 English |
|
|
|
|
|
|
|
| BD9489F Datasheet, PDF (30/39 Pages) Rohm – DCDC converter with current mode | |||
| |||
| ◁ |
BD9489F
3.5.6 FBMAX Detection
Datasheet
Figure 41. FBMAX Detection
(*2)â¦During the soft start, it is not judged to the abnormal state even if the FB=H(FB>4.0V).
(*3)â¦When the PWM=H and FB=H, the abnormal counter doesnât start immediately.
(*4)â¦The CP charge will start if the PWM=H and the FB=H detection continues up to 4 clocks of the GATE frequency. Once the
count starts, only FB level is monitored.
(*5)â¦When the FBMAX detection continues till the CP charge reaches 3.0V, IC will be latched off. The latch off interval can be
calculated by the external capacitance of CP pin. (Please refer to the section 3.2.8.)
(*6)â¦The latch off state can be reset by the STB=L.
(*7)â¦It is normally started by PWM=L to H, in this figure.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ã»15ã»001
30/36
TSZ02201-0F1F0C100250-1-2
29.Oct 2014 Rev.002
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese