lx1660 Microsemi Corporation, lx1660 Datasheet - Page 9

• Manufacturer Part Number: lx1660
• Description: Advanced Pwm Controller
• Manufacturer: Microsemi Corporation

Copyright © 1998
Rev. 1.1
Note: Costs are estimates only. Check with suppliers for exact
7/98
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Jumper
quotation.
VID0
VID1
VID2
VID3
TABLE 1 - Voltage Identification Code (VID)
1k, 1%
VID2
R20, 2.5k 1%
R24
R23, 20k 1%
R22, 10k 1%
U2
R21, 5k 1%
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
8
4
1/2 LM358
3
2
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Figure 6 — Low Cost Programmable Power Supply For Socket 7 Processors
R16
10k
C3
0.1µF
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
VID0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
R4
1k
P
C4
390pF
A
A P P L I C A T I O N I N F O R M A T I O N
R O D U C T I O N
D V A N C E D
Output Voltage
C8
680pF
OUTEN
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
1
2
3
4
5
6
7
8
EN
OT
SGND
V
INV
NINV
HICCUP
C
REF
T
ADJ
16-pin SOIC
P W M C
LX1661
U1
SYNCEN
D
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).
PGND
BDRV
TDRV
CS+
CS-
A T A
V
V
C1
CC
O N T R O L L E R
16
15
14
13
12
11
10
9
12V
S
H E E T
C9
1µF
IRL3103
Q1
C1
390pF
5µH Toroid
D1
Sanyo MV-GX or equivalent
L1
R5, 1k
R6, 1k
16V, 1000µF
C2
LX1660/1661
R1, 5m
C7
Sanyo MV-GX or
16V, 1000µF
equivalent
C5
V
IN
V
OUT
5V
C6
9