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LTM8005 Arkusz danych(PDF) 21 Page - Linear Technology |
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LTM8005 Arkusz danych(HTML) 21 Page - Linear Technology |
21 / 26 page LTM8005 21 8005f For more information www.linear.com/LTM8005 TYPICAL APPLICATIONS 1.2A at up to 17V LED String from 6V to 18VIN (Buck-Boost Mode) with Spread Spectrum LTM8005 8005 TA02 EN/UVLO OVLO PWM VREF CTRL1 CTRL2 VOUT ISN LED AUX FB ISMON RAMP SS VC RT GND OPENLED SHORTLED IVINP VIN IVINN SW DA COUT 2× 10µF 50V L 10µH L: COILCRAFT XAL8080-103ME CIN: MURATA GRM31CR71E106KA12 COUT: MURATA GRM32ER71H106KA12 PIN NOT USED IN THIS CIRCUIT: IVINCOMP 100k 113k 1M 2.4k 23.2k f = 350kHz 10nF 6.8nF 0.1µF 0.1µF CIN 2× 10µF 25V 21.5k 348k LED STRING VIN 6V TO 18V 73.2k (OPTIONAL ULTRA-FAST DIODE IF LED STRING IS FAR AWAY) VIN 6VIN to 31VIN to 36VOUT Boost Regulator LTM8005 8005 TA03 EN/UVLO OVLO PWM VREF CTRL1 CTRL2 IVINCOMP VOUT ISN LED AUX FB ISMON RAMP SS VC RT GND OPENLED SHORTLED IVINP VIN IVINN SW DA COUT 3× 4.7µF 50V COUT2 56µF VOUT 36V L 4.7µH RSENSE 7m CIN, COUT1: MURATA GRM31CR71H475KA12 COUT2: SUNCON 50HVP56M L: XAL8080-472MEB RSENSE: VENKEL ULCR2512-7M00JT 95.3k 16.9k 1M 10k 31.6k f = 250kHz 22nF 0.1µF 0.22µF CIN 3× 4.7µF 50V 12.4k 348k VIN 6V TO 31V 38V MAX. 33V OVLO + |
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