LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 LC5550LD 䉲䊥䊷䉵 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev.1.2 䉰䊮䉬䊮㔚᳇ᩣᑼળ␠ SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp Copy Right: SANKEN ELECTRIC CO., LTD. Page.1 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 ⋡ᰴ ⷐ------------------------------------------------------------------------------------------------ 3 1. ⛘ኻᦨᄢቯᩰ ------------------------------------------------------------------------------- 4 2. 㔚᳇⊛․ᕈ ---------------------------------------------------------------------------------- 5 2.1 ᓮㇱ㔚᳇⊛․ᕈ ------------------------------------------------------------------- 5 2.2 MOSFET ㇱ㔚᳇⊛․ᕈ ------------------------------------------------------------ 5 3. ࡉࡠ࠶ࠢ࠳ࠗࠕࠣࡓ ------------------------------------------------------------------ 6 4. ฦ┵ሶᯏ⢻ ---------------------------------------------------------------------------------- 6 5. ᔕ↪࿁〝 ---------------------------------------------------------------------------------- 7 6. ᄖᒻኸᴺ ------------------------------------------------------------------------------------- 8 7. ᝲශ᭽ ------------------------------------------------------------------------------------- 8 8. േ⺑ ------------------------------------------------------------------------------------- 9 8.1 േേ ------------------------------------------------------------------------------- 9 8.2 䉥䊮ᓮേ ----------------------------------------------------------------------13 8.3 PWM േ ----------------------------------------------------------------------------14 8.4 ᡆૃᝄേ ------------------------------------------------------------------------15 8.5 ㆊ㔚⼔ᯏ⢻ 䋨OVP䋩 ----------------------------------------------------------17 8.6 8.7 8.8 8.9 8.10 VCC ┵ሶㆊ㔚⼔ᯏ⢻䋨VCC_OVP䋩 ----------------------------------------17 OCP ┵ሶㆊ㔚⼔ᯏ⢻䋨OCP_OVP䋩 ---------------------------------------18 ㆊ⽶⩄⼔ᯏ⢻ 䋨OLP䋩-----------------------------------------------------------19 ㆊ㔚ᵹ⼔ᯏ⢻䋨OCP䋩 ------------------------------------------------------------20 ㆊᾲ⼔ᯏ⢻(TSD) ----------------------------------------------------------------21 8.11 ᦨᄢ䉥䊮ᤨ㑆㒢ᯏ⢻ -------------------------------------------------------------21 9. ࿁〝ㇱຠߩቯᢙ⸳ቯߦ㑐ߔࠆᵈᗧ㗄 --------------------------------------------22 ᵈᗧᦠ߈-----------------------------------------------------------------------------------------23 Copy Right: SANKEN ELECTRIC CO., LTD. Page.2 Rev. 1.2 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 ⷐ Rev. 1.2 䊌䉾䉬䊷䉳 DIP8 LC5550LD 䉲䊥䊷䉵䈲䇮PWM ᣇᑼ䈫䇮ᡆૃᝄᣇᑼ 䈮ኻᔕน⢻䈭㕖⛘✼↪䈱䊋䉾䉪 LED 䊄䊤䉟䊋 IC 䈪䈜䇯 ᧄ IC 䈲䇮䊌䊪䊷MOSFET 䈫ᓮ IC 䉕 1 䊌䉾䉬䊷䉳䈮 䈚䈩䈍䉍䇮࿁〝䈲䇮1 䉮䊮䊋䊷䉺ᣇᑼ䈪ዊဳൻ䈮ኻᔕ䈚 䉁䈜䇯䉁䈢䇮ᐔဋ㔚ᵹᓮ䈮䉋䉍㜞ജ₸䈪䈜䇯లታ䈚 䈢⼔ᯏ⢻䈮䉋䉍᭴ᚑㇱຠ䈏ዋ䈭䈒䇮䉮䉴䊃䊌䉤䊷䊙䊮 䉴䈱㜞䈇㔚Ḯ䉲䉴䊁䊛䉕ኈᤃ䈮᭴ᚑ䈪䈐䉁䈜䇯 ․㐳 䉝䊒䊥䉬䊷䉲䊢䊮 l ᓮ䈲 PWM ᣇᑼ䈫䇮ᡆૃᝄᣇᑼ䈮ኻᔕ l 䉥䊮ᓮ࿁〝ౝ⬿ 䋨ᐔဋ㔚ᵹᓮ䈮䉋䉍㜞ജ₸䈏น⢻䋩 l 䉸䊐䊃䉴䉺䊷䊃ᯏ⢻ౝ⬿ l 䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻ౝ⬿ 䋨േᕈ䈱ะ䇮േᤨ䈱 Vcc 㔚ૐਅ䉕ᛥ䇮 Vcc 䉮䊮䊂䊮䉰䈱ૐኈ㊂ൻ䇮ᓮ࿁〝㔚Ḯ䉕䉶 䊤䊚䉾䉪䉮䊮䊂䊮䉰䈪䊋䉾䉪䉝䉾䊒䈏น⢻䋩 l 䊥䊷䊂䉞䊮䉫䊶䉣䉾䉳䊶䊑䊤䊮䉨䊮䉫ᯏ⢻ౝ⬿ l ᦨᄢ䉥䊮ᤨ㑆㒢࿁〝ౝ⬿ l ⼔ᯏ⢻ ㆊ㔚ᵹ⼔(OCP) ------- 䊌䊦䉴䍃䊋䉟䍃䊌䊦䉴 ㆊ㔚⼔(OVP) ------- 䊤䉾䉼 ㆊ⽶⩄⼔(OLP) ------- 䊤䉾䉼 ㆊᾲ⼔(TSD) ---------- 䊤䉾䉼 l LED ᾖᯏེ l LED 㔚 䉲䊥䊷䉵䊤䉟䊮䉝䉾䊒 MOSFET ຠฬ VDSS (MIN) PWM േᵄᢙ fOSC (TYP) RDS(ON) (MAX) ᦨᄢ䉥䊮ᤨ㑆 tON(MAX) (TYP) POUT* AC230V / Universal LC5555LD 650V 3.95Ω 72kHz 9.3µs 13W / 10W LC5556LD 650V 1.9Ω 60kHz 11.2µs 20W / 16W *⸥ജ㔚ജ䈲ᾲቯᩰ䈮䉅䈫䈨䈇䈩䈇䉁䈜䇯ᦨᄢജ㔚ജ䈲䇮ᾲቯᩰ䈱 120%䌾140%⒟ᐲ䉁䈪ജน⢻䈪䈜䇯 䈢䈣䈚䇮㔚ᵹ୯䈏ᄢ䈐䈇႐ว䈲䇮ജ㔚ജ䈱㒢䉕ฃ䈔䉎䈏䈅䉍䉁䈜䇯 Copy Right: SANKEN ELECTRIC CO., LTD. Page.3 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 1. ⛘ኻᦨᄢቯᩰ · ⚦ౝኈ䈲䇮ຠ䈗䈫䈱᭽ᦠ䉕ෳᾖ㗿䈇䉁䈜 · 㔚ᵹ୯䈱ᭂᕈ䈲 IC 䉕ၮḰ䈫䈚䈩䇮䉲䊮䉪䈏(+)䇮䉸䊷䉴䈏(−)䈫ⷙቯ䈚䉁䈜 · ․⸥䈱䈭䈇႐ว䈱᧦ઙ Ta=25°C ┵ሶ ⸥㩷 ภ ⷙᩰ୯ න 㩷 ⠨ 8–1 IDPEAK 2.5 A LC5555LD 4.0 A LC5556LD 8–1 EAS 47 mJ LC5555LD 86 mJ LC5556LD ᓮ ㇱ 㔚 Ḯ 㔚 2–1 VCC 35 V O C P ┵ ሶ 㔚 3–1 VOCP −2.0䌾+5.0 V ┵ ሶ 㔚 4–1 VCOMP −0.3䌾+7.0 V I S E N S E ┵ ሶ 㔚 6–1 VSEN −0.3䌾+5.0 V MOSFET ㇱ⸵ኈ៊ᄬ 8–1 PD1 0.97 W ᐲ ― TOP −55䌾+125 °C ᐲ ― Tstg −55䌾+125 °C ᐲ ― Tch +150 °C 㗄㩷 ⋡ 䊄 䊧 䉟 䊮 㔚 ᵹ 䉝䊋䊤䊮䉲䉢䊶䉣䊈䊦䉩⠴㊂ C O M P േ 䉼 ሽ 䊞 䊈 ࿐ ᷷ ᷷ 䊦 ᷷ Copy Right: SANKEN ELECTRIC CO., LTD. Page.4 ၮ᧼ታⵝᤨ ၮ᧼䉰䉟䉵㩷 15mm×15mm LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 2. 㔚᳇⊛․ᕈ · ⚦ౝኈ䈲䇮ຠ䈗䈫䈱᭽ᦠ䉕ෳᾖ㗿䈇䉁䈜 · 㔚ᵹ୯䈱ᭂᕈ䈲 IC 䉕ၮḰ䈫䈚䈩䇮䉲䊮䉪䈏(+)䇮䉸䊷䉴䈏(−)䈫ⷙቯ䈚䉁䈜 2.1 ᓮㇱ㔚᳇⊛․ᕈ ․⸥䈱䈭䈇႐ว䈱᧦ઙ Ta=25°C䇮VCC=20V 㗄㩷 ⋡ ⸥㩷 ภ MIN VCC(ON) VCC(OFF) ICC(ON) VSTARTUP 13.8 8.4 ― 18 −8.5 9.5 15.1 9.4 ― 21 −4.0 11.0 17.3 10.7 4.7 24 −1.5 12.5 V V mA V mA V 60 50 8.0 9.0 0.30 −0.21 −36 12 ― 0.14 0.11 72 60 9.3 11.2 0.55 −0.2 −24 24 600 0.24 0.16 84 70 11.2 13.4 0.80 −0.19 −12 36 ― 0.34 0.21 kHz kHz µs µs V V µA µA ns V V −0.92 −120 2.2 4.1 28.5 135 −0.8 −40 2.6 4.5 31.5 ― −0.68 −10 3.0 4.9 34.0 ― V μA V V V °C 㔚Ḯേേ േ 㐿 ᆎ 㔚 Ḯ 㔚 േ ᱛ 㔚 Ḯ 㔚 േ ᤨ ࿁ 〝 㔚 േ ࿁ 〝 േ 㔚 േ 㔚 േ 㔚 ᵹ ଏ ⛎ 䈚 䈐 䈇 㔚 ㅢᏱേ * ᵹ ᵹ * 2–1 2–1 2–1 8–1 2–1 2–1 ICC(STARTUP) VCC(BIAS) P ᢙ 8–1 fOSC 㑆 8–1 tON(MAX) W ᦨ M ᄢ േ 䉥 䊮 ᵄ ᤨ ⷙ㩷 㩷 ᩰ㩷 㩷 ୯ TYP MAX ┵ሶ 4–1 VCOMP(MIN) COMP ┵ሶᓮਅ㒢㔚 6–1 VSEN(TH) 䉣 䊤 䊷 䉝 䊮 䊒 ၮ Ḱ 㔚 4–1 ISEN(SOURCE) 䉣 䊤 䊷 䉝 䊮 䊒 䉸 䊷 䉴 㔚 ᵹ 4–1 ISEN(SINK) 䉣 䊤 䊷 䉝 䊮 䊒 䉲 䊮 䉪 㔚 ᵹ 3–1 tON(LEB) 䊥䊷䊂䉞䊮䉫䊶䉣䉾䉳䊶䊑䊤䊮䉨䊮䉫ᤨ㑆 3–1 VBD(TH1) ᡆૃᝄേ䈚䈐䈇㔚 1 3–1 VBD(TH2) ᡆૃᝄേ䈚䈐䈇㔚 2 ⼔േ 3–1 VOCP ㆊ 㔚 ᵹ ᬌ 䈚 䈐 䈇 㔚 3–1 IOCP O C P ┵ ሶ ᵹ 㔚 ᵹ 3–1 VBD(OVP) OCP ┵ሶ OVP 䈚䈐䈇㔚 4–1 VCOMP(OLP) O L P 䈚 䈐 䈇 㔚 2–1 VCC(OVP) VCC ┵ሶ OVP 䈚䈐䈇㔚 ― Tj(TSD) ᾲ ⼔ േ ᷷ ᐲ *䇱䈱ຠ䈮䈍䈇䈩䈲䇮VCC(BIAS)> VCC(OFF)䈱㑐ଥ䈏ᚑ䉍┙䈧 න ⠨ VCC= 13V LC5555LD LC5556LD LC5555LD LC5556LD 2.2 MOSFET ㇱ㔚᳇⊛․ᕈ ․⸥䈱䈭䈇႐ว䈱᧦ઙ Ta=25°C 㗄㩷 ⋡ ┵ሶ ⸥㩷 ภ 䊄 䊧 䉟 䊮 䊶 䉸 䊷 䉴 㑆 㔚 䊄 䊧 䉟 䊮 ṳ 䉏 㔚 ᵹ 8–1 8–1 VDSS IDSS O ᛫ 8–1 RDS(ON) 䉴 䉟 䉾 䉼 䊮 䉫 䊶 䉺 䉟 䊛 8–1 tf ― θch-c ᾲ N ᛶ ᛶ ᛫ Copy Right: SANKEN ELECTRIC CO., LTD. Page.5 ⷙ㩷 㩷 ᩰ㩷 㩷 ୯ MIN TYP MAX 650 ― ― ― ― 300 ― ― 3.95 ― ― 1.9 ― ― 250 ― ― 400 ― ― 42 ― ― 35.5 න 㩷 ⠨ V μA Ω Ω ns ns °C/W °C/W LC5555LD LC5556LD LC5555LD LC5556LD LC5555LD LC5556LD LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 3. 