LX1660 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1660 Datasheet PDF : 15 Pages
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PRODUCT DATABOOK 1996/1997
ADVANCED PWM CONTROLLER
PR O D U C T I O N D ATA S H E E T
LX1660/1661
APPLICATION INFORMATION
OUTEN
12V
VIN 5V
C2
C7
U2 1/2 LM358
8
3
4
2
R24
1k, 1%
Jumper R23, 20k 1%
VID0
R22, 10k 1%
VID1
R21, 5k 1%
VID2
R20, 2.5k 1%
VID3
R16
10k
C3
0.1µF
R4
1k
C4
390pF
U1
LX1661
1 EN
2 OTADJ
3 SGND
4 VREF
5 INV
6 NINV
7 HICCUP
8 CT
VC1 16
TDRV 15
PGND 14
BDRV 13
VCC 12
SYNCEN 11
CS+ 10
CS- 9
C8
680pF
16-pin SOIC
Q1
IRL3103
16V, 1000µF
Sanyo MV-GX or equivalent
C9
1µF
L1
R1, 5m
5µH Toroid
D1
R5, 1k
C1
390pF
R6, 1k
VOUT
C5
C6
16V, 1000µF
Sanyo MV-GX or
equivalent
Figure 6 — Low Cost Programmable Power Supply For Socket 7 Processors
TABLE 1 - Voltage Identification Code (VID)
VID3 VID2 VID1 VID0 Output Voltage
1
1
1
1
2.0V
1
1
1
0
2.1V
1
1
0
1
2.2V
1
1
0
0
2.3V
1
0
1
1
2.4V
1
0
1
0
2.5V
1
0
0
1
2.6V
1
0
0
0
2.7V
0
1
1
1
2.8V
0
1
1
0
2.9V
0
1
0
1
3.0V
0
1
0
0
3.1V
0
0
1
1
3.2V
0
0
1
0
3.3V
0
0
0
1
3.4V
0
0
0
0
3.5V
Note: Costs are estimates only. Check with suppliers for exact
quotation.
Setting The Output Voltage
The output voltage is set by means of a 4-bit digital VID code.
For processors that do not have VID coded into the package, the
VID code can be set by means of a jumper or DIP switch. For
low or ‘0’ signal, connect the VID pin to ground (DIP switch
ON). For high or ‘1’, leave open (DIP switch OFF).
Copyright © 1998
Rev. 1.1 7/98
9
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