LED7706 datasheet(13/31 Pages) STMICROELECTRONICS

Numer części	LED7706

Szczegółowy opis	6-rows 30 mA LEDs driver with boost regulator for LCD panels backlight

PDF	31 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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13 / 31 page

LED7706

Operation description - boost section

13/31

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

SGND

LED7706

220k

100n

BAS69

LED7706 Arkusz danych(PDF) 13 Page - STMicroelectronics