LM2622MM-ADJ National Semiconductor, LM2622MM-ADJ Datasheet - Page 13

• Manufacturer Part Number: LM2622MM-ADJ
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,TSSOP,8PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LM2622MM-ADJ

• Rohs Compliant: NO

Application Information
referenced to ground. In the third stage, the 16V at C5
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).
Component
L
COUT1
COUT2
CC
CFB1
CFB2
CIN
C1
TABLE 1. Components For Circuits in Figure 3
600 kHz
10µH
10µF
10µF
3.9nF
0.1µF
NOT USED
10µF
4.7µF
(Continued)
1.3 MHz
4.7µH
22µF
NOT USED
1.5nF
15nF
560pF
22µF
4.7µF
FIGURE 4. 600 kHz operation
13
600 KHZ OPERATION
Component
C2
C4
C5
C6
C7
RFB1
RFB2
RC
D1
D2
D3
D4
D5
D6
D7
600 kHz
0.1µF
1µF
1µF
1µF
1µF
40.2kΩ
7.5kΩ
5.1kΩ
MBRM140T3
BAT54S
BAT54S
BAT54S
10127331
1.3 MHz
0.1µF
1µF
1µF
1µF
1µF
91kΩ
18kΩ
10kΩ
MBRM140T3
BAT54S
BAT54S
BAT54S
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