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AN2809 数据表(PDF) 3 Page - STMicroelectronics

部件名 AN2809
功能描述  The LED7706 consists of a high-efficiency monolithic boost converter and six controlled
PDF  22 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN2809 数据表(HTML) 3 Page - STMicroelectronics

  AN2809 Datasheet HTML 1Page - STMicroelectronics AN2809 Datasheet HTML 2Page - STMicroelectronics AN2809 Datasheet HTML 3Page - STMicroelectronics AN2809 Datasheet HTML 4Page - STMicroelectronics AN2809 Datasheet HTML 5Page - STMicroelectronics AN2809 Datasheet HTML 6Page - STMicroelectronics AN2809 Datasheet HTML 7Page - STMicroelectronics AN2809 Datasheet HTML 8Page - STMicroelectronics AN2809 Datasheet HTML 9Page - STMicroelectronics Next Button
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AN2809
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List of figures
Figure 1.
LED7706 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
LED7706 board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3.
Top side component placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4.
Bottom side test points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5.
SW1 (FSW) setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6.
SW2 (MODE) setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7.
LED7706 demonstration board and white LEDs test board assembly . . . . . . . . . . . . . . . . 12
Figure 8.
LED7706 board test setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 9.
LED7706 synchronization setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10.
Efficiency measurements setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 11.
Efficiency vs DIM duty cycle, VIN=12V, 10 white LEDs in series, IOUT = 120mA . . . . . . . . 17
Figure 12.
Efficiency vs DIM duty cycle, VIN=24V, 10 white LEDs in series, IOUT = 120mA . . . . . . . . 17
Figure 13.
WLEDs test board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 14.
WLEDs test board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19



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