䊑䊨䉾䉪䉻䉟䉝䉫䊤䊛 8EE ԙ ԟ &56 56#4672 65& 78.1 4GI &TX $KCU 182 Ԙ 5)0& 5 4 3 1%2 Ԛ ԝ +5'05' $QVVQO &GVGEVKQP 1.2 15% 16# 1%2 0( .'$ Ԝ 4GI (GGFDCEM %QPVTQN ԛ %1/2 4GI 4. ฦ┵ሶᯏ⢻ S/GND 1 8 VCC 2 7 OCP 3 6 ISENSE COMP 4 5 NF ┵ሶ⇟ภ 1 ⸥ภ ᯏ⢻ S/GND MOSFET 䉸䊷䉴䋯ᓮㇱ GND 2 VCC ᓮ࿁〝㔚Ḯജ䋯ㆊ㔚⼔ାภജ 3 OCP/BD ㆊ㔚ᵹ⼔䋯ᡆૃᝄାภജ 䋯ㆊ㔚⼔ାภജ 4 COMP 䊐䉞䊷䊄䊋䉾䉪⋧ఘ 5 NF 䋨ᯏ⢻䈭䈚*䋩 6 ISENSE 䊐䉞䊷䊄䊋䉾䉪㔚ᵹᬌ 7 ― 䋨ᛮ䈐䊏䊮䋩 8 D/ST MOSFET 䊄䊧䉟䊮䋯േ㔚ᵹജ D/ST *NF䋨5 ⇟┵ሶ䋩䈲䇮േቯ䈱䈢䉄ቯ㔚䈪䈅䉎 S/GND 䊌䉺䊷䊮 䋨1 ⇟┵ሶ㔚䋩䈻ᦨ⍴〒㔌䈪ធ⛯ Copy Right: SANKEN ELECTRIC CO., LTD. Page.6 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 5. ᔕ↪࿁〝 LC5550LD 䉲䊥䊷䉵䈲䇮PWM ᣇᑼ䈫ᡆૃᝄᣇᑼ䈱㕖⛘✼䊋䉾䉪䉮䊮䊋䊷䉺䉕᭴ᚑ䈜䉎䈖䈫䈏䈪䈐䉎 IC 䈪䈜䇯 ࿑ 5-1 䈲 PWM ᣇᑼ䈱ᔕ↪࿁〝䈪䈜䇯േ䈱⚦䈲“8.3 PWM േ“䉕ෳᾖ䈚䈩䈒䈣䈘䈇䇯 ࿑ 5-2 䈮ᡆૃᝄᣇᑼ䈱ᔕ↪࿁〝䉕␜䈚䉁䈜䇯ᡆૃᝄᣇᑼ䈲䇮PWM ᣇᑼ䈱࿁〝᭴ᚑ䈮ㆃᑧ࿁〝(D7, D8, R7, C8)䉕ㅊട䈚䉁䈜䇯䈖䉏䈮䉋䉍䇮േᤨ䈮ജ㔚䈏┙䈤䈏䉎䈫䈫䉅䈮 OCP/BD ┵ሶ㔚䈏䈚䉁䈜䇯 OCP/BD ┵ሶ㔚䈏ᡆૃᝄേ䈚䈐䈇㔚䈮㆐䈜䉎䈫䇮PWM േ䈎䉌ᡆૃᝄേ䈮ಾ䉍ᦧ䉒䉍䉁䈜䇯േ䈱 ⚦䈲“8.4 ᡆૃᝄേ“䉕ෳᾖ䈚䈩䈒䈣䈘䈇䇯 R1 D6 R2 U1 NF COMP LC5550LD 4 5 D3 D4 3 OCP/BD Contro1 6 ISENSE 2 D/ST 8 VAC 1 VCC C3 C4 C5 S/GND R4 R3 D2 D1 R5 C6 C2 L1 R6 C1 D5 LED C7 ࿑ 5-1 ᔕ↪࿁〝 1㩷 PWM ᣇᑼ R1 D6 R2 U1 5 6 ISENSE D3 D4 D/ST 8 VAC D1 COMP LC5550LD 4 Contro1 NF D7 3 OCP/BD 2 1 VCC C3 S/GND C4 C5 R5 C6 C1 C8 C2 R3 D2 R7 D8 R4 L1 CV R6 D5 ࿑ 5-2㩷 ᔕ↪࿁〝 2㩷 ᡆૃᝄᣇᑼ Copy Right: SANKEN ELECTRIC CO., LTD. Page.7 C7 LED LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 6. ᄖᒻኸᴺ DIP8 NOTES: 1) න䋺mm 2) Pb 䊐䊥䊷ຠ(RoHS ኻᔕ)䈪䈜 7. ᝲශ᭽ 8 LC555× Part Number SKYMDL Lot Number 1 Y = Last digit of year (0 to 9) M = Month (1 to 9,O,N or D) D = Period of days (1 to 3) 1 : 1st to 10th 2 : 11th to 20th 3 : 21st to 31st Sanken Control Number Copy Right: SANKEN ELECTRIC CO., LTD. Page.8 Rev. 1.2 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8. േ⺑ 㔚ᵹ୯䈱ᭂᕈ䈲䇮IC 䉕ၮḰ䈫䈚䈩䉲䊮䉪䉕“+”䇮䉸䊷䉴䉕“−”䈫ⷙቯ䈚䉁䈜䇯 ․⸥䈏䈭䈇႐ว䈱․ᕈᢙ୯䈲䇮LC5555LD 䈱᭽䈮Ḱ䈛䇮TYP ୯䉕⸥䈚䉁䈜䇯 8.1 േേ 8.1.1 േᤨ㑆 t START 㻍 C2 ´ 䈖䈖䈪䇮 VCC(ON) - VCC ( INT) LC5550LD Contro1 ࿑ 8-1 䈮 VCC ┵ሶㄝ࿁〝䉕␜䈚䉁䈜䇯䊋䉾䉪䉮䊮 䊋䊷䉺䈲࿁〝䈱᭴ᚑ䇮ജ㔚 Vo 䈎䉌 IC 䈱㔚Ḯ䉕ଏ ⛎䈜䉎䈖䈫䈏น⢻䈪䈜䇯 IC 䈲േ࿁〝䉕ౝ⬿䈚䇮േ࿁ 〝䈲 D/ST ┵ሶ䈮ធ⛯䈚䈩䈇䉁䈜䇯IC ౝㇱ䈪ቯ㔚ᵹൻ䈚 䈢േ㔚ᵹ ICC(STARTUP)= −4.0mA 䈲䇮VCC ┵ሶ䈮ធ⛯䈚 䈢㔚⸃䉮䊮䊂䊮䉰 C2 䉕ల㔚䈚䇮VCC ┵ሶ㔚䈏േ㐿 ᆎ㔚 VCC(ON)= 15.1V 䉁䈪䈜䉎䈫䇮IC 䈲േ䉕㐿ᆎ䈚 䉁䈜䇯㔚Ḯേᓟ䇮IC ౝㇱ䈪⥄േ⊛䈮േ࿁〝䈏ㆤᢿ䈚䇮 േ࿁〝䈮䉋䉎㔚ജᶖ⾌䈲䈭䈒䈭䉍䉁䈜䇯 േᤨ㑆䈲䇮C2 䈱䉮䊮䊂䊮䉰ኈ㊂䈪䉁䉍䉁䈜䇯C2 䈲䇮 䉶䊤䊚䉾䉪䉮䊮䊂䊮䉰䉅䈚䈒䈲䊐䉞䊦䊛䉮䊮䊂䊮䉰䉕↪䈚䇮 ৻⥸⊛䈭㔚Ḯ᭽䈱႐ว䇮0.22μF䌾22μF ⒟ᐲ䈮䈭䉍䉁䈜䇯 േᤨ㑆䈱▚୯䈲䇮ᰴᑼ䋨1䋩䈪▚䈚䉁䈜䇯 D4 D3 8 1 S/GND R3 D1 D6 C2 D/ST VAC R1 VCC 2 R4 D5 C1 ࿑ 8-1㩷 VCC ┵ሶㄝ࿁〝 ------------ (1) 㩷㩷 I CC (STARTUP ) tSTART 䋺 േᤨ㑆 䋨s䋩 VCC(INT) 䋺 VCC ┵ሶ䈱ೋᦼ㔚 䋨V䋩 8.1.2 ૐജേᱛ࿁〝䋨UVLO䋺Undervoltage Lockout䋩 ࿑ 8-2 䈮 VCC ┵ሶ㔚䈫࿁〝㔚ᵹ ICC 䈱㑐ଥ䉕␜䈚䉁䈜䇯VCC ┵ሶ㔚䈏 VCC(ON)= 