb1 � Rfb2 � �Vout,nom

VREF 1� (eq. 41)

�+\-�390 V&KLGAZ[$��·��)/%�

Rfb1 � 27 k� � �3902.5

1� � 4185 k� (eq. 42)

`OJ�m ��¡��&�>E�è�º�&Rfb1~�&56�)�ï &~�$|8)��%'�+��/%�*>����(�������(1,800 k� + 1,800 k� + 560 k�)& ��¡��$+�/%� @&+�$�(Rfb2 = 27 k�)E�=>6?'E�E&C+¸S</%�

Vout,nom �Rfb1 � Rfb2

Rfb2� VREF (eq. 43)

�1800 k � 1800 k � 560 k � 27 k

27 k� 2.5 V

� 388 V

<=

NCP1631��X¢��¢�`OJ$4�-��'U�& ¬�N !¡�N$��/%�@&¬-�PFC�1�2&���&Ù"� $ACX��\:KSsB;?'@E+�i/%�U�ó®,)��b[�"c�d�e&ESR$ho�i/%�

(eq. 44)

V^

out

V^

REGUL

�(Rt)

2 � Rout53.8 � 1012 � L � kBO

2 � Vout,nom�

� 1

1 ��s �Rout�Cbulk

2�

@@��Cbulk�b[�"c�d�e�%�

Rout� 5&Ñô~��%�

Rt�r�3&[vª~��%�L�PFCc�[&��������%�KBO��X¢��¢�&;<+�%�

Vout,nom�PFCmO&KLGAZ[�%�

����.O+Ó$�7%'��)�����1�2��3)�.|^��:�J/�20 Hz{y&()$>%�+��/%��+\-� 5)õ=��^+YZ}��>���l,)��¦�Q�b� ������� ��+Z}/%� NCP1631��J��(OVP))U��Q�b� ��$|&/%(9�J��:l����$ÊÔ)����� ��$ð|%'��)�f�c�hA��� ¬�Nb��(Vpin2)$�o�Vpin2+�z°&95.5%$ye\��>�220 �A&9G$�=�ëòc�d�e&�$�#G/%�I�)�c�hA��E�X�"���&W$á�'�>��Uz10/�&°)�'&+ñ�%(Note 1)�@&������a�����e$����KJ�L0���J��_�E�=>6?'E�X��/ 5&õ=��x7>�����S�'2Yy�mOJ&*"$Rm�i'@E+�ò;</%��+\-�wEx�&���(�������.W1 &å$��%'@E����:$�:)|&�i/%����E&H�>%UV)�type2&ëò$��%'@E+ÌÕ;</%�

1. The circuit disables this capability (dynamic response enhancer) until the PFC stage output voltage has reached its target level (that is whenthe “pfcOK” signal of the block diagram, is high). This is because, at the beginning of operation, the pin5 compensation network must chargeslowly and gradually for a soft start-up.

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Figure 7. Regulation Trans-conductance Error Amplifier, Feed-back and Compensation Network

��

VREGUL2R

R

FB GEA = 200 �S

OTA+

VREF2.5 V

Vout

Rfb1

Rfb2(Pin2)

Vcontrol

(Pin5)Cp

Cz

Rz

Type-2&ëò])U\-�7;<'Ù"� $|^%'��&mO��E&UV)��/%�

V^

control

V^

out

�1 � sRzCz

sRo(Cz � Cp)�1 � sRzCz�Cp

Cz�Cp� (eq. 45)

@@�Â

R0 �Vout,nom

Vref � GEA

GEA��X��c������"�X�"���&·��(OTA)�Vout,nom��zmOJ(VoutKLGAZ[)�VREF�OTA&2.5 VJ� #A���%�

���NCP1631&PWMl�����Vcontrol$|�4�%'@E���VREGUL$4�/%�VcontrolEVREGUL$�¬%'~�Ho(5/9)$4�%'E�E&C+'K</%�

V^

REGUL

V^

out

�1 � sRzCz

s9�Ro

5� (Cz � Cp)�1 � sRz

Cz�Cp

Cz�Cp�

(eq. 46)

�+\-�E&C+¸S</%�

V^

REGUL

V^

out

�1 � s

2��fz

s2��fp0

�1 � s2��fp1

�(eq. 47)

@@��

fz��ëò]&W1 0�%�

fz �1

2� � Rz � Cz

fp1��ëò]&�.W1 å&W1 �%�

fp1 � 1

2� � Rz � � Cp�Cz

Cp�Cz�

fp0��´$&å&W1 �%�

fp0 � 518� � R0 � �Cp � Cz�

R0 �Vout,nom

Vref � GEA

ÐE�.W1 å&��ß60&]8����$"�%'@E+�i��+\-�60&]8s�2�$¸'��)�ëò]&0$(fc/4))����.W1 å$(4 fc))��%'@E+�i/%�@@��fc��+���C�Q�bW1 �%�@&CKS�E&C+'K</%�

fp1 � 42 � fz (eq. 48)

fp1Efz$Equation 48)5`%'E�E&C+'K</%�

Cp � Cz

Cp � Cz�

Cz16

(eq. 49)

