BD94121F Datasheet, PDF (18/28 Pages) Rohm – PFC Direct current resonance type White LED Driver for Large LCD

BD9412F
When it Detects Timer Latch Type Error
STB
2.0V
2.5V
SS
2.0V
FB
ADIM/4.4
IS
ADIM/8.8
1.25V
VS
3.2V
1.0V
4
1.25V
COMPSD 1.80V
2.5V
2.0V
2.0V
CP
FAIL
Figure. 27 Timing Chart 2
[The explanation of Time latch type error detection]
Due to the timing of ④ in the above chart, the IC detects abnormal and starts the timer latch charging. For ④, the
abnormal is detected according to the conditions in the table shown below.
No.
Content of Abnormal Detection
④
Abnormal LED voltage detection
Condition of Abnormal Detection
VS≥ 1.25V
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TSZ02201-0F5F0C100100-1-2
22.Feb.2016 Rev.001