AC/DC PSR/Buck-Boost LEDIC RT7302/RT7304 DC/DC DC/DC (V) (V) (V) MOSFET (kHz) RT8450B 4.5 40 50 // Y 500 Vdc PWM TSSOP-16 WDFN-3x3-12 RT8452 4.5 36 48 // N 350 Vdc PWM SOP-16 WQFN-3x3-16 Vdc PWM SOP-16 WQFN-3x3-16 RT8482 RT8462 RT8475 RT8463 4.5 4.5 4.5 4.5 36 36 36 50 48 60 90 50 // // // // N 350 N Vdc PWM SOP-14 WQFN-3x3-16 350 Vdc PWM SOP-14 WQFN-3x3-16 470 Vdc PWM WDFN-3x3-12 TSSOP-14 350 N Y/0.3Ω AC 90~264V +/-1% PFTHD > 90% EMI RT7302 0.5S RT7302T8 TX1 DOUT BD Line C SIN R M1 R HV RT7302 CS ZCD VDD RST RT7304 GD Neutral VDD DAUX C VDD CS CVDD R CS Q1 RCS CCOMP R ZCD1 RG RPC COMP GND ZCD DAUX R ZCD2 RT7302 Efficiency v.s. Vac_in RT7302 PF v.s. Vac_in RT7302 line regulation RT7302 THD v.s. IEC-61000-3-2 Class C RZCD2 RZCD1 DC/DC (V) (V) (V) MOSFET (kHz) RT8453B 4.5 40 40 Y 500 Vdc PWM PSOP-8 RT8480 4.5 36 60 N 380 Vdc PWM SOP-16 RT8458D 10 31 500 N 160 RT8474 4.5 50 50 Y/0.15Ω 490 Vdc PWM PSOP-8 RT8477 4.5 50 50 N 380 Vdc PWM SOP-8 Vdc TSOT-23-6 BD Line RT8474 RT7300 PSR DC/DC Buck PFC controller Neutral MOSFET VDD=5V PWM/Analog Iload=20mA dimming signal RFID RT7302 V RT7304 V RT7305 V www.richtek.com V Frank Gao Tel: 21-50276966 ext. 309 [email protected] V SOP-8 SOT23-6 V www.richtek.com John Lin Tel: 755-88353955 ext. 810 [email protected] DOUT VOUT+ COUT R PC COMP GND CSIN VOUT- Q1 GD R M2 CCOMP TX1 BD Line C OUT HV MULT Neutral VOUT+ RT7304 SOP-7 VOUT- MR16/AR111 RT8476/RT8479 IC RT7321/RT7322 RT8479PF>0.9RT8476PF>0.7 99% (Richtek patented) MR16AR111 RT8479MOS7WRT8476MOS Boost L1 L2 Buck L2 D1 C1 220u C2 6 Vcc + RT8476 Q1 1 Gate1 2 CS1 7 Creg Rs1C5 RT8476 EVB GND 4 D1 12Vac D2 R4 CS2 5 OVP 3 Gate2 L4 R5 Buck C1 220u + 12Vac Boost L1 Rs2 C2 1 LED C6 7 C3 LX1 R4 ISN 5 2 OVP RT8479 R5 X-cap D2 R RSE L4 C6 C5 9 (Exposed Pad) AC T Vp 4 x VF 2 x VF S2 6 GND T0T1 T2 T3 T4 Boost voltage Power factor: 0.98 Stable LED current Ch1 25.0 V BW Ch2 Ch3 200mA Ω BW Ch4 10.0 V BW M 4.00 ms A 2.00 A Ω Ch1 16.0V G1 G1 G3 G1 T3-T4 (Vac>3VF) VF MR16 4, 7 2P2S T2-T3 (Vac>2VF) 3 x VF ET current: peak value(1.44A) 4S T1-T2 (Vac>1VF) T T 1 3 S1 S3 3 S4 CREG 20mm Flicker-free operation! HV 8 LED, RT7321/22T1-T2G3, T2-T3G3G4 ET voltage 22mm 2 9 Tek Stop 28mm 1 HV1 MOV 7N391U AC LED , RT8479 RT8479EVB RT7321 Rs1 8 LX2 4 VCOMP 3 SGND GND Q2 8 6 Vcc G1 T4-T5 (Vac>4VF) T5 T G1 G2 G3 G4 G2 G2 G2 G3 G3 G1 G4 G2 G2 G3 G3 G4 Vac [V] Iac [mA] PF Pin [watt] P_LED1 P_LED2 P_LED3 P_LED4 P_total Eff(%) THD(%) 200 30.9 0.95 6.02 1.53 1.41 1.53 0.83 5.30 87.99 21.23 220 34.6 0.96 7.31 1.72 1.61 1.70 1.24 6.27 85.77 17.06 240 35.5 0.93 7.99 1.73 1.65 1.73 1.48 6.59 82.48 15.86 LED RT7320 RT7321/RT7322 www.richtek.com www.richtek.com PSOP-8 V PSOP-8, QFN-5*5