FA5532 데이터 시트보기 (PDF) - Unspecified

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FA5532

Quasi-Resonant IC

Unspecified 

Quasi-Resonant IC FA5530/31/32

Low dV/dt slope of Drain Voltage “Vds”

Valley

SSwwititcchhininggFFrreeqquueennccyyvvss. .OOuuttppuuttPPoowweerr

TTimimininggCChhaarrtt((FFAA55553311/3/322))

Valley

VVddss

fsw

Maximum Frequency :

65kHzMoar x13f0skwHz

(130kHz)

Maxim最um大

Frequenfcsyw

113/1030kkHHzz

113/103k0kHHzz

Example:

1kH(z1 k H z )

Output PowerPPoo

• 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Mi1nkimHuzm)

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.

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