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LED7706TR bảng dữ liệu(PDF) 13 Page - STMicroelectronics

tên linh kiện LED7706TR
Giải thích chi tiết về linh kiện  6-rows 30 mA LEDs driver with boost regulator for LCD panels backlight
PDF  31 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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LED7706TR bảng dữ liệu(HTML) 13 Page - STMicroelectronics

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LED7706
Operation description - boost section
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6.2
Enable function
The LED7706 is enabled by the EN pin. This pin is active high and, when forced to SGND,
the device is turned off. This pin is connected to a permanently active 2.5
µA current source;
when sudden device turn-on at power-up is required, this pin must be left floating or
connected to a delay capacitor. When turned off, the LED7706 quickly discharges the
soft-start capacitor and turns off the Power MOSFET, the current generators and the LDO.
The power consumption is thus reduced to 20
µA only.
In applications where the dimming signal is used to turn on and off the device, the EN pin
can be connected to the DIM pin as shown in Figure 5.
Figure 5.
External sync waveforms
DIM
EN
SGND
LED7706
220k
100n
BAS69



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