FA7711V Datasheet, PDF (24/25 Pages) Fuji Electric – FUJI Power Supply Control IC

FA7711V
To determine the value of circuit components, it
cannot decide here since conditions change a lot with
the value of an output filter or others, but generally
adjust the value between 1k Ω and 100k Ω of
resistor R_FB and the value between 1nF and 100nF of
capacitor C_FB. However the operation of switching
power supply changes by load condition, duty cycle,
temperature, etc., so when determine the value of
components, examine with the real load condition in
actual circuit.
Vout
IN+
IN-
RFB CFB
FB
Fig.22
0dB
180
°
Phase margin
0°
50 dgree
Fig.23
Gain margin
10dB
Fuji Electric Systems Co., Ltd.
AN-060E Rev.1.0
24
Jun-2010
http://www.fujielectric.co.jp/fdt/scd/