�+\-�

Cz � 15 � Cp (eq. 50)

»���:$"�%'��&´$ö&å&���Equation 44��PFC����&?,�´$$E&UV)�L/%�

Go �(Rt)2 � Rout

53.8 � 1012 � L � kBO2 � Vout,nom

(eq. 51)

fc+t/.�C�Q�bW1 ��'�>�§Jc�b��&å+�ëò]�+��0&]�)�L;<'UV)� 5÷�´$&å$��%'�+��/%�

�+\-�

−20 � log� fcfp0� � −20 � log�G | �Rout �

4� � Cbulk � fc

��(eq. 52)

/��

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fp0 �fc

G0 | Rout �4

��Cbulk�fc

(eq. 53)

@@KS�E&C+'K</%�

fp0 �

fc4�Rt

2

� � 53.8 � 1012 � L � Cbulk � kBO2 � fc � Vout,nom

(eq. 54)

@&C�E&UV)Ö×G�i/%�

fp0 �� � 53.8 � 1012 � L � Cbulk � kBO

2 � fc 2 � Vout,nom

4 � Rt2

(eq. 55)

@@��kBO�BO�m ��¡��&;<+

�kBO �Rbo2

Rbo1 � Rbo2�

fp0$�Equation 55)>�Ï7��iì,'E�E&C+'K</%�

518� � R0 � (Cp � Cz)

� 5

18� � � Vout,nom

Vref�GEA

� � (16 � Cp)

�� � 53.8 � 1012 � L � Cbulk � kBO

2 � fc2 � Vout,nom

4 � Rt2

(eq. 56)

GEAEVref$��°(z<ø<�200 �SE2.5 V)��iì,'E�Cp$¥,'E&C+'K</%�

Cp �Vref � GEA � Rt

2

7646.2 � 1012 � L � Cbulk � kBO2 � fc 2 � (Vout,nom)2

(eq. 57)

Rt$Equation 36)>�Ï7��iì,'E�p%&C+E&UV)Ö×G;</%�

Cp �1.06 � 10−6 � (Pin)HL

Cbulk � fc 2 � (Vout,nom)2(eq. 58)

Rz��e

ëò]&0$(fc/4))��%'E�E&C+'K</%�

fz �1

2� � Rz � Cz�

fc4

(eq. 59)

I�)��@&CKS�ëò ��¡��$��%'��&E&C$'m�i/%�

Cp �1.06 � 10−6 � (Pin)HL

Cbulk � fc 2 � (Vout,nom)2(eq. 60)

Cz � 15 � Cp (eq. 61)

Rz �2

� � Cz � fc(eq. 62)

*>����(�������

Cp � 1.06 � 10−6 � 497100 � 10−6 � 202 � 3902 � 86 nF (eq. 63)

��)��@<)..��°��'�68 nF&c�d�e$4�/%�

Cz � 15 � Cp � 1020 nF (eq. 64)

��)��1 �F&��,�c�d�e$+�/%�

I�)�

Rz �2

� � 1 � 10−6 � 20� 31.8 k� (eq. 65)

33 k�&~�$��/%�

60&()&]8s�2�$¼��i'UV)�ëò$�O/%��.W1 å$�U��.W1 )�L%'@E��i/%���)��Cp$�ÌÕ°&4­/��i(RzECz&�½S��ó?�))�Vcontrolr�&���[$�;�THD$;S)#I%'@E��i/%��C�Q�bW1 ��G/?x�]8s�2�&�i;$5ò)%'@E��@&�ó$�d�i/%�]8s�2���I�30/���'@E+�i/%�U�ó®,)��E&UV)��/%�

�m � arc tan�fcfz� arctan� fc

fp1� (eq. 66)

@@��

fz��ëò]&W1 0�%�

fz �1

2� � Rz � Cz

fp1��ëò]&�.W1 å&W1 �%�

fp1 � 1

2� � Rz � � Cp�Cz

Cp�Cz�

Cp,E-150 nF&c�d�e$+�%'E�E&C+'K</%�

(fz � 5 Hz), (fp1 � 37 Hz), (�m � 76o 28o � 48o)

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CURRENT SENSE NETWORK

The

CS

blo

ck p

erfo

rms

the

over

-cur

rent

pro

tect

ion

and

dete

cts

the

in-r

ush

curr

ents

.

OC

P

In−

rus

h

Cu

rre

nt

Mir

ror

Figure 8. Current Sense Block

CIN

VIN

I IN

EM

IF

ilter

I CS

I CS

RO

CP

RC

S

I IN

Neg

ativ

eC

lam

p

M1

DR

V1

M2

DR

V2

L 1

CB

ULK

VO

UT

D2

L 2

D1

Vau

x1

Vau

x2

I OC

P =

200

�A

I CS

I CS

I CS

I ZC

D =

20 �A

(IC

S is

Pro

port

iona

lto

the

Coi

l Cur

rent

)

(fro

m Z

CD

blo

ck)

