參數(shù)資料
型號: LM2622-ADJMWC
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: 2.3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, UUC
封裝: WAFER
文件頁數(shù): 5/19頁
文件大小: 478K
代理商: LM2622-ADJMWC
Application Information (Continued)
appears across C6 when the switch is closed. When the
switch opens, C6 is referenced to the 8V output minus a
diode drop, which raises the voltage at C6 with respect to
ground to about 24V. Hence, in the fourth stage, C7 is
charged to 24V when the switch is open. From the first stage
to the last, there are three diode drops that make the output
voltage closer to 24 - 3xVDIODE (about 22.8V if a 0.4V
forward drop is assumed).
TABLE 1. Components For Circuits in
Component
600 kHz
1.3 MHz
L
10H
4.7H
COUT1
10F
22F
COUT2
10F
NOT USED
CC
3.9nF
1.5nF
CFB1
0.1F
15nF
CFB2
NOT USED
560pF
CIN
10F
22F
C1
4.7F
Component
600 kHz
1.3 MHz
C2
0.1F
C4
1F
C5
1F
C6
1F
C7
1F
RFB1
40.2k
91k
RFB2
7.5k
18k
RC
5.1k
10k
D1
MBRM140T3
D2
BAT54S
D3
D4
BAT54S
D5
D6
BAT54S
D7
600 kHz Operation
10127331
FIGURE 4. 600 kHz operation
LM2622
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