15.1V 䈮㆐䈜䉎䈫䇮ᓮ ࿁〝േ䉕㐿ᆎ䈚䇮࿁〝㔚ᵹ䈏Ⴧട䈚䉁䈜䇯ᓮ࿁〝േᓟ䇮VCC ┵ሶ㔚䈏േᱛ㔚 VCC(OFF)= 9.4V 䈮 ૐਅ䈜䉎䈫䇮ૐജᤨേᱛ䋨UVLO䋺Undervoltage Lockout䋩࿁〝䈮䉋䉍ᓮ࿁〝േ䉕ᱛ䈚䇮ౣ䈶േ೨䈱 ⁁ᘒ䈮ᚯ䉍䉁䈜䇯 ቯᏱേᤨ䈲䇮㔚Ḯ᭽䈱ജᄌേ▸࿐ౝ䈪䇮VCC ┵ሶ㔚䈏ᰴᑼ䈱▸࿐䈮䈭䉎䉋䈉䈮⺞ᢛ䈚䉁䈜䇯⋡䈫 䈚䈩䈲 20V ⒟ᐲ䈫䈭䉍䉁䈜䇯 ( ) ( 12.5(V) VCC ( BIAS) MAX < VCC < 28.5(V) VCC ( OVP ) MIN ) ࿁〝㔚ᵹ ICC േ ᱛ ICC䋨ON䋩= 4.7mA 䋨MAX䋩 9.4V VCC䋨OFF䋩 15.1V VCC䋨ON䋩 VCC┵ሶ㔚 ࿑ 8-2㩷 VCC ┵ሶ㔚䈫࿁〝㔚ᵹ ICC Copy Right: SANKEN ELECTRIC CO., LTD. Page.9 L1 D2 VO LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 ജ㔚䈏䇮㔚Ḯ᭽䈱ജᄌേ▸࿐ౝ䈪⸥䈱▸࿐ౝ䈱႐ว䈲䇮VO 䈎䉌⋥ធ IC 䈱㔚Ḯ䉕ଏ⛎䈜䉎䈖䈫䈏น ⢻䈪䈜䋨࿑ 8-1䋩䇯 ജ㔚䈏⸥䈱▸࿐䉕䈋䉎႐ว䇮䉿䉢䊅䊷䉻䉟䉥䊷䊄 D7 䉕ᝌ䈚䈩 IC 䈮㔚Ḯ䉕ଏ⛎䈚䉁䈜䋨࿑ 8-3䋩䇯ജ 㔚䈏㜞䈒䇮䉿䉢䊅䊷䉻䉟䉥䊷䊄䈱៊ᄬჇട䈏 ᔨ䈘䉏䉎႐ว䇮䉁䈢䈲ജ㔚䈏⸥㔚▸࿐䉋䉍ૐ䈇႐ว䈮䈲䇮 䉮䉟䊦䉕䊃䊤䊮䉴᭴ㅧ䈮䈚䈩 VCC ┵ሶ↪䈱Ꮞ䈐✢䉕ᚑ䈚䇮IC 䈮㔚Ḯ䉕ଏ⛎䈚䉁䈜䋨࿑ 8-4䋩䇯 Contro1 LC5550LD D7 C2 D/ST 8 D6 R1 VCC 2 1 S/GND R3 R4 L1 D5 ࿑ 8-3 VCC ┵ሶㄝ࿁〝䋨VCC > VCC(OVP)MIN 䈱႐ว䋩 Contro1 LC5550LD C2 D/ST 8 D6 R1 VCC 2 1 S/GND R3 R4 T1 D5 ࿑ 8-4 VCC ┵ሶㄝ࿁〝䋨VCC < VCC(BIAS)MAX 䉁䈢䈲 VCC > VCC(OVP)MIN 䈱႐ว䋩 Copy Right: SANKEN ELECTRIC CO., LTD. Page.10 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.1.3 䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻ ࿑ 8-5 䈮㔚Ḯേᤨ䈱 VCC ┵ሶ㔚ᵄᒻ䉕␜䈚䉁䈜䇯 VCC ┵ሶ㔚䈏ૐਅ䈚䇮VCC(OFF)= 9.4V 䈮㆐䈜䉎䈫ᓮ࿁〝䈏ᱛ䈚䈩േਇ⦟䈏↢䈛䉎႐ว䈏䈅䉍䉁䈜䇯䈖䉏 䉕㒐䈓䈢䉄䇮VCC ┵ሶ㔚䈏䇮േ㔚ᵹଏ⛎䈚䈐䈇㔚 VCC(BIAS) = 11.0V 䈮ૐਅ䈜䉎䈫䇮䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻䈏േ 䈚䉁䈜䇯 䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻䈲䇮VCC ┵ሶ㔚䈏 VCC(BIAS) 䈮䈭䉎䈫േ࿁〝䈏േ㔚ᵹ䉕ଏ⛎䈚䇮VCC ┵ሶ㔚䈱ૐ ਅ䉕ᛥ䈋䇮VCC ┵ሶ㔚䈏䈾䈿৻ቯ㔚䈮䈭䉎䉋䈉䈮േ䈚䉁䈜䇯㩷 䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻䈮䉋䉍䇮C2 䈲ૐ䈇ኈ㊂䉕↪䈪䈐䉎䈢䉄䇮㔚Ḯᛩᤨ䈱േᤨ㑆䉕⍴䈒䈪䈐䉁䈜䇯䉁䈢ജ ㆊ㔚ᤨ䈮 VCC ┵ሶ㔚䈱䈏ᣧ䈒䈭䉎䈢䉄䇮ㆊ㔚⼔ᯏ⢻䈱ᔕ╵ᤨ㑆䉅⍴❗䈪䈐䉁䈜䇯 䈭䈍䇮േਇ⦟䈏䈐䈭䈇䉋䈉䇮ᦨ⚳⊛䈮ታേ䈪⏕䈍䉋䈶⺞ᢛ䈏ᔅⷐ䈪䈜䇯 VCC┵ሶ㔚 ICേ㐿ᆎ േᚑഞ ⸳ቯ㔚 VCC(ON)= 15.1V VCC(BIAS)= 11.0V ജ㔚┙䈤䈏䉍 䊋䉟䉝䉴䉝䉲䉴䊃ᦼ㑆 VCC(OFF)= 9.4V േਇ⦟ᤨ ᤨ㑆 ࿑ 8-5㩷 േᤨ䈱 VCC ┵ሶ㔚 Copy Right: SANKEN ELECTRIC CO., LTD. Page.11 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.1.4 䉸䊐䊃䉴䉺䊷䊃ᯏ⢻ ࿑ 8-6 䈮േᤨ䈱േᵄᒻ䉕␜䈚䉁䈜䇯㩷 䉸䊐䊃䉴䉺䊷䊃䈱േᦼ㑆䈲䇮COMP ┵ሶ㔚䈏ᓮਅ㒢㔚 VCOMP(MIN)= 0.55V 䈮㆐䈚䈩䈎䉌䇮ജ㔚ᵹ䉕ቯ㔚ᵹᓮ䈜䉎䉁䈪䈱ᦼ㑆䈪䇮ᓢ䇱䈮ജ㔚ജ䈏Ⴧട䈚䉁䈜䇯 㔚Ḯേᤨ䈲䇮ᰴ䈱⏕䈍䉋䈶䈠䈱⺞ᢛ䈏ᔅⷐ䈪䈜䇯 · VCC ┵ሶ㔚䈏䇮േᱛ㔚 VCC(OFF)䉁䈪ૐਅ䈚䈩䈇䈭䈇䈖䈫 · ㆊ⽶⩄⼔ᯏ⢻䋨OLP䋩䈏േ䈜䉎೨䈮䇮ജ㔚ᵹ䈏⸳ቯ㔚ᵹ䉁䈪┙䈤䈏䈦䈩䈇䉎䈖䈫 䋨䈖䈱䈫䈐䇮COMP ┵ሶ㔚䈏 OLP 䈚䈐䈇㔚 VCOMP(OLP)= 4.5V ᧂḩ䈪䈅䉎䈖䈫䋩 8.1.5 േᤨ䈱േ䊝䊷䊄 IC േ㐿ᆎᓟ䇮COMP ┵ሶ㔚䈏 VCOMP(MIN)= 0.55V 䈮䈭䉎䈫䇮PWM േ䈪䉴䉟䉾䉼䊮䉫േ䉕㐿ᆎ䈚䉁䈜䇯 PWM േᵄᢙ fOSC 䈲䇮72kHz㩷 䋨LC5556LD 䈲 60kHz䋩䈪䈜䇯 ജ㔚䈏┙䈤䈏䉎䈫䈫䉅䈮䇮OCP ┵ሶ䈱䊒䊤䉴㔚䈏Ⴧട䈚䇮ᡆૃᝄേ䈚䈐䈇㔚 1 VBD(TH1)= 0.24V 䈮 ㆐䈜䉎䈫ᡆૃᝄേ䋨QR䋩䈮ಾ䉍ᦧ䉒䉍䉁䈜䇯࿑ 8-7 䈮䇮PWM േ䈎䉌ᡆૃᝄേ䋨QR䋩䊝䊷䊄䈮ಾ䉍ᦧ䉒䉎䈫䈐 䋨࿑ 8-6 䈱 A ὐ䋩䈱 OCP ┵ሶ㔚ᄢᵄᒻ䉕␜䈚䉁䈜䇯 䉸䊐䊃䉴䉺䊷䊃ᦼ㑆 COMP┵ሶ㔚 ICേ㐿ᆎ VCOMP(MIN)= 0.55V S/GND VCC┵ሶ㔚 VCC(BIAS)= 11.0V S/GND ቯ㔚ᵹᓮ ജ㔚ᵹIOUT (LED⽶⩄㔚ᵹ䋩 ⸳ቯ㔚ᵹ GND(IOUT) PWMേ ᡆૃᝄേ䋨QR䋩 䊄䊧䉟䊮㔚ᵹID S/GND A ᤨ㑆 ࿑ 8-6㩷 㔚Ḯേᤨ䈱േ䊝䊷䊄 ᡆૃᝄାภVBD PWMേ ᡆૃᝄേ䋨QR䋩 VBD(TH1) S/GND 䊄䊧䉟䊮㔚ᵹID GND䋨ID䋩 ᤨ㑆 ࿑ 8-7㩷 OCP ┵ሶ㔚ᄢᵄᒻ㩿㪘 ὐᄢ㪀 Copy Right: SANKEN ELECTRIC CO., LTD. Page.12 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 LC5550LD 8.2 䉥䊮ᓮേ ࿑ 8-8 䈮 LC5550LD 䈱 COMP ┵ሶㄝ࿁〝䇮࿑ 8-9 䈮䉥䊮ᓮᣇᴺ䉕␜䈚䉁䈜䇯 ജ⽶⩄䈮ᔕ䈛䈩䉥䊮䉕ᓮ䈜䉎㔚ᓮ䈫ᐔဋ㔚 ᵹᓮ䈮䉋䉍ജᓮ䉕ⴕ䈇䉁䈜䇯 COMP 4 C4 OCP D7 3 ࿑ 8-9 䈮␜䈜䉋䈉䈮䇮LC5550LD 䈱ᐔဋ㔚ᵹᓮ䈲䇮 ቯ㔚ᵹᬌᛶ᛫䈱㔚㒠ਅ䈫ౝㇱ䉣䊤䊷䉝䊮䊒ၮḰ㔚 VSEN(TH)= −0.2V 䉕 OTA ࿁〝䈪Ყセ䈚䇮COMP ┵ሶ䈪 ᐔဋൻ䈚䈢㔚䉕䉍䉁䈜䇯 䈖䈱ᐔဋൻ䈚䈢 COMP ┵ሶ㔚䉕䇮FB 䉮䊮䊌䊧䊷䉺䈪 IC ౝㇱ⊒ᝄེ䋨OSC䋩ജ䈫Ყセ䈚䇮䉥䊮ᓮ䉕ⴕ䈇䉁 䈜䇯䈖䈱 IC ౝㇱ⊒ᝄེ䋨OSC䋩䈫䈲䇮PWM േᵄᢙ䇮ᡆ ૃᝄ⊒ᝄ䇮ᦨᄢ䉥䊮ᤨ㑆㒢䈭䈬䉕ⴕ䈉⊒ᝄ࿁〝䈪 䈜䇯 COMP ┵ሶ䈮ធ⛯䈜䉎 C4 ኈ㊂䈱ផᅑ୯䈲 1.0䌾4.7µF ⒟ᐲ䈪䈜䇯R2 ᛶ᛫୯䈱⋡䈲䇮100䌾220Ω 䈮䈭䉍䉁䈜䇯 R5 S/GND ROCP 1 ࿑ 8-8㩷 㩷 COMP ┵ሶㄝ࿁〝 LC5550LD COMP┵ሶ㔚 OSC 㪄 ISENSE ┵ሶ䈮ធ⛯䈜䉎 R2䇮C5 䈲䊐䉞䊦䉺䉕᭴ᚑ䈚䉁 䈜䇯R2 䈱ᛶ᛫୯䈏ᄢ䈐䈇႐ว䈮䈲䇮ISENSE ┵ሶ䈱ᵹ 㔚ᵹ䋨䈍䉋䈠䋭40µA䋩䈮䉋䈦䈩 LED 㔚ᵹ♖ᐲ䈮ᓇ㗀䈏䈪 䉁䈜䈱䈪 R2 ᛶ᛫୯䈱⋡䈲䌾220Ω䇮C5 ኈ㊂䈱⋡䈲䌾 0.1µF 䈮䈭䉍䉁䈜䇯 4 FB 㪂 COMP C4 ISENSE 6 㪂 OTA R2 C5 㪄 S/GND ജ㔚ᵹ䈱ቯ㔚ᵹᓮ䈲䇮⽶⩄䈮ᔕ䈛䈩ᰴ䈱䉋䈉䈮ᓮ 䈚䉁䈜䇯 · LED ⽶⩄㔚ᵹ䈏⸳ቯ㔚ᵹ䉋䉍ᷫዋ䈚䈢႐ว ⽶⩄㔚ᵹ䈏⸳ቯ㔚ᵹ䉋䉍ᷫዋ䈜䉎䈫䇮ISENSE ┵ሶ㔚䈏 ૐਅ䈚䇮OTA ࿁〝ജ䉕ᐔဋൻ䈚䈢 COMP ┵ሶ㔚䈏 㜞䈒䈭䉍䉁䈜䇯䈖䈱䈢䉄䉥䊮䈏ᐢ䈒䈭䉍䇮ജ㔚ᵹ䈏Ⴧ ട䈚䉁䈜䇯 · LED ⽶⩄㔚ᵹ䈏⸳ቯ㔚ᵹ䉋䉍Ⴧട䈚䈢႐ว ⽶⩄㔚ᵹ䈏⸳ቯ㔚ᵹ䉋䉍Ⴧട䈜䉎䈫䇮⸥䈫ㅒ䈱േ䈮 䈭䉍䇮ᐔဋൻ䈚䈢 COMP ┵ሶ㔚䈏ૐ䈒䈭䉍䉁䈜䇯䈖䈱䈢 䉄䉥䊮䈏⁜䈒䈭䉍䇮ജ㔚ᵹ䈏ᷫዋ䈚䉁䈜䇯 1 ቯ㔚ᵹᬌᛶ᛫ 㪄 OSC 㪂 COMP ┵ሶ㔚 䉭䊷䊃ON 䊄䊧䉟䊮㔚ᵹ ࿑ 8-9㩷 䉥䊮ᓮ ࿑ 8-10 䈮䇮ᐔဋജ㔚ᵹᵄᒻ䉕␜䈚䉁䈜䇯 ᐔဋൻ䈚䈢 COMP ┵ሶ㔚䈲৻ቯ䈮䈭䉍䇮EIN 㔚䋨࿑ 8-1 䈱 C1 㔚䋩䈮ว䉒䈞䈩 Duty 䉕ᓮ䈜䉎䈢䉄䇮ᐔ ဋജ㔚ᵹ䈏ᱜᒏᵄ䈮䈭䉍䉁䈜䇯䈖䉏䈮䉋䉍䇮㜞ജ₸䉕ታ䈪䈐䉁䈜䇯 㪚㪦㪤㪧┵ሶ㔚 S/GND EINᵄᒻ 䊄䊧䉟䊮㔚ᵹᵄᒻᄢ ᐔဋജ㔚ᵹ ࿑ 8-10㩷 ᐔဋജ㔚ᵹᵄᒻ Copy Right: SANKEN ELECTRIC CO., LTD. Page.13 LED LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.3 PWM േ ࿑ 8-11 䈮 PWM േᤨ䈱ᵄᒻ䉕䇮࿑ 8-12 䈮⽶⩄㔚 ᵹ⚻〝䉕␜䈚䉁䈜䇯࿑ 8-11 䈱㽲䌾㽵䈱䊘䉟䊮䊃䈱ౝㇱ PWM 㔚ᵹᓮ䈲䇮એਅ䈮䈭䉍䉁䈜䇯 㽲 㽳 㽴 㽵 ION IOFF ION IOFF ON OFF LED㔚ᵹ ILED 㽲PWM 䉥䊮ᦼ㑆 േᤨ䇮䈍䉋䈶⸳ቯ䈚䈢ജ MOSFET 䈱㔚ᵹ୯䈮 ㆐䈚䈩䈇䈭䈇⁁ᘒ䈪䈲䇮ജ MOSFET 䈏䉥䊮䈫䈭 䉍䇮࿑ 8-12 䈱 ION 䈪␜䈜⚻〝䈪㔚ᵹ䈏ᵹ䉏䉁䈜䇯 VISENSE MOSFET 㽳䉺䊷䊮䉥䊐 LED 㔚ᵹ䈲 R3䇮R4 䈪 ISENSE ┵ሶ㔚 VISENSE 䈫䈚 䈩ᬌ䈚䉁䈜䇯“8.2 䉥䊮ᓮേ“䈮␜䈚䈢䉋䈉䈮 VISENSE 㔚 䈎 䉌 MOSFET 䈱 䉥 䊮 䉕 ᓮ 䈚 䇮 MOSFET 䉕䉺䊷䊮䉥䊐䈚䉁䈜䇯 㽴PWM 䉥䊐ᦼ㑆 ജ MOSFET 䈏䉺䊷䊮䉥䊐䈜䉎䈫䇮䉼䊢䊷䉪䉮䉟䊦 L1 䈮ㅒ㔚ജ䈏⊒↢䈚䉁䈜䇯䈖䉏䈮䉋䉍䇮ㆶᵹ䉻䉟 䉥䊷䊄 D5 䈲㗅ᣇะ䈮䊋䉟䉝䉴䈘䉏䉺䊷䊮䉥䊮䈚䉁䈜䇯 䈖䈱䉋䈉䈮䇮PWM 䉥䊮ᦼ㑆䈮䉼䊢䊷䉪䉮䉟䊦 L1 䈮⫾䈋 䈢䉣䊈䊦䉩䈲䇮࿑ 8-12 䈱 IOFF 䈪␜䈜⚻〝䉕ㅢ䈦䈩࿁ ↢䈚䉁䈜䇯 1/fosc Copy Right: SANKEN ELECTRIC CO., LTD. Page.14 1/fosc ࿑ 8-11㩷 㒠䉮䊮䊋䊷䉺䈱േᵄᒻ LC5550 Control ISENSE VISENSE R3 S/GND D/ST L1 R4 MOSFET D5 㽵䉺䊷䊮䉥䊮 PWM േᦼ (t=1/fOSC) ⚻ㆊᓟ䇮ജ MOSFET 䈏ౣᐲ䉺䊷䊮䉥䊮䈚䇮㽲䈱 PWM 䉥䊮ᦼ㑆䈏㐿ᆎ䈚䉁 䈜䇯 OFF ON IOFF ION ࿑ 8-12 㒠䉮䊮䊋䊷䉺䈱㔚ᵹ⚻〝 VLED LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.4 ᡆૃᝄേ ࿑ 8-13 䈮ᡆૃᝄᣇᑼ䈱࿁〝࿑䉕␜䈚䉁䈜䇯࿑䈱䊋䉾䉪䉮䊮䊋䊷䉺ᣇᑼ䈲䊌䊪䊷MOSFET 䈏䉺䊷䊮䉥䊐䈚䈢䈫䈐 䈮䉼䊢䊷䉪䉮䉟䊦 L1 䈮⫾䈋䈢䉣䊈䊦䉩䉕ജ䈮ଏ⛎䈜䉎ᣇᑼ䈪䈜䇯䊄䊧䉟䊮䈫䉸䊷䉴㑆䈱㔚 VDS 䈲䇮L1 䈱䉟䊮䉻䉪䉺䊮 䉴 L 䈫䊄䊧䉟䊮䈫䉸䊷䉴㑆䈱䉮䊮䊂䊮䉰 CV 䈪䉁䉎ᵄᢙ䈪⥄↱ᝄേ䈚䉁䈜 ᡆૃᝄേ䈫䈲䇮䈖䈱⥄↱ᝄേ䈱ᦼ㑆䈮䇮VDS 㔚ᵄᒻ䈱䊗䊃䊛ὐ䈪䊌䊪䊷MOSFET 䉕䉺䊷䊮䉥䊮䈜䉎േ 䈪䈜䋨䊗䊃䊛䉥䊮േ䋩䇯࿑ 8-14 䈮䇮ℂᗐ⊛䈭䊗䊃䊛䉥䊮േᤨ䈱 VDS 㔚ᵄᒻ䉕␜䈚䉁䈜䇯䊗䊃䊛䉥䊮േ䈮䉋䉍䇮 䉴䉟䉾䉼䊮䉫៊ᄬ䈍䉋䈶䉴䉟䉾䉼䊮䉫䊉䉟䉵䉕ૐᷫ䈚䇮㜞ല₸䇮ૐ䊉䉟䉵䈏ታ䈪䈐䉁䈜䇯 D6 R1 LC5550LD D7 D8 R7 OCP/BD 3 VCC C6 2 R5 C8 C4 D/ST S/GND 8 1 R3 R4 L1 R6 D5 CV ࿑ 8-13㩷 OCP/BD ┵ሶㄝ࿁〝࿑ ⥄↱ᝄേ䈱ඨᦼ䇭tONDLY t ONDLY ѳ p L´CV VDS 0 䊗䊃䊛ὐ IOFF 0 ID 0 tON ࿑ 8-14㩷 ℂᗐ⊛䈭䊗䊃䊛䉥䊮േ (VDS 㔚ᵄᒻ䈱䊗䊃䊛ὐ䈪䉺䊷䊮䉥䊮) Copy Right: SANKEN ELECTRIC CO., LTD. Page.15 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 䊌䊪䊷MOSFET 䈏䉥䊐䈱ᦼ㑆䈲䇮ജ㔚䈏ㆃᑧ࿁〝䋨D7, D8, R7, C8䋩䉕⚻↱䈚䈩䇮OCP/BD ┵ሶ㔚䈮䊒䊤 䉴㔚䉕ଏ⛎䈚䉁䈜䋨ᡆૃᝄାภ VBD䋩䇯 䊌䊪䊷MOSFET 䈱䉺䊷䊮䉥䊐ᤨ䈮䇮VBD 䈏ᡆૃᝄേ䈚䈐䈇㔚 1 VBD(TH1)= 0.24V એ䈮䈭䉎䈫䇮䊌 䊪䊷MOSFET 䈲䉥䊐ᦼ㑆䉕⛮⛯䈚䉁䈜䇯䈠䈱ᓟ䇮VBD 䈏ૐਅ䈚䇮VBD 䈏ᡆૃᝄേ䈚䈐䈇㔚 2 VBD(TH2)= 0.16V 䈮䈭䉎䈫䇮䊌䊪䊷MOSFET 䈏䉺䊷䊮䉥䊮䈚䉁䈜䇯VBD 䈏 VBD(TH2)䈮㆐䈜䉎䈫䇮IC ౝㇱ䈪⥄േ⊛䈮䇮ᡆૃᝄേ䈚䈐䈇 㔚䉕 VBD(TH1)䈮䈕䉎䈢䉄䇮OCP/BD ┵ሶ䈱䊉䉟䉵䈮䉋䉎⺋േ䉕㒐ᱛ䈪䈐䉁䈜䇯 ࿑ 8-15 䈮ᡆૃᝄ㔚ᵄᒻ䉕␜䈚䉁䈜䇯 ㆃᑧᤨ㑆 tONDLY 䈲䇮ㆃᑧ࿁〝䈱ቯᢙ䈪䉁䉎䈢䉄䇮VDS 㔚ᵄᒻ䈱䊗䊃䊛䈪䉺䊷䊮䉥䊮䈜䉎䉋䈉䈮䇮ቯᢙ䉕⺞ᢛ䈚䉁 䈜䇯ᡆૃᝄାภ䈱䊏䊷䉪㔚 VBD(PK)䈫ലᦼ㑆 tQR 䈲䇮㔚Ḯ᭽䈱ജᄌേ▸࿐ౝ䈮䈍䈇䈩䇮R5䇮R7 䈱䊋䊤 䉿䉨䉕⠨ᘦ䈚䇮ᡆૃᝄାภ䈱䊏䊷䉪㔚 VBD(PK)= 1.5䌾2.0V䇮ᡆૃᝄାภലᦼ㑆 tQR ≥ 1.2µs 䈫䈭䉎䉋䈉䈮⺞ᢛ 䈚䉁䈜䇯 · R5 䈱ផᅑ୯䋺100䌾330Ω · C6 䈱ផᅑ୯䋺100pF䌾470pF · R7 䈱⸳ቯ R7 䈲䇮㔚Ḯ᭽䈱ജᄌേ▸࿐䈮䈍䈔䉎 VCC ┵ሶ㔚䈏ᦨ䉅ਅ㒢䈮䈭䉎᧦ઙ䈪䇮VBD(PK) ≥ VBD(TH1)䈫䈭䉎 䉋 䈉 䈮 ⺞ ᢛ 䈚 䉁 䈜 䇯 ㅢ Ᏹ േ ᤨ 䈲 䇮 VCC ┵ ሶ 㔚 䈏 ᦨ ᄢ 䈮 䈭 䉎 ᧦ ઙ 䈪 䇮 VBD(PK)< OVP േ 㔚 VBD(OVP)= 2.6V ᧂḩ䈫䈭䉎䉋䈉䇮⏕䈍䉋䈶⺞ᢛ䈏ᔅⷐ䈪䈜䇯 R7 䉕᳞䉄䉎▚ᑼ䈲䇮ROCP<< R5 䉋䉍 ROCP 䈱ᓇ㗀䈏䈭䈇䈫䈚䈢႐ว䇮ᰴᑼ(3)䈮䈭䉍䉁䈜䇯 R7 = (V CC ) - VBD ( PK ) - 2VF ´ R 5 㩷 VB ---------- (3) D ( P K ) 㩷㩷 䈫䈚䈩㔚Ḯ᭽▸࿐䈱 VCC ┵ሶ㔚ਅ㒢୯䉕 16V䇮R5= 220Ω䇮VBD(PK)= 1.5V䇮D7 䈫 D8 䈱㗅ᣇะ㔚㒠 ਅ VF= 0.8V 䈫䈚䈢႐ว䇮R7㻍1.89kΩ 䈫䈭䉍䉁䈜䇯䈚䈢䈏䈦䈩䇮E ♽䈱ᛶ᛫䈪䈲 1.8kΩ 䈮䈭䉍䉁䈜䇯 ലᦼ㑆 t QR 䈏⏕䈪䈐䈭䈇႐ว䈲䇮એਅ䈱⺞ᢛ䉕ⴕ䈇䉁䈜䇯 䊶R5 䈱୯䉕ᄢ䈐䈒䈜䉎 䊶R7 䈱୯䉕ዊ䈘䈒䈚䈩 VBD(PK)䉕㜞䈒䈜䉎 䊶㔚ᝄ䉮䊮䊂䊮䉰 CV 䈱ኈ㊂䉕Ⴧ䉇䈚䈩⥄↱ᝄേᦼ䉕㐳䈒䈜䉎 䋨CV 䈱ኈ㊂䉕Ⴧ䉇䈜႐ว䇮䊌䊪䊷MOSFET 䈱䉺䊷䊮䉥䊮ᤨ䈱䉴䉟䉾䉼䊮䉫៊ᄬ䈏Ⴧട䈜䉎䈢䉄䇮IC 䈱 ⊒ᾲ䈱⏕䈏ᔅⷐ䈪䈜䋩 · D7䇮D8 䊥䉦䊋䊥䊷ᤨ㑆䈏⍴䈒䇮⚿วኈ㊂䈏ዊ䈘䈇䉅䈱䉕↪䈚䈩䈒䈣䈘䈇䇯 · C8 䈱⸳ቯ 䊌䊪䊷MOSFET 䉕䊗䊃䊛䉥䊮䈮䈘䈞䉎ㆃᑧᤨ㑆 tONDLY 䈱⺞ᢛ䈲䇮C8 䈪ⴕ䈇䉁䈜䇯C8 䈲䇮㔚Ḯജ㔚㒢䇮 ജ⽶⩄ᦨᄢ䈱᧦ઙ䈪䇮MOSFET 䈱䊄䊧䉟䊮䈫䉸䊷䉴㑆䈱㔚 VDS䇮ᡆૃᝄାภ VBD䇮䊄䊧䉟䊮㔚ᵹ ID 䈱ታ ᵄᒻ䉕᷹ⷰ䈚䇮ℂᗐ⊛䈭䊗䊃䊛䉥䊮䋨䉺䊷䊮䉥䊮䈏䊗䊃䊛ὐ䈫৻⥌䋩䈮䈭䉎䉋䈉䇮C8 䉕Ⴧᷫ䈘䈞䈩⺞ᢛ䈚䉁䈜䇯 C8 䈱ೋᦼቯᢙ䈲䇮1000pF ⒟ᐲ䈏⋡䈮䈭䉍䉁䈜䇯 ᡆૃᝄ㔚 VBD VBD(PK)= 1.5䌾2.0Vផᅑ 䋨2.6Vએਅ䋩 VBD(TH1)= 0.34V(MAX) VBD(TH2)= 0.21V(MAX) tQR ≥ 1.2µs ࿑ 8-15 ᡆૃᝄାภ䈱ലᦼ㑆 Copy Right: SANKEN ELECTRIC CO., LTD. Page.16 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.5 ㆊ㔚⼔ᯏ⢻ 䋨OVP䋩 ㆊ㔚⼔ᯏ⢻䋨OVP䋩䈲䇮VCC ┵ሶ䇮OCP/BD ┵ሶ䈱 2 ⒳㘃䈅䉍䉁䈜䇯OVP 䈏േ䈜䉎䈫䇮䊤䉾䉼䊝䊷䊄䈪䉴 䉟䉾䉼䊮䉫േ䉕ᱛ䈚䉁䈜䇯䉴䉟䉾䉼䊮䉫േ䈏ᱛ䈜䉎䈫䇮VCC ┵ሶ㔚䈲ਅ㒠䈚ᆎ䉄䇮VCC(BIAS)= 11.0V 䉁䈪 ૐਅ䈜䉎䈫䇮䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻䈏േ䈚䉁䈜䇯䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻䈏േ䈜䉎䈫䇮േ㔚ᵹ䉕 VCC ┵ሶ䈮ଏ⛎ 䈚䈩䇮േᱛ㔚Ḯ㔚 VCC(OFF)= 9.4V 䉁䈪ૐਅ䈜䉎䈖䈫䉕㒐䈑䇮䊤䉾䉼⁁ᘒ䉕ᜬ䈚䉁䈜䇯 䊤䉾䉼⁁ᘒ䈱⸃㒰䈲䇮㔚Ḯ㔚䉕䉥䊐䈚䇮VCC ┵ሶ㔚䉕 VCC(OFF)એਅ䈮ਅ䈕䉎䈖䈫䈪ⴕ䈇䉁䈜䇯 8.6 VCC ┵ሶㆊ㔚⼔ᯏ⢻䋨VCC_OVP䋩 ࿑ 8-16 䈮 VCC_OVP ᯏ⢻േᤨ䈱ᵄᒻ䉕␜䈚䉁䈜䇯 VCC ┵ሶ䈮䇮VCC ┵ሶ OVP 䈚䈐䈇㔚 VCC(OVP)= 31.5V એ䈱㔚䉕ශട䈜䉎䈫䇮VCC_OVP ᯏ⢻䈏േ䈚䇮䊤䉾䉼 䊝 䊷 䊄 䈪 䉴 䉟 䉾 䉼 䊮 䉫 േ 䉕 ᱛ 䈚 䉁 䈜 䇯 LED ⽶ ⩄ 䉥䊷䊒䊮ᤨ䈮䈲ജ䈱䈫䈫䉅䈮 VCC ┵ሶ㔚䉅 䈜䉎䈢䉄䇮VCC_OVP ᯏ⢻䈮䉋䉎⼔䈏น⢻䈪䈜䇯 ᔕ ↪ ࿁ 〝 䋨 ࿑ 5-1 䇮 ࿑ 5-2 䋩 䈱 㔚 Ḯ ᭴ ᚑ 䈱 ႐ ว 䇮 VCC_OVP ᯏ ⢻ േ ᤨ 䈱 ജ 㔚 VOUT(OVP) 䈲 䈍 䉋 䈠 31.5V 䈫䈭䉍䉁䈜䇯ജ㔚䈏 VCC േ▸࿐䉋䉍㜞䈇႐ว䇮 ࿑ 8-17 䈱䉋䈉䈮䉿䉢䊅䊷䉻䉟䉥䊷䊄 D9 䉕ㅊട䈚䉁䈜䇯䈖䈱 ႐ว VOUT(OVP)䈲䈍䉋䈠 31.5V + VZENOR 䈫䈭䉍䉁䈜䇯 Vcc 䊤䉾䉼 VCC(OVP)= 31.5V 㔚Ḯ䉥䊐 VCC(BIAS)= 11.0V 䊤䉾䉼⸃㒰 VCC(OFF)= 9.4V Vo VO(MAX) = 0.7mA × R6 VOUT(OVP) COMP┵ሶ㔚 VCC_OVP ᯏ⢻േᤨ䈲䇮IC 䈱േ࿁〝䈎䉌㔚ᵹ䉕ଏ ⛎䈜䉎䈖䈫䈪 VCC ┵ሶ㔚䉕⛽ᜬ䈚䇮䊤䉾䉼േ䉕⛮⛯䈚 䉁䈜䇯VCC_OVP ᯏ⢻䈏േ䈜䉎䈫䇮േ㔚ᵹ䈏ജ䈱㔚 ⸃䉮䊮䊂䊮䉰䉕ల㔚䈚䇮ജ㔚䈏䈚 䉁䈜䇯IC 䈱 D/ST 䈫 S/GND ┵ሶ㑆㔚䈏 IC േ࿁〝േ㔚 VSTARTUP એਅ䈮䈭䉎䈫䇮VCC ┵ሶ㔚䈏ૐਅ䈚䊤䉾䉼േ 䉕⸃㒰䈚䉁䈜䇯 䊤䉾䉼േ䉕⛮⛯䈜䉎䈢䉄䈮䈲䇮ജ㔚⸃䉮䊮䊂䊮䉰䈫 ਗ䈮ᛶ᛫ (࿑ 5-1 䈶࿑ 5-2 䈱 R6) 䉕ᝌ䈚䇮േ࿁ 〝േ㔚 VSTARTUP 䉕⏕䈜䉎ᔅⷐ䈏䈅䉍䉁䈜䇯䊤䉾䉼േ ᤨ䈱ᦨᄢജ㔚䈱⋡䈲 VO(MAX) 䌾 0.7mA × R6 䈪 䈜䇯 䊤䉾䉼ᜬ䇮ᦨᄢജ㔚䇮䈍䉋䈶ㅢᏱേᤨ䈱 LED 㔚ᵹ䈻䈱ᓇ㗀䉕⠨ᘦ䈚䈭䈏䉌 R6 䉕ቯ䈚䈩䈒䈣䈘䈇䇯 䊤䉾䉼⁁ᘒ䈱⸃㒰䈲䇮㔚Ḯ㔚䉕䉥䊐䈚䇮VCC ┵ሶ㔚 䉕 VCC(OFF)એਅ䈮ਅ䈕䉎䈖䈫䈪ⴕ䈇䉁䈜䇯 VCOMP(MIN)= 0.55V 䊄䊧䉟䊮㔚ᵹ䇭ID ࿑ 8-16 VCC_OVP ᯏ⢻േᤨ䈱ᵄᒻ R1 D9 D6 LC5550LD D7 D8 R7 OCP/BD 3 VCC C6 2 R5 C8 C4 D/ST S/GND 8 1 R3 CV R4 L1 D5 ࿑ 8-17 ജ㔚䈏 VCC േ▸࿐䉋䉍ᄢ䈐䈇႐ว䈱࿁〝 Copy Right: SANKEN ELECTRIC CO., LTD. Page.17 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.7 OCP ┵ሶㆊ㔚⼔ᯏ⢻䋨OCP_OVP䋩 ࿑ 8-18 䈮 OCP_OVP ࿁〝䉕␜䈚䉁䈜䇯ᡆૃᝄᣇᑼ࿁〝䈮䈍䈇䈩 OCP/BD ┵ሶ䈫 VCC 㑆䈮䉻䉟䉥䊷䊄 D10 䉕ㅊട䈜䉎䈖䈫䈪 OCP_OVP ᯏ⢻䉕↪䈪䈐䉁䈜䇯 ࿑ 8-19 䈮 OCP_OVP ᯏ⢻േᤨ䈱ᵄᒻ䉕␜䈚䉁䈜䇯OCP ┵ሶ䈮䇮OCP ┵ሶ OVP 䈚䈐䈇㔚 VBD(OVP)= 2.6V એ 䋨⛘ኻᦨᄢቯᩰ 5V ᧂḩ䋩䈱㔚䉕ශട䈜䉎䈫䇮OCP_OVP ᯏ⢻䈏േ䈚䇮䊤䉾䉼䊝䊷䊄䈪䉴䉟䉾䉼䊮䉫䉕ᱛ䈚䉁 䈜䇯 䊤䉾䉼⁁ᘒ䈱⸃㒰䈲䇮㔚Ḯ㔚䉕䉥䊐䈚䇮VCC ┵ሶ㔚䉕 VCC(OFF)એਅ䈮ਅ䈕䉎䈖䈫䈪ⴕ䈇䉁䈜䇯 D6 R1 D10 LC5550LD D7 D8 R7 OCP/BD 3 VCC C6 2 C8 R5 C4 D/ST S/GND 8 1 R4 R3 L1 D5 CV ࿑ 8-18 OCP_OVP ࿁〝 VCC┵ሶ㔚 㔚Ḯ䉥䊐 䊤䉾䉼⸃㒰 VCC(BIAS)= 11.0V VCC(OFF)= 9.4V OCP┵ሶ㔚 䊤䉾䉼 VBD(OVP)= 2.6V 䊄䊧䉟䊮㔚ᵹ䇭ID ࿑ 8-19 OCP_OVP ᯏ⢻േᤨ䈱ᵄᒻ Copy Right: SANKEN ELECTRIC CO., LTD. Page.18 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.8 ㆊ⽶⩄⼔ᯏ⢻ 䋨OLP䋩 ㆊ⽶⩄⼔䋨OLP䋩⁁ᘒ䈫䈲䇮⽶ㆊ㔚ᵹ䈏Ⴧᄢ䈚䇮OCP േ䈮䉋䉍䊄䊧䉟䊮㔚ᵹ䈱䊏䊷䉪୯䉕㒢䈚䈩䈇䉎⁁ᘒ䈪 䈜䇯 COMP ┵ሶㄝ࿁〝࿑䉕࿑ 8-20 䈮䇮ㆊ⽶⩄⼔ᯏ⢻䋨OLP䋩䈏േ䈚䈢䈫䈐䈱ฦㇱ䈱ᵄᒻ䉕࿑ 8-21 䈮␜䈚䉁 䈜䇯ㆊ⽶⩄⁁ᘒ䈮䈭䉎䈫䇮ജ㔚䈏ૐਅ䈜䉎䈢䉄䇮VCC ┵ሶ㔚䈏ૐਅ䈚䉁䈜䇯VCC ┵ሶ㔚䈏േ㔚ᵹଏ⛎ 䈚䈐䈇㔚 VCC(BIAS)= 11.0V 䈮䈭䉎䈫䇮䊋䉟䉝䉴䉝䉲䉴䊃ᯏ⢻䈏േ䈚䇮VCC ┵ሶ㔚䈱ૐਅ䉕ᛥ䈋䉁䈜䇯 䉁䈢䇮หᤨ䈮 ISENSE ┵ሶ㔚䉅ૐਅ䈚䉁䈜䇯ISENSE ┵ሶ㔚䈏ౝㇱ䈱䉣䊤䊷䉝䊮䊒ၮḰ㔚 VSEN(TH)= −0.2V 䉁䈪ૐਅ䈜䉎䈫䇮IC ౝㇱ䈱 OTA ࿁〝ജ䈏䈭䈒䈭䉎䈢䉄䇮COMP ┵ሶౝㇱ䈱ቯ㔚ᵹḮ䈪 COMP ┵ሶ䈮ធ⛯䈚䈢 C4 䉕ల㔚䈚䉁䈜䇯COMP ┵ሶ㔚䈏 OLP 䈚䈐䈇㔚 VCOMP(OLP)= 4.5V 䈮㆐䈜䉎䈫䇮8.5 ㆊ㔚⼔ᯏ⢻䋨OVP䋩ห᭽䇮 䊤䉾䉼䊝䊷䊄䈪䉴䉟䉾䉼䊮䉫േ䉕ᱛ䈚䉁䈜䇯 䊤䉾䉼⁁ᘒ䈱⸃㒰䈲䇮㔚Ḯ㔚䉕䉥䊐䈚䇮VCC ┵ሶ㔚䉕 VCC(OFF)એਅ䈮ਅ䈕䉎䈖䈫䈪ⴕ䈇䉁䈜䇯 LC5550LD 7V Reg 3 6 D/ST 8 OTA COMP C4 ISEN 1 S/GND R3 R4 L1 D5 ࿑ 8-20 COMP ┵ሶㄝ࿁〝࿑ VCC┵ሶ㔚 㔚Ḯ䉥䊐 䊤䉾䉼⸃㒰 VCC(BIAS)1= 11.0V COMP┵ሶ㔚 VCC(OFF)= 9.4V 䊤䉾䉼 VCOMP(OLP)= 4.5V 䊄䊧䉟䊮㔚ᵹ䇭ID ࿑ 8-21 OLP േᤨ䈱ᵄᒻ Copy Right: SANKEN ELECTRIC CO., LTD. Page.19 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.9 ㆊ㔚ᵹ⼔ᯏ⢻䋨OCP䋩 ㆊ㔚ᵹ⼔ᯏ⢻䋨OCP䋩䈲䇮䊌䊪䊷MOSFET 䈱䊄䊧 䉟䊮㔚ᵹ䊏䊷䉪୯䉕䇮䊌䊦䉴䊶䊋䉟䊶䊌䊦䉴ᣇᑼ䈪ᬌ 䈚䇮㔚ജ㒢䈚䉁䈜䇯 䊌䊪䊷MOSFET 䈱䊄䊧䉟䊮㔚ᵹ䈲䇮࿑ 8-22 䈱䉋䈉䈮 OCP/BD ┵ሶ䈫 S/GND ┵ሶ㑆䈱㔚ᵹᬌᛶ᛫ R3 䈪 ᬌ䈚䉁䈜䇯䈖䈱ᬌ㔚 V R3 䉕䇮R5 䉕䈚䈩䇮 OCP/BD ┵ሶ䈮ജ䈚䉁䈜䇯V R3 䈏ᰴᑼ䋨5䋩䈮㆐䈜䉎 䈫䇮䊌䊪䊷MOSFET 䈏䉺䊷䊮䉥䊐䈚䉁䈜䇯 ( LC5550LD OCP/BD 3 -0.6V Reg LOGIC DRIVE R5 C6 D/ST 8 1 S/GND R3 ) VR 3 = - VOCP + R5 ´ I OCP --------------------- (5) R4 L1 D5 CV 䈖䈖䈪䇮 VOCP 䋺 ㆊ㔚ᵹᬌ䈚䈐䈇୯(−0.8V䋩 R5 䋺 R5 䈱ᛶ᛫୯ IOCP 䋺 OCP/BD ┵ሶᵹ㔚ᵹ䋨−40μA䋩 ࿑ 8-22 䊙䉟䊅䉴ᬌ OCP ࿁〝 ⺋േ䉕㒐ᱛ䈜䉎䈢䉄䇮OCP/BD ┵ሶ䈮䊐䉞䊦䉺䉕ᝌ䈚䉁䈜䇯 · R5 䈱⸳ቯ ౝㇱᛶ᛫䈱䊋䊤䉿䉨䈱ᓇ㗀䉕ዊ䈘䈒䈜䉎䈢䉄䈮䇮100䌾330Ω ⒟ᐲ䈮⸳ቯ䈚䉁䈜䇯 · C6 䈱⸳ቯ C6 䈲䇮᷷ᐲ䈮䉋䉎ኈ㊂ᄌൻ䈱ዋ䈭䈇䉅䈱䉕↪䈚䇮100pF䌾470pF ⒟ᐲ䉕⋡䈮⸳ቯ䈚䉁䈜䇯䈖䈱ኈ㊂䈏ᄢ䈐 䈜䈑䉎䈫䇮OCP 䈱ᔕ╵䈏ㆃ䈒䈭䉎䈢䉄䇮㔚Ḯേᤨ䈭䈬䈱ㆊᷰ⁁ᘒᤨ䈮䇮䊄䊧䉟䊮㔚ᵹ䊏䊷䉪䈏Ⴧ䈋䉎႐ว䈏 䈅䉍䉁䈜䇯 OCP/BD ┵ሶ䈱ㆊ㔚ᵹᬌ䈲䇮㔚ᵹ䊏䊷䉪ᬌ䈱䈢䉄䇮䊌䊪䊷MOSFET 䈏䉺䊷䊮䉥䊮䈜䉎㓙䈮↢䈛䉎䉰䊷䉳㔚 䈮 OCP 䈏ᔕ╵䈚䇮䊌䊪䊷MOSFET 䈏䉥䊐䈜䉎႐ว䈏䈅䉍䉁䈜䇯 䈖䈱⽎䉕㒐䈓䈢䉄䇮䊥䊷䊂䉞䊮䉫䊶䉣䉾䉳䊶䊑䊤䊮䉨䊮䉫ᯏ⢻䉕ౝ⬿䈚䈩䈇䉁䈜䇯䉺䊷䊮䉥䊮ᤨ䈱䉰䊷䉳㔚䈮ᔕ ╵䈚䈭䈇䉋䈉䇮䊌䊪䊷MOSFET 