Qzc

d1Q

zcd2

AC Line

CS

9

+

LOAD

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NCP1631��c�[&9)Ó*%' &J$Mñ�%'UV)��;<-./%���)��9l��~�(Figure 8&RCS)$ô@h�)õ`�23&HP)U\-îï;<�>�9)Ó*%' &J$Z�/%�e���CSr�&J$0)y`%'��)�E;<'9$��%'Qg���$fk-./%(Figure 8$ÊÔ)�~�ROCP$CSr�ERCS&�)õ`%'E�E&UV)r�9&9$-¾�i/%�

(RCS � Iin) � (ROCP � Ipin9) � Vpin9 � 0 (eq. 67)

@@KS�E&C+'K</%�

ICS � Ipin9 �RCS

ROCPIin (eq. 68)

@@��Iin���������PFC�1�2&2J&]8)î.1/<�>�9�%�

e���e��[³E)9$|&%'��)�ICS$fk&210 �A9� #A��EÓA/%��+\-�c�[&I�9�E&UV)��/%�

Iin,max �ROCPRCS

� 210 �A (eq. 69)

Iö,)�Ó+(ROCP/RCS)��E&C)°\-�9|&$�L/%�

ROCPRCS

�Iin,max

210 �A(eq. 70)

@&9|&$�L%'��)23&[vªMN(ROCPERCS)$4�-.'&����E���î�&II&�A�NQ $"�%'��)�9l��~�$I G%'@E+�i/%�

23&HP)î.1/<'I�9�[1])>�UV)��������PFC)î.1/<'>�9��E&C�¥,S</%�

Iin,max � 2 2� �(Pin,avg)max

(Vin,rms)LL�� �

1 Vout,nom

4 � �Vout,nom � 2� � (Vin,rms)LL�����

if (Vin,rms)LL Vout,nom

2 2�(eq. 71)

Iin,max � 2 2� �(Pin,avg)max

(Vin,rms)LL� �1

Vout,nom

4 � 2� � (Vin,rms)LL

� if (Vin,rms)LL �Vout,nom

2 2�(eq. 72)

@@��(Vin,rms)LL��ùúûX��J&I�AZ[�%�(Pin,avg)max�`O´µO&I�AZ[�%�Vout,nom�mOJ&�zAZ[(/��mOKLGJ)�%�

*>����(�������

�(Vin,rms)LL � 90 Vout,nom

2 2�� 390

2 2�� 138�

�+\-�

Iin,max � 2 2� �(Pin,avg)max

(Vin,rms)LL�� �

1 Vout,nom

4 � �Vout,nom � 2� � (Vin,rms)LL�����

(eq. 73)

Iin,max � 2 2� � 32590

�� �

1 390

4 � �390 � 2� � 90������ 6.4 A (eq. 74)

ROCPERCS&+��`O9���[$ho%'E�RCS)U'����E&Ö×G�C�¥,S</%�

PRcs � RCS � �Pin,avg

Vin,rms�2

(eq. 75)

X��+��I�O$��%'�>&PFC�1�2&P+)üÜ%8¿,�÷B&� E-�RCS$+�%'@E��i/%�$�RCS+i�%'0��&�'Ù×&8¿o>E%'�>�@&2YKSE&C+'K</%�

� � (Pin,avg)max � RCS � �(Pin,avg)max

(Vin,rms)min�2

(eq. 76)

I�)�

RCS �� �(Vin,rms)min

2

(Pin,avg)max(eq. 77)

�U�

ROCP � RCS �Iin,max

210 �A(eq. 78)

�l,)�(= 0.2%))�L%'E���E���î�&���¡��A�NQ $"��i/%(J/��X��+�.�>)O&0.2%+RCS��6</%)�

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@&2YKS�RCS&E&°+'K</%�

Rcs � 0.2% � 902

325� 50 m� (eq. 79)

@&+�KS�ROCP~�&E&°+'K</%�

ROCP � 50 m �6.4 A

210 �A� 1.5 k� (eq. 80)

no)pqr(ZCD)

u]8������"�����KS¸S<�ø})Sq.-�ýC9�m(ZCD)ù0+¥,S</%����D+Q�)�\�n$��ZCDr�&J�E&°)Ñ��/%�

Vzcd � VinN

(eq. 81)

@@��Vin�ênACX��J�N�ø Ó(�E÷ø} EZCDëþø} &Ó)�%�

���D+Q )�\�n$��ZCDr�&J�E&°)Ñ��/%�

Vzcd �Vout Vin

N(eq. 82)

NCP1631�23&ZCDc�hA��$fk-./%�

1.IÆ&c�hA����HP2KSZCDJ$ÔªÕ'r�1$�m/%�

2. 2Ð�&c�hA����HP1KSZCDJ$ÔªÕ'r�16$�o/%�

@<S&ZCDc�hA��)�0.5 V&�A���[N+��/%(B½�+�n�250 mV&¨�1���)��+\-��S�'^_2Y�iú$dV�)�ZCDr��<�E�0.5 V+Õ¸;<'UV)N$e���L%'�+��/%�ZCDr��Õ¸;<'J���.X����TÄ1&�Ý)"�Ei)I�°)�'@EKS�E&C+'K</%�

