BD92111F Datasheet, PDF (18/28 Pages) Rohm – PFC Direct current resonance type White LED Driver for Large LCD

BD92111F
When it Detects Timer Latch Type Error
STB
2.0V
(A)
3.0V
SS
3.0V
SDON
FB
IS
0.625V
1.25V
0.7V
1.25V
VS
3.2V
3
1.25V
(A)
3.0V
3.0V
４
4.0V
4.0V
COMP
COMSD 1.80V
2.0V
CP
(E) (F)
FAIL
Figure. 26 Timing Chart 2
[The explanation of Time latch type error detection]
Due to the timing of③ and ④ in the above chart, the IC detects abnormal and starts the timer latch charging. For ③
and ④, the abnormal is detected according to the conditions in the table shown below.
No.
Content of Abnormal Detection
Condition of Abnormal Detection
③
Abnormal LED voltage detection
VS≥ 1.25V
④
Over voltage detection (multipurpose
protection function)
COMP≥ 4.0V
(release at COMP<3.8V)
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TSZ02201-0F5F0C100090-1-2
31.Jan.2016 Rev.001