LED1642GWPTR datasheet(26/42 Pages) STMICROELECTRONICS

Numer części	LED1642GWPTR

Szczegółowy opis	16 channel LED driver with error detection current gain control

PDF	42 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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26 / 42 page

Configuration register

LED1642GW

26/42

DocID024395 Rev 6

Figure 21. SDO delay

8.7

Gradual output delay (CFG-14)

The gradual output delay consists of turning on gradually the current generators avoiding to

turn on all channels at the same time.

When PWM counter enables the device channels, the outputs can be turned on

simultaneously or with a progressive delay. Thanks to configuration register CFG -14 bit, the

user can decide to put a delay among outputs (10 ns from each channel to the next one,

around 150 ns between first and last channel). The typical output timing is shown in

Figure 22. This feature prevents the inrush current and reduces the bypass capacitor value.

AM13702V1

(a)

(b)

(a) Data shifted out of the SDO with the device propagation delay

(b) Data shifted out of the SDO by the falling edge of the CLK

LED1642GWPTR Arkusz danych(PDF) 26 Page - STMicroelectronics