FA5530 Datasheet, PDF (3/4 Pages) List of Unclassifed Manufacturers – Quasi-Resonant IC

Quasi-Resonant IC FA5530/31/32
Low dV/dt slope of Drain Voltage “Vds”
Valley
SSwwititcchhininggFFrreeqquueennccyyvvss. ^{.OOuuttppuuttPPoowweerr}
TTimimininggCChhaarrtt((FFAA55553311/3/322))
Valley
V^Vd^ds^s
fsw
Maximum Frequency :
65kHz_Mo_ar _x13_f0_sk_wHz
(130kHz)
Maxim_最um_大
Frequen^fc^sy^w
113/1030kkHHzz
113/103k0kHHzz
Example:
1kH₍z_{1 k H z )}
Output Power^PP^oo
• Low frequency switching such as 1kHz
VaVlalellyey
Sig^信na^号l
OUTOUpiTn
v^パolt^ルag^スe
at light load reduces standby power.
• Maximum frequency limits EMI noise and switching Loss.
重_He負_av荷_y
Load
M^中i^負dd^荷le
Load
M最ax大imfusmw 低Pe下riod
is ₍1_最/ (_小Mi₁n_kim_Hu_zm₎
Frequency).
Example :1kHz
軽_L負_igh荷_t
Load
• Switching at Valley of Vds : Turn-ON Loss and Noise are very small.
• Low dV/dt of Vds at Turn-OFF by a capacitor connected between Drain and Source
of Power MOSFET : Turn-OFF Loss and Noise are also very small.