N Vout � 2� � (Vin,rms)HL

�0.5

((Vin,rms)HL = 265 V)��U�(Vout = 390 V)&�>��$30«�)%'�+��/%�*>������ø}ÓE-10$+�/��~�RZCD1$�]81&ZCDø}EHP1&r�16&���V1J&~�RZCD2$]82&ZCDø}EHP2&r�1&�)C�/%�RZCD1ERZCD2��r�1Er�16)¿%'9`/��9m9$|&/%�@&9��2 mA&())�L-�;.(���E���&¾¤E�)��l,)�@<S&r�)I�&��A�+�,S<'&���.X��KS���9+9`%'�>�%��+\-�RZCD1ERZCD2��E&C$��%±H��i;$+�%'�+��/%�

RZCD1 � RZCD2 �2� � (Vin,rms)HL

IZCD � N�

(eq. 83)

� 2� � 2652 m � 10

� 19 k�

22 k�$+�/��

���@&~�&°E�ZCDr�&�;.¦Z�,&°)U\-�ZCDø}&ù0+�m;<-E)h[�&�^$(ã%'����t+½/�/%�pq,)��ZCD~���I��y�D&n$��^$(ã/%�@&�>��NA��J+I�&n$�MOSFET+Q�)Àô%'@E)������D�t��+I�&)ð,S</%�@&��$"�%'RZCD1ERZCD2&°���4)U\-II&�&$�Jª/%�°+�i%£'E�ZCD�Z��$�m%'/�&<én�+9��/%�z&�>�c��C�X�R�='M�N(DCM)�^_O++÷B$Ôª/%��)�ZCD~�+�;%£'�>��J+�.V½)E&NX�b�"h[�+(ã;<����D�tP++÷B$Ôª/%�

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:)sAB

NCP1631��J��E�J��&�,���&r�$1�o��--./%�NCP1631&�����23&3ÿ& ¬�Nb��" ��¡��$���i/%(Figure 10$ÊÔ)�

13�r�4( ¬�Nb��`O)) �;<'KLG$�,E/%�

�V13�OVP_�$�,E/%�

Figure 9. Configuration withOne Feed-back Network forBoth OVP and Regulation

Figure 10. Configuration with TwoSeparate Feed-back Networks

Figure 11. Another Configurationwith Two Separate Feed-back

Networks

OVP

Rout2

Rout3

Rout1FB

Vout (Bulk Voltage)

2 153 144 135 126 117 108 9

1 16

Rovp2

Rovp1

Rfb1

Rfb2

OVP

FB

Vout (Bulk Voltage)

1514131211109

162

34567

8

1 Rovp

Rfb1

Rfb2

1514131211109

16Rfb1

Rfb2

OVP

FB 2

34567

8

1

Vout (Bulk Voltage)

¿� ¬�Nb������'U�&�9�$�7�Kn�AZ[$²�;?'&��23& ¬�Nb��û�&�½SK��w+YZ��>��PFC�1�2$���i/%����KLG_�EOVP_���}� #A��J(VREF = 2.5 V)$4�%'&��üt%'�>��Figure 9)>%UV)º�& ¬�Nb��û�$4�%'@E��i/%��}� #A��J$4�-.'KLG�C��EOVP�C�����Rout2ERout3&~�&Ó+�OVP�A���[N$-¾/%� U�ó®,)��E&UV)��/%�

b[�KLGJ��E&UV)��/%�

Vout,nom �Rout1 � Rout2 � Rout3

Rout2 � Rout3� VREF (eq. 84)

(b[�)OVPAZ[��E&UV)��/%�

Vout,ovp �Rout1 � Rout2 � Rout3

Rout2� VREF (eq. 85)

OVPAZ[EKLGAZ[&��E&UV)��/%�

Vout,ovp

Vout,nom� 1 �

Rout3Rout2

(eq. 86)

*,��(Rout3 = 5% Rout2)��(Vout,ovp = 105% Vout,nom)U�õd/%�mOJ+OVPAZ[$�e\-.'@E$e�+�m�|��/�OVPAZ[$�e\-.'���O���D�Q )���O&��$�u/%�*>����(�������23&3ÿ&Vout�m ��¡��$��%'Q����$+�/�(Figure 10&��)�KLG ��¡��E�è�

Mñ�~�&��r����$E&°)%'�+��/%�

1.wEx�&G����b�Y$��%�+��/%+�'�+YZ-z&Y)�ý�i��'0��+Z}��>)���$|&�i'±H�i.°�

2.�¡����î�$"��i'±H�;.°

@@���100 �A&()&b���9$4�%'E��l,)�¡��A�NQ $"��i/%�

�+\-Â

Rovp2 �Vref

100 �A� 25 k� (eq. 87)

���¬-E-(Rovp2 = 27 k�)$+�/��

Rovp1 � Rovp2 � �Vout,ovp

VREF 1� (eq. 88)

*>����(�������410 V$��·��E-�E&C+'K</%�

Rovp1 � 27 k� � �4102.5

1� � 4401 k� (eq. 89)

Kn�&p£��º�&Rovp1&56�)�ï &~�$|8)��%'�+��/%�*>����(�������(1,800 k��+ 1,800 k��+ 820 k�)& ��¡��$+�/%��þ�OVPAZ[��E&UV)��/%�

