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LED7706 Scheda tecnica(PDF) 13 Page - STMicroelectronics

Il numero della parte LED7706
Spiegazioni elettronici  6-rows 30 mA LEDs driver with boost regulator for LCD panels backlight
PDF  31 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED7706 Scheda tecnica(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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