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HT7939 Datasheet(PDF) 8 Page - Holtek Semiconductor Inc |
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HT7939 Datasheet(HTML) 8 Page - Holtek Semiconductor Inc |
8 / 13 page Application Circuits HT7939 Rev 1.10 8 November 3, 2009 H T 7 9 3 9 V I N E N S W O V P F B 1 0 m H 2 . 2 m F R f b 0 . 7 7 W G N D 4 . 7 m F V I N 4 . 5 V ~ 5 . 5 V 1 N 5 8 1 9 1 3 S t r i n g s 1 0 k W 1 5 0 k W V D C D i m m i n g 0 V ~ 3 . 3 V Figure 15. Application Circuit for Dimming Control Using a DC Voltage H T 7 9 3 9 V I N E N S W O V P F B 1 0 m H 2 . 2 m F R f b 0 . 7 7 W G N D 4 . 7 m F V I N 4 . 5 V ~ 5 . 5 V 1 N 5 8 1 9 1 3 S t r i n g s L : G S 5 4 - 1 0 0 K ( G A N G S O N G ) C 1 : G R M 2 1 B R 6 1 E 4 7 5 K A 1 2 L ( M U R A T A ) C 2 : G R M 2 1 B R 7 1 E 2 2 5 K A 7 3 L ( M U R A T A ) Figure 13. Application Circuits for Driving 39 WLEDs H T 7 9 3 9 V I N E N S W O V P F B 1 0 m H 2 . 2 m F R f b 0 . 7 7 W G N D 4 . 7 m F V I N 4 . 5 V ~ 5 . 5 V 1 N 5 8 1 9 1 3 S t r i n g s P W M S i g n a l Figure 14. Application Circuit for Dimming Control Using a PWM Logic Signal |
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