Vout,ovp �Rovp1 � Rovp2

Rovp2� VREF (eq. 90)

�1800 k � 1800 k � 820 k � 27 k

27 k� 2.5 V

� 412 V

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Ò��Figure 11)>�UV)�OVP�m ��¡��&|&$�L%'ÿ&VP��Ú��E&+�$dV@E�%�

Rovp2 = Rfb2

Rovp1 = Rfb1 + Rovp�@@��Rovp�OVP�m ��¡��&�÷)�'~�&���%�

��

Vout,nom �Rfb1 � Rfb2

Rfb2� VREF

Vout,ovp �Rovp1 � Rovp2

Rovp2� VREF �

�Rfb1 � Rovp � Rfb2

Rfb2� VREF

�@&2J&C$¬>%'E�E&C+'K</%�

Vout,ovp � Vout,nom �Rovp

Rfb2� VREF

J/��Q�b� ��+E&°$'��Ei)�OVP��+����/%�

�Rovp

Rfb2� VREF�

tu

@&���(����"�������������&2]8PFC&��$��)%'��&®�,���C�D$ÌÕ/%�U�ó®,)��@&g�h����PFC�1�2&|&$�L%'��)�E;<'��CE��S�$Dk/��4()jG)¿a�i'�300 W&��,������(����$4�-�@&�Cl�$H>/��ÌÕ�¤/)°\-���300 W&�������PFC&��)�%'�?��NCP1631EVB/D[3]$ÊÔ-�;.�@&���(����"�

�����ÓA,�.���D�tW1 ()(120 kHz&�z�X��W1 )$+��)�KK6S��20%~100%& 5())¿-�90 Vrms�wÜ95%E.V�.P+$y`�i'@E$>/��{y&Ï��NCP1631��^%'�������

PFC$��%'Ei)ABJj�C$6/%��V1J&Ï��*>����(����&300 W)�-@<S&C$�O�¬-$>/%�

Table 1. GENERAL EQUATIONS − SUMMARY

PowerComponents

Coil Selection

L �(Vin,rms)LL

2 � �Vout,nom 2� � (Vin,rms)LL�

(Pin,avg)max � Vout,nom � fOSC(nom)

(IL,pk)max � 2� �(Pin,avg)max

(Vin,rms)LL

(IL,rms)max � 13��

(Pin,avg)max

(Vin,rms)LL

MOSFETConduction Losses (Pon)max � 1

3� RDS(on) � �(Pin,avg)max

(Vin,rms)LL�2

� �1 8 2� � (Vin,rms)LL

3� � Vout,nom�

Bulk Capacitor

(�Vout)pk−pk �Pout,max

Cbulk � � � Vout,nom

Cbulk �2 � Pout,max � tHOLD−UP

Vout,nom2 Vout,min

2

(IC,rms)max � �16 2�9�

�(Pin,avg)max

2

(Vin,rms)LL � Vout,nom��(Pout)max

Vout,nom�2�

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Table 1. GENERAL EQUATIONS − SUMMARY (continued)

Brown-out Block

BO Upper Resistor

Rbo1 �

(Vin,avg)boH �(Vin,avg)boL � �1 fBO

3�fline��

IHYST

BO Bottom ResistorRbo2 �

Rbo1

�(Vin,avg)boL

VBO(th)� �1

fBO3�fline�� 1

BO Filtering Capacitor Cbo �Rbo1 � Rbo2

2� � Rbo1 � Rbo2 � fBO

Timing Resistor Pin3 Resistor Rt � 4026 � 103 � kBO � L � (Pin)HL�

Oscillator

Oscillator Frequency(No Frequency Foldback) fOSC(nom) �

52 � 10−6

COSC

Clamp Frequencyper Branch �fsw(max)

�nom

�fOSC(nom)

2� 26 � 10−6

COSC

Fold−ForwardPower Threshold (Pin)FF �

RFF15810 �

� (Pin)HL

Minimum Frequency(per Branch)

�fsw(max)�

min� 1

2 � RFmin � COSC � �0.22 � In�RFmin114000

RFmin143000��

FeedbackResistors

Feedback Bottom Resistor Rfb2 �VREFIFB

Feedback Upper Resistor Rfb1 � Rfb2 � �Vout,nom

VREF 1�

OVP Resistors

OVP Bottom Resistor Rovp2 �VREFIFB

OVP Upper Resistor Rovp1 � Rovp2 � �Vout,ovp

VREF 1�

LoopCompensation

Cp Capacitor of theType2 Compensation Cp �

1.06 � 10−6 � (Pin)HL

Cbulk � fc 2 � (Vout,nom)2

Cz Capacitor of theType2 Compensation Cz � 15 � Cp

Rz Resistor of theType2 Compensation Rz �

2� � Cz � fc

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Table 1. GENERAL EQUATIONS − SUMMARY (continued)

