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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT3797 датащи(PDF) 29 Page - Linear Technology |
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LT3797 датащи(HTML) 29 Page - Linear Technology |
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29 / 36 page  LT3797 29 3797f For more information www.linear.com/LT3797 TYPICAL APPLICATIONS Triple Boost LED Driver RSS1-3** 470k OVLO CTRL1-3 VREF VREF RT SYNC SW1 BOOST INTVCC INTVCC GND VC1-3 FBH1-3 SW2 RT 48.7k 300kHz CSS1-3 0.1µF LPWR 47µH PWM1-3 FLT1-3 FLT1-3 SS1-3 SS1-3 INTVCC VREF 100k CIN1-3 4.7µF ×3 CIN3 1µF CBST 0.1µF *D4-6: OPTION FOR SHORT LED PROTECTION **RSS1-3: OPTIONAL FOR FAULT LATCHOFF CVCC 10µF 3797 TA02 CC1-3 10nF RC1-3 4.7k R12-R14 1M R9-R11 20.5k R7 47.5k VIN 2.5V TO 40V (60V TRANSIENT, 41V INTERNAL OVLO PROTECTION) R8 49.9k ISP1-3 EN/UVLO D1-D3: DIODES INC. PDS5100 D4-D6: VISHAY SILICONIX ES1C L1-L3: COILTRONICS HC9-100-R LPWR: COILTRONICS SD25-470 M1, M3, M5: INFINEON BSC123N08NS3-G M2, M4, M6: VISHAY SILICONIX Si7113DN VIN ISN1-3 GATE1 SENSEP1 SENSEN1 TG1 R1 8m R3 8m R5 8m M2 M4 M3 M6 M5 M1 0.1µF D1 D4* VLED1+ D5* VLED2+ D6* VLED3+ D2 D3 COUT1 4.7µF 100V ×2 COUT2 4.7µF 100V ×2 COUT3 4.7µF 100V ×2 R6 250m L1 10µH L2 10µH L3 10µH GATE2 SENSEP2 SENSEN2 TG2 LT3797 GATE3 SENSEP3 SENSEN3 TG3 1A 50V ISN3 ISP3 R4 250m ISN2 ISP2 R2 250m ISN1 ISP1 1A 50V 1A 50V 487k 75k VIN 0.1µF 0.1µF Efficiency and Output Current vs VIN Fault (Short LED) Protection without RSS1-3: Hiccup Mode Fault (Short LED) Protection without RSS1-3: Latchoff Mode 500:1 PWM Dimming at 120Hz VIN (V) 0 50 55 65 70 75 100 85 10 20 25 3797 TA02b 60 90 95 80 0 0.2 0.6 0.8 1.0 2.0 1.4 0.4 1.6 1.8 1.2 5 15 30 35 40 PWM1-3 = 2V EFFICIENCY OUTPUT CURRENT PWM 5V/DIV IL 5A/DIV ILED 1A/DIV 5µs/DIV VIN = 12V 3797 TA02c SS1-3 2V/DIV IM2,4,6 10A/DIV VLED1-3+ 50V/DIV FLT1-3 10V/DIV 50ms/DIV 3797 TA02d SS1-3 2V/DIV IM2,4,6 10A/DIV VLED1-3+ 100V/DIV FLT1-3 10V/DIV 50ms/DIV 3797 TA02e |
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