CYNTEC VPN12AD02-FU 매뉴얼 - 페이지 2
{카테고리_이름} CYNTEC VPN12AD02-FU에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. CYNTEC VPN12AD02-FU 12 페이지.
페이지 인쇄OVP
Short Protection
Jumper JR25
R
VFBH
R
VFBL
Frequency 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
LED Constant Current Setting
V
typical value is 150mV. Set the LED current with an external resistor according to the
FBH-FBL
following approximate formulas.
= V
FBH-FBL
I
LED
R26
VOUT
VFB
GND
Figure 1: VFB Protection Pin
Table 2: Parameter Value Setting
33.8V
13V
open
(Ω)
=R22 =32.2k
(Ω)
=R23=1.5k
1.25
.
(
)
F
[kHz]
SW
Table 3: Parameter Value Setting
Vout
R12 (Ω)
Table 4: Parameter Value Setting
ILED
R26 (Ω)
VPN12AD02-FU EVB GUIDE
VOUT
R
VFBH
R
VFBL
17.6V
6.8V
short
=R22//R25 =16.6k
=R23=1.5k
250kHz
350kHz
46.4k
30k
1A
1.5A
150m
100m
2
400kHz
25.5k
2A
75m
Rev. P05