FA5540 Fuji Electric holdings CO.,Ltd, FA5540 Datasheet - Page 20
FA5540
Manufacturer Part Number
FA5540
Description
Fuji Switching Power Supply Control Ic
Manufacturer
Fuji Electric holdings CO.,Ltd
Datasheet
1.FA5540.pdf
(32 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
FA5540AN-D1-TE1
Manufacturer:
TOSHIBA
Quantity:
33 789
9. Description of the function
Rev.0 July-2007
(1) Steady- state operation
At each switching cycle, TURN ON is carried out at the first Valley signal that exceeds the time corresponding to the
maximum frequency limit of 60kHz(FA5540)/120kHz(FA5541/42), counting from the previous TURN ON.
Max. fsw
最大
Valley
signal
pulse
Val
信号
OUT
パル
Out
Vds
ley
fsw
ス
120kHz(FA5541/42)
60kHz(FA5540)
Fig.3 Steady-state operation timing chart
Heavy load
120kHz(FA5541/42)
FA5540/5541/5542
60kHz(FA5540)
middle load
20
120kHz(FA5541/42)
60kHz(FA5540)
light load (stand-by)
Fuji Electric Device Technology