Current Limitation

Maximum Level of theInput Current

Iin,max � 2 2� �(Pin,avg)max

(Vin,rms)LL�� �

1 Vout,nom

4 � �Vout,nom � 2� � (Vin,rms)LL�����

Iin,max � 2 2� �(Pin,avg)max

(Vin,rms)LL� �1

Vout,nom

4 � 2� � (Vin,rms)LL

�if (Vin,rms)LL

Vout,nom

2 2�

if (Vin,rms)LL �Vout,nom

2 2�

Current Sense Resistor RCS �PRcs � (Vin,rms)LL

2

(Pin,avg)max2

Over Current Resistor ROCP �RCS � Iin,max

210 � 10−6

fOSC(nom)�W1 !�[Nb���&Y\]

W1 �%�

(fsw(max))�(W1 !�[Nb���&�>&)uHP)�%'�z�X��W1 �%�

�fOSC(nom)

2�

(fsw(max))min�W1 !�[Nb��&¬-E

-Z}��uHP)�%'I��X��W1 �%�

Vout,nom�PFC�1�2&�zmOJ(KLGAZ[)�%�

(Vin,rms)LL�X��&rmsJ&I�AZ[�%�

(Pin,avg)max�`O´µO&I�AZ[�%�

(IL,pk)max���������PFC(3^_n)&13&HP)î.1/<'I�r��9�%�

(IL,rms)max���������PFC(3^_n)&13&HP)î.1/<'I�rms9�%�

Pon�MOSFET&'���%(13&HP)�

RDS(on)�MOSFET&Q�n~��%(13&HP)�

(�Vout)pk−pk�mOr��"Å�"r��"���

[�%�

��X��&�W1 �%(� = 2� fline)�

fline�X��W1 �%�

Cbulk�b[�"c�d�e�%�

tHOLD−UP�ÎL&À�[N���n��%�

(IC,rms)max�b[�"c�d�e&rms9�%�¥,S<��O��~� 5$qL-./%�

Vout,min�y9c�b���Ԫ`<0���mO

J&I�AZ[�%�

(Pin)HL������t~�&+�)U\-�;<

'�PFC�1�2+���i'��I�&AZ[

�%��`n&¯¶$�/-�((Pin)HL)E-�µÞ;<'I�`OO$�Uz30%�e'°$+�%'�+��/%�J/��

�(Pin)HL � 130% � (Pin,avg)max� (Pin)FF��@&°$ye\-.'�>�e�+��

�D�tW1 &�y(W1 !�[Nb��)$(ã%'`OOAZ[�%�

RFF�r�6EtX�N&�)���W1 !�[Nb��&�$|^%'~��%�

RFmin�Y\]r�EtX�N&�)���I�

W1 $-¾%'~��%�fOSC(nom))�-¥,S<��OC&~���fOSC(nom)&°)¿%'~U�&÷B$� -.

/?x�

Rfb1ERfb2�� ¬�Nb���m~��%�

Rovp1ERovp2��OVP�m~��%�

Vout,ovp�OVPmOJ�%�

VREF�f�&2.5 VJ� #A���%�

Rbo1ERbo2���X¢��¢��m~��%�

kBO��X¢��¢�&;<+�%�

�kBO �Rbo2

Rbo1 � Rbo2�

fBO��BOr�&[vªc�d�e(Cbo)E�Rbo1�

U�Rbo2&�=>6?)U\-¸S<�W1 å�%�

IHYST��¨�1����,�4�;<'�7 �A&f�9G�%�

(Vin,avg)boH�e�+^_$(ã�Ei&�´µG

;<�`OJ�%�

�(Vin,avg)boH � 2� � Vin,rms�

Page 21: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

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@<�°±�&����1�2&�>�%�

(Vin,avg)boL��´µ`OJ��@&°$ye'E�

�X¢��¢���+����/%�

�(Vin,avg)boH � 2 2�� � Vin,rms�

@<�°±�&����1�2&�>�%�

VBO(th)�f�&1 V�X¢��¢�J� #A���%�

Rz, CzECp�ëòMN�%�

fc��C�Q�bW1 �%�

RCS�9l��~��%�

PRcs�Rsensen®&���%�

�l,)�I�O&0.2%)�L%'E����î�EP+&���¡��A�NQ $"��i/

%�

ROCP�CSr�ERCS&�)��%'~���`O

9&I�AZ[(23&HP)U\-îï;<'>�9)$�L/%�

ëò)�%'Ò��60&()&]8s�2�$¼��i'UV)�ëò$�O/%��.W1 å$�U��.W1 )

�L%'@E��i/%���)��Cp$�ÌÕ°&4­/��i(RzECz&�½S��ó?�))�Vcontrolr�&���[$�;�THD$;S)#I%'@E��i/%�]8s�2�$�;%'@E��@&�ó$�d�i/%�]8s�2���I�30./���'@E+�i/%�

v1w 300 Way+,�)z]{|�}~�HP³E)�120 kHz&W1 �X��$+�/%�I�mOO+300 W&�>�`OO$I��Uz325 W)�L�i'EqL/%(X��+I�&�>�92%&P+"@<��'U�&¯¶$�1x��·,�°�%)�O�,((Pin)HL)��U��i.125%�J/�400 W)�L/��I�`OJ�90 Vrms����X��vmsJ+

