SM8131B00B データシートの表示（PDF） - Nippon Precision Circuits

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SM8131B00B

White LED Driver IC

Nippon Precision Circuits  

SM8131B

Switching to power-save mode

The internal circuit operating mode switches from ×1.0/×1.5 mode to power-save mode when both EN1 and

EN2 go LOW and do not switch HIGH for an interval of 1.63ms (max). This function turns the LEDs OFF and

automatically transfers internal circuit control to power-save mode, suppressing current consumption.

EN1 input

EN2 input

EN1+EN2

(1)

Internal

enable (CE)

(2)

Power

save

1.0 or 1.5

CE hold time 1.63ms (max)

Power

save

EN input signal and internal enable signal “CE”

(1) If the EN signals are input after power is applied and the POR time has expired, the internal enable signal

“CE” switches with the EN1 + EN2 signal.

(2) If the internal enable signal “CE” goes from HIGH to LOW and are held for an interval greater than the

“CE” hold time 1.63ms (max), the SM8131B switches to power-save mode. The internal circuits are reset

on the “CE” falling edge, and the current setting must be re-established before restart.

NIPPON PRECISION CIRCUITS INC.—10

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