BD9415FS Datasheet, PDF (22/34 Pages) Rohm – White LED Driver for 4Ch Large LCD Panels (DC/DC converter type)

BD9415FS
3.5.2 LED OPEN Detection
PWM1~4
VLED1
OPEN
THRFESHOLD
LED1=OPEN
LED1=Normal
Condition
LED1=OPEN
0.2V
0.2V
VLED2~4
Internal signal
(OPEN DET)
Internal signal
(Abnormal Count)
ILED1
3V
Mask
(4count)
Ab _<
normal
16384
count
Mask
(3count)
16384count
5V Pull Up
LED1≒Vout
LED1=Normal
Condition
3V
LED1=OFF
ILED2~4
FAILB
Internal signal
(Auto Restart)
IC State
Normal
Abnormal
Counting
Normal
Abnormal
Counting
AUto Restart Count Start
(131072count)
LED1 = OFF
131072count
Normal
Figure 25. LED OPEN Detection
Judge OK
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TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001