81 V$',�Ei)e�+^_$(ã�X��\:+72 V{y)�\�Ei)�X¢��¢��w+�m;<'UV)�X¢��¢�"�C��&|&$�L/��KLGAZ[$390 V (Vout,nom = 390 V)�OVPAZ[$410 V (Vout,ovp = 410 V))�L/%�

100 �F&b[�"c�d�e$��/%�i�O+I�O&0.2%$',�.UV)�9~�$+�/%(PRsense = 0.2% (Pin,avg)max)�

Table 2. EQUATIONS − SUMMARY

PowerComponents

Coil Selection

L �902 � �390 2� � 90�

320 � 390 � 120 k� 140 �H

(IL,pk)max � 2� � 32090

� 5.0 A

(IL,rms)max � 13�� 320

90� 2.1 A

A 150−�H � 6 Apk � 2.5 Arms coil was selected

MOSFETConduction Losses (Pon)max � 1

3� RDS(on) � �320

90�2

� �1 8 2� � 903� � 390

� � 3 � RDS(on)

Bulk Capacitor

(�Vout)pk−pk �300

100 � � 2� � 60 � 390� 20 V (fline � 60 Hz)

Cbulk �2 � 300 � tHOLD−UP

3902 3302 � 0.014 � tHOLD−UP

(IC,rms)max � �16 2�9�

� 3252

90 � 390� �300

390�2� � 1.3 A

Brown-out Block

BO Upper ResistorRbo1 �

115 �65 � �1 10%3��

7 � 10−6 � 7450 k�� 7200 k�

BO Bottom ResistorRbo2 � 7200 � 103

�651

� �1 10%3�� 1

� 116 k� � 120 k�

BO Filtering CapacitorCbo �

7200 k � 120 k2� � 7200 k � 120 k � 10% � fline

� 13.5 � 10−6

fline� 220 nF

(fline � 60 Hz)

Page 22: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

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Table 2. EQUATIONS − SUMMARY (continued)

Timing Resistor Pin3 Resistor Rt � 4026 � 103 �120 k

7200 k � 120 k� 150 � � 400� � 16.2 k� � 18 k�

� (Pin)HL � 494 W

Oscillator

Oscillator Frequency(No Frequency Foldback) fOSC(nom) �

52 � 10−6

220 � 10−12 � 236 kHz

Clamp Frequencyper Branch �fsw(max)

�nom

�fOSC(nom)

2� 118 kHz

Fold-ForwardPower Threshold (Pin)FF �

RFF15810 �

� (Pin)HL �4700 �

15810 �� 494 � 147 W

Minimum Frequency(per Branch)

�fsw(max)�

min� 1

2 � 270 k � 220 p � �0.22 � In�270 k114 k270 k143 k

��� 19.8 kHz

FeedbackResistors

Feedback Bottom Resistor Rfb2 � 2.592 �

� 27 k�

Feedback Upper Resistor Rfb1 � 27 k � �3902.5

1� � 4185 k�

OVP Resistors

OVP Bottom Resistor Rovp2 � 2.592 �

� 27 k�

OVP Upper Resistor Rovp1 � 27 k � �4102.5

1� � 4400 k�

LoopCompensation

Cp Capacitor of theType2 Compensation Cp � 1.06 � 10−6 � 494

100 � 10−6 � 202 � 3902 � 86 nF � 68 nF

Cz Capacitor of theType2 Compensation Cz � 15 � 68 n � 1.02 �F � 1.0 �F

Rz Resistor of theType2 Compensation Rz �

2� � 1.0 � � 20

� 31.8 k� � 33 k�

Current Limitation

Maximum Level of theInput Current Iin,max � 2 2� � 325

90�� �

1 390

4 � �390 � 2� � 90������ 6.4 A

Current Sense Resistor RCS � 0.2% � 325 � 902

3252 � 49.8 m� � 50 m�

Over Current Resistor ROCP � 50 � 10−3 � 6.4210 � 10−6 � 1.52 k� � 1.5 k�

Page 23: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

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Figure 12. Application Schematic

Dio

des

D16

and

D17

are

impl

emen

ted

to d

eriv

e th

e in

-rus

h cu

rren

t tha

t can

take

pla

ce d

urin

g th

e st

art-

up p

hase

. D17

is a

ctua

lly o

ptio

nal.

It sh

ould

be

adde

d on

ly if

the

volta

geac

ross

the

curr

ent s

ense

res

isto

r ca

n be

com

e so

hug

e du

ring

the

in-r

ush

curr

ent,

that

it c

ause

s th

e cu

rren

t sen

se c

urre

nt (

I pin

9) to

exc

eed

10 m

A.

If pl

aced

, the

D17

forw

ard

volta

ge m

ust b

e hi

gh e

noug

h no

t to

clam

p th

e cu

rren

t sen

se v

olta

ge (

R24

vol

tage

) in

nor

mal

ope

ratio

n. In

our

app

licat

ion,

the

R24

vol

tage

is lo

wer

than

(50

m�

6

.4 A

), i.

e., 3

20m

V w

hich

is fa

r be

low

the

D17

forw

ard

volta

ge.

D21

, R2

and

C34

are

to la

tch

off t

he p

art w

hen

VC

C e

xcee

ds 1

7.5

V (1

5 V

of t

he Z

ener

dio

de +

the

2.5

V o

f the

inte

rnal

com

para

tor t

hres

hold

). W

hen

a fa

ult i

s de

tect

ed, t

he c

ircui

t is

perm

anen

tly s

hutd

own

until

the

part

is r

eset

. If s

uch

a pr

otec

tion

is n

ot n

eces

sary

, the

se c

ompo

nent

s ca

n be

rem

oved

and

pin

10

can

be g

roun

ded.

R122680 k�

R121680 k�

R122680 k�

Earth

N

L

90−265 VACC61 �FL4

150 �H

C134.7 nFType = Y1

C124.7 nF

Type = Y1

CM1 Type = X2C18680 nF

IN

+ −

C1100 nF

KBU6KU1

R41

1800 k�

R42

1800 k�

R43

1800 k�

R44

1800 k�

R45

120 k�

C28 220 nF

C27 1 nFOVP

in

VOUTR39

1800 k�

R38

1800 k�

R23x

1800 k�

R40

27 k�

R321800 k�

R311800 k�

I IN

1N54

06

D16

Vaux2

R18820 k�

R1422 k�

C221 nF

R25

27 k�

R3318 k�

R34

270

k�

C15220 pF

C20150 pF

I IN

C251 �F

R3639 k�

R374.7 k�

OVPin

161

152

143

134

125

116

107

98

1N54

06

D17

R2450 m�

(3 W)R1

1.8 k�

R21 k�

DRV 2

D2115 V

C3410 nF

C33100 nF

C32100 �F

15 V+ −

VCC

R1522 k�

R72.2 �

C30100 nF

pfc OK

D141N4148 Q1

2N2907

R1110 k�

X4

SP

P11

N60

D4MUR550

R172.2 �

D151N4148 Q2

2N2907

R2010 k�

DRV 2

X6SPP11N60E

C2x100 �F/450 V

+

X1

X7

VIN

VOUT

Icoil2

Vaux2

Icoil1

D5

MU

R55

0

+ −

390 V

Page 24: AND8407JP - NCP1631で駆動するインタリーブ型PFCステー …Semiconductor Components Industries, LLC, 2013 March, 2013 − Rev. 21 Publication Order Number: AND8407JP/D

AND8407/D

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����

[1] Joel Turchi, “Characteristics of Interleaved PFCStages”, Application Note AND8355,http://www.onsemi.com/pub/Collateral/AND8355−D.PDF

[2] Joel Turchi, “Designing a high-efficiency, 300-W,wide mains interleaved PFC”, Application NoteAND8354,http://www.onsemi.com/pub/Collateral/AND8354−D.PDF

[3] Stephanie Conseil, “Performance of a 300-W, widemains interleaved PFC driven by the NCP1631”,NCP1631EVB/D,http://www.onsemi.com/pub/Collateral/NCP1631EVB−D.PDF

ON Semiconductor��ON�� !Semiconductor Components Industries, LLC (SCILLC)�"#$%&'�(SCILLC!)*+$%+,-.+/01234�5678. 9��.:;78��<�3��(SCILLC�=>?)*�@A9BC�D EFG!+HI&J�K�&L�(www.onsemi.com/site/pdf/Patent-Marking.pdfMNSCILLC!OPQR&S�C�D '�=>�TU;VW.:;X8��(SCILLC!+)�Y6�Z[�=>�@\] �RGX^+_`;ab+SCILLC!cZ+=>def�gAdhAijkl�FiQ�mn<opb+) q) r+st6+uv6Qwx;yz{+S|j }�~|QF�mn;����<�3��(SCILLC�����Dd��� �~|���]�'��%�6������!+�Q�J�C�����&!T�����]{'��� T�R���]�!��33< �� T�����]{'�(�%�6�;yz��G��-�����!+���� ¡¢£ ¤¥G��J�C�����¦3 §�~|Q¨|©QjQF(SCILLC!+ª�)*.dª�4�.:�I+FiQ��«K��<¬­RQF<�3��(SCILLC=>!+®¯°�±²6³´;Y63����µ¶°�hA+k·¸¹;Y63RZJ�C�����+SCILLC=>�º» ¤�+¼½d¾;¿LÀS�ÁÂ{ÀS�Ã�¤WQJ�C�����QÄ°�hA;Y6 �Å~|GÆjb+cZ��<ǨGFQF(ÈFÉ{+ª�¤WQÊË~|Z<�&!QF+Ì*��J�C�����A SCILLC=>;ÍÎcZ!hARZÏ\+Z3ÐÑRÒG ÆFG+SCILLC{ª�Ó>��ÅcZ!=Ô �RGÕÖ×¥Z3ØÙ~|Z3RG<+ÈFÉ!+ª�¤WQÊËaÚhA+cZÌ*��hA �ÛRZ¼½d¾ij+ÜÝ+Þ!�Ý6 kl���G����¶+ßA+wx+àß+cZáâQãäåæ���G;çèR+SCILLC3ª�éê+ë0ê+ìíî+�Ûíî+ïðñ 9RG+òj�wx<óÐQF<�3��(SCILLC!�Aôíõö?÷røù�

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