䈏䉥䊮䈚䈢⍍㑆䈎䉌䊥䊷䊂䉞䊮䉫䊶䉣䉾䉳䊶䊑䊤䊮䉨䊮䉫ᤨ㑆 tON(LEB)= 600ns 䉕⸳䈔䈩 䈇䉁䈜䇯 䈖䈖䈪䇮࿑ 8-23 䈱䉋䈉䈮䇮OCP/BD ┵ሶ㔚䈮↢䈛䉎䉺䊷䊮䉥䊮ᤨ䈱䉰䊷䉳㔚䈲䇮tON(LEB)䉋䉍⍴䈒䈭䉎䉋䈉䈮 ⺞ᢛ䈚䉁䈜䇯 䈖䈱䉰䊷䉳㔚䈏 tON(LEB)એ䈮䈭䈦䈢႐ว䈲䇮ᰴ䈱ᬌ⸛䉕ታᣉ䈚䇮䉰䊷䉳㔚୯䉇䉰䊷䉳䉕ਅ䈕䉎ᔅⷐ 䈏䈅䉍䉁䈜䇯 · 䉺䊷䊮䉥䊮䉺䉟䊚䊮䉫䈏䇮䊗䊃䊛ὐ䈮ว䈦䈩䈇䈭䈇႐ว䈲䇮VDS 㔚ᵄᒻ䈱䊗䊃䊛ὐ䈻ว䉒䈞䉎 · 㔚ᝄ䉮䊮䊂䊮䉰 CV ኈ㊂䉕ਅ䈕䉎 tON(LEB) OCPᬌᦼ㑆 S/GND VROCP 䉺䊷䊮䉥䊮ᤨ䈱䉰䊷䉳㔚 ࿑ 8-23 OCP ┵ሶ㔚(䊄䊧䉟䊮㔚ᵹ䉕 ROCP 䈪㔚ᄌ឵䈚䈢ᵄᒻ) Copy Right: SANKEN ELECTRIC CO., LTD. Page.20 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 8.10ㆊᾲ⼔ᯏ⢻(TSD) IC 䈱ᓮ࿁〝ㇱ䈱᷷ᐲ䈏䇮ᾲ⼔േ᷷ᐲ Tj(TSD)= 135°C(MIN)䈮㆐䈜䉎䈫䇮8.5 ㆊ㔚⼔ᯏ⢻䋨OVP䋩ห᭽䇮䊤䉾 䉼䊝䊷䊄䈪䉴䉟䉾䉼䊮䉫േ䉕ᱛ䈚䉁䈜䇯 䊤䉾䉼⁁ᘒ䈱⸃㒰䈲䇮㔚Ḯജ㔚䉕䉥䊐䈚䇮VCC ┵ሶ㔚䉕 VCC(OFF)એਅ䈮ਅ䈕䉎䈖䈫䈪ⴕ䈇䉁䈜䇯 8.11ᦨᄢ䉥䊮ᤨ㑆㒢ᯏ⢻ 㔚Ḯജ㔚䈏ૐ䈇⁁ᘒ䉇䇮㔚Ḯജ㔚䉥䊮䋯䉥䊐ᤨ䈭䈬䈱ㆊᷰ⁁ᘒ䈪䈲䇮䊌䊪䊷MOSFET 䈱䉥䊮ᤨ㑆䉕䇮 ᦨᄢ䉥䊮ᤨ㑆 tON(MAX)= 9.3μs䋨LC5556LD 䈲 11.2μs䋩䈮㒢䈚䉁䈜䋨࿑ 8-24 ෳᾖ䋩䇯 㔚Ḯ⸳⸘ᤨ䈮䇮㔚Ḯജ㔚ਅ㒢䇮⽶⩄ᦨᄢ䈱᧦ઙ䈪䇮䊌䊪䊷MOSFET 䈱䉥䊮ᤨ㑆䈏 tON(MAX)ᧂḩ䈪䈅䉎⏕ 䈏ᔅⷐ䈪䈜䇯 ID ᦨᄢ䉥䊮ᤨ㑆 ᤨ㑆 VDS ᤨ㑆 ࿑ 8-24 ᦨᄢ䉥䊮ᤨ㑆䈱⏕ Copy Right: SANKEN ELECTRIC CO., LTD. Page.21 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 9. ࿁〝ㇱຠ䈱ቯᢙ⸳ቯ䈮㑐䈜䉎ᵈᗧ㗄 l ജ⽶⩄䋺LED IC 䈱ቯᩰ㔚ᵹ䈫䈱㑐ଥ䈮ᵈᗧ䈏ᔅⷐ䈪䈜䇯䉁䈢䇮LED 䈱⋥ᢙ䈲 VLED䋼VAC 䈫䈭䉎䉋䈉䈮䈚䉁䈜䋨VAC䋼VLED 䈫䈭䉎䈫 LED 䈲ᶖἮ䈚䉁䈜䋩䇯 ᮡḰ⊛䈮䈲 VLED= 9䌾60V ⒟ᐲ䉕ᗐቯ䈚䈩䈇䉁䈜䇯 l 㔚ᵹㆶᵹ↪䈱䊐䊥䊷䊖䉟䊷䊦䉻䉟䉥䊷䊄䋺D5 ജ MOSFET 䈏䉥䊮ᦼ㑆䈮 L1 䈮⫾䈋䈢䉣䊈䊦䉩䉕䇮䉥䊐ᦼ㑆䈮䈖䈱䉻䉟䉥䊷䊄䉕䈚䈩 LED 䈮ଏ⛎䈚䉁䈜䇯 䈖䈱䊐䊥䊷䊖䉟䊷䊦䉻䉟䉥䊷䊄䈲䇮⠴䈫䊥䉦䊋䊥䊷䉺䉟䊛 trr 䈮ᵈᗧ䈚䈢ㆬᛯ䈏ᔅⷐ䈪䈜䇯 䊥䉦䊋䊥䊷䉺䉟䊛 trr 䈏㐳䈇䉻䉟䉥䊷䊄䉕ㆬᛯ䈜䉎䈫䇮ജ MOSFET 䈏䉺䊷䊮䉥䊮䈜䉎䈫䈐䈮䉰䊷䉳㔚ᵹ䈏 IC 䈮 ᵹ䉏䇮䊉䉟䉵䈱Ⴧᄢ䈫䇮䈠䉏䈮䈉 IC 䈱⺋േ䈱ේ࿃䈫䈭䉍䉁䈜䇯䉁䈢䇮ో䈱ല₸䈏ᖡൻ䈜䉎ⷐ࿃䈮䉅䈭䉎䈢 䉄䇮trr 㻡30ns 䈱䊥䉦䊋䊥䊷․ᕈ䉕䉅䈧䉻䉟䉥䊷䊄䉕ㆬᛯ䈚䉁䈜䇯 l 㔚ᵹᬌᛶ᛫䋺R3 R3 䈮䈲㜞ᵄ䉴䉟䉾䉼䊮䉫㔚ᵹ䈏ᵹ䉏䉎䈱䈪䇮ౝㇱ䉟䊮䉻䉪䉺䊮䉴䈱ᄢ䈐䈭䉅䈱䉕↪䈜䉎䈫䇮⺋േ䈱ේ࿃ 䈮䈭䉍䉁䈜䇯R3 䈲䇮ౝㇱ䉟䊮䉻䉪䉺䊮䉴䈏ዊ䈘䈒䇮䈎䈧䇮䉰䊷䉳⠴㊂䈱ᄢ䈐䈭䉅䈱䉕↪䈚䉁䈜䇯 Copy Right: SANKEN ELECTRIC CO., LTD. Page.22 LC5550LD 䉲䊥䊷䉵㩷 䉝䊒䊥䉬䊷䉲䊢䊮䊉䊷䊃 Rev. 1.2 ᵈᗧᦠ䈐 l ᧄ⾗ᢱ䈮⸥タ䈚䈩䈇䉎ౝኈ䈲䇮ᡷ⦟䈭䈬䈮䉋䉍੍๔䈭䈒ᄌᦝ䈜䉎䈖䈫䈏䈅䉍䉁䈜䇯 䈗↪䈱㓙䈮䈲䇮ᦨᣂ䈱ᖱႎ䈪䈅䉎䈖䈫䉕⏕䈚䈩䈒䈣䈘䈇䇯 l ᧄᦠ䈮⸥タ䈚䈩䈇䉎േ䈍䉋䈶࿁〝䈲䇮↪䈱ෳ⠨䈫䈚䈩␜䈚䈢䉅䈱䈪䇮䈖䉏䉌䈮࿃䈜䉎ᑷ ␠䉅䈚䈒䈲╙ਃ⠪䈱Ꮏᬺᚲᮭ䇮⍮⊛ᚲᮭ䇮䈠䈱ઁ䈱ᮭ䈱ଚኂ㗴䈮䈧䈇䈩ᑷ␠䈲৻ಾ⽿છ䉕 ⽶䈇䉁䈞䉖䇯 l ᑷ␠䈲ຠ⾰䇮ା㗬ᕈ䈱ะ䈮ദ䉄䈩䈇䉁䈜䈏䇮ඨዉຠ䈪䈲䇮䈅䉎⏕₸䈪䈱ᰳ㒱䇮㓚䈱⊒↢䈲 ㆱ䈔䉌䉏䉁䈞䉖䇯ຠ䈱㓚䈮䉋䉍⚿ᨐ䈫䈚䈩䇮ੱり䇮Ἣἴ䇮␠ળ⊛䈭៊ኂ䈭䈬䈏⊒↢䈚䈭䈇 䉋䈉䇮↪⠪䈱⽿છ䈮䈍䈇䈩䇮ⵝ⟎䉇䉲䉴䊁䊛䈪චಽ䈭ో⸳⸘䈍䉋䈶⏕䉕ⴕ䈦䈩䈒䈣䈘䈇䇯 l ᧄᦠ䈮⸥タ䈚䈩䈇䉎ຠ䈲䇮৻⥸㔚ሶᯏེ䋨ኅ㔚ຠ䇮ോᯏེ䇮ㅢା┵ᧃᯏེ䇮⸘᷹ᯏེ䈭䈬䋩䈮 ↪䈜䉎䈖䈫䉕ᗧ࿑䈚䈩䈍䉍䉁䈜䇯 㜞䈇ା㗬ᕈ䉕ⷐ᳞䈜䉎ⵝ⟎䋨ャㅍᯏེ䈫䈠䈱ᓮⵝ⟎䇮ㅢାภᓮⵝ⟎䇮㒐ἴ䊶㒐Ἣⵝ⟎䇮ฦ⒳ ోⵝ⟎䈭䈬䋩䈻䈱↪䉕ᬌ⸛䇮䈍䉋䈶৻⥸㔚ሶᯏེ䈪䈅䈦䈩䉅㐳ኼ䉕ⷐ᳞䈜䉎႐ว䈲䇮ᔅ䈝ᑷ ␠⽼ᄁ⓹ญ䈻⋧⺣䈚䈩䈒䈣䈘䈇䇯 ᭂ䉄䈩㜞䈇ା㗬ᕈ䉕ⷐ᳞䈜䉎ⵝ⟎䋨⥶ⓨቝቮᯏེ䇮ේሶജᓮ䇮↢⛽ᜬ䈱䈢䉄䈱ක≮ᯏེ䈭䈬䋩 䈮䈲䇮ᑷ␠䈱ᢥᦠ䈮䉋䉎วᗧ䈏䈭䈇㒢䉍↪䈚䈭䈇䈪䈒䈣䈘䈇䇯 l ᑷ␠䈱ຠ䉕↪䇮䉁䈢䈲䈖䉏䉕↪䈚䈢ฦ⒳ⵝ⟎䉕⸳⸘䈜䉎႐ว䇮ቯᩰ୯䈮ኻ䈜䉎䊂䉞䊧䊷䊁䉞䊮 䉫䉕䈬䈱⒟ᐲⴕ䈉䈎䈮䉋䉍䇮ା㗬ᕈ䈮ᄢ䈐䈒ᓇ㗀䈚䉁䈜䇯 䊂䉞䊧䊷䊁䉞䊮䉫䈫䈲ା㗬ᕈ䉕⏕䉁䈢䈲ะ䈜䉎䈢䉄䇮ฦቯᩰ୯䈎䉌⽶⩄䉕シᷫ䈚䈢േ▸࿐䉕⸳ ቯ䈚䈢䉍䇮䉰䊷䉳䉇䊉䉟䉵䈭䈬䈮䈧䈇䈩⠨ᘦ䈚䈢䉍䈜䉎䈖䈫䈪䈜䇯䊂䉞䊧䊷䊁䉞䊮䉫䉕ⴕ䈉ⷐ⚛䈮䈲䇮৻⥸ ⊛䈮㔚䇮㔚ᵹ䇮㔚ജ䈭䈬䈱㔚᳇⊛䉴䊃䊧䉴䇮࿐᷷ᐲ䇮Ḩᐲ䈭䈬䈱ⅣႺ䉴䊃䊧䉴䇮ඨዉຠ䈱⥄Ꮖ ⊒ᾲ䈮䉋䉎ᾲ䉴䊃䊧䉴䈏䈅䉍䉁䈜䇯䈖䉏䉌䈱䉴䊃䊧䉴䈲䇮⍍㑆⊛ᢙ୯䇮䈅䉎䈇䈲ᦨᄢ୯䇮ᦨዊ୯䈮䈧䈇䈩 䉅⠨ᘦ䈜䉎ᔅⷐ䈏䈅䉍䉁䈜䇯 䈭䈍䊌䊪䊷䊂䊋䉟䉴䉇䊌䊪䊷䊂䊋䉟䉴ౝ⬿ IC 䈲䇮⥄Ꮖ⊒ᾲ䈏ᄢ䈐䈒ធวㇱ᷷ᐲ䈱䊂䉞䊧䊷䊁䉞䊮䉫䈱 ⒟ᐲ䈏䇮ା㗬ᕈ䉕ᄢ䈐䈒ᄌ䈋䉎ⷐ⚛䈫䈭䉎䈱䈪චಽ䈮㈩ᘦ䈚䈩䈒䈣䈘䈇䇯 l ᧄᦠ䈮⸥タ䈚䈩䈇䉎ຠ䈱↪䈮䈅䈢䉍䇮ᧄᦠ⸥タ䈱ຠ䈮ઁ䈱ຠ䊶ㇱ᧚䉕⚵䉂ว䉒䈞䉎႐ว䇮䈅 䉎䈇䈲䈖䉏䉌䈱ຠ䈮‛ℂ⊛䇮ൻቇ⊛䇮䈠䈱ઁ䉌䈎䈱ടᎿ䊶ಣℂ䉕ᣉ䈜႐ว䈮䈲䇮↪⠪䈱⽿છ䈮 䈍䈇䈩䈠䈱䊥䉴䉪䉕ᬌ⸛䈱ⴕ䈦䈩䈒䈣䈘䈇䇯 l ᧄᦠ⸥タ䈱ຠ䈲⠴✢⸳⸘䉕䈚䈩䈍䉍䉁䈞䉖䇯 l ᑷ␠‛ᵹ✂એᄖ䈪䈱ャㅍ䇮ຠ⪭ਅ䈭䈬䈮䉋䉎䊃䊤䊑䊦䈮䈧䈇䈩䇮ᑷ␠䈲৻ಾ⽿છ䉕⽶䈇䉁䈞䉖䇯 l ᧄᦠ⸥タ䈱ౝኈ䉕䇮ᢥᦠ䈮䉋䉎ᒰ␠䈱ᛚ⻌䈭䈚䈮ォ⸥ⶄ䉕䈛䉁䈜䇯 Copy Right: SANKEN ELECTRIC CO., LTD. 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