CYNTEC VPN12AD02-FU 매뉴얼 - 페이지 6
{카테고리_이름} CYNTEC VPN12AD02-FU에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. CYNTEC VPN12AD02-FU 12 페이지.
페이지 인쇄Frequency Setting
The switching frequency can be set from 200 kHz to 400 kHz by an external resistor. Select the
switching frequency with an external resistor according to the following approximate formulas.
46023
R
[k Ω ] =
FREQ
Output Voltage Setting
For a voltage regulator, the output voltage can be set by selecting the values R20, R21 according to
the following equation. IFBL typical value is 30uA. V
V
FBH-FBL
V
=
(
OUT
R20
VPN12AD02-FU EVB GUIDE
VOUT
VFB
GND
Figure 4: VFB Protection Pin
Table 7: Parameter Value Setting
VOUT OVP
Short Protection
R
(Ω)
VFBH
R
(Ω)
VFBL
1.25
.
(
)
F
[kHz]
SW
Table 8: Parameter Value Setting
Vout
R12 (Ω)
I
) R21 +V
FBL
FBH-FBL
Table 9: Parameter Value Setting
Vout
R20 (Ω)
R21 (Ω)
VOUT
R
VFBH
R
VFBL
15.1V
5.8V
=R22 =14k
=R23 =1.5k
350kHz
30k
typical value is 150mV.
FBH-FBL
12.1V
150
12.4k
6
Rev. P05