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LX1672-03CLQ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
PRODUCTION D
A
TA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
Copyright © 2000
Rev. 1.0, 2005-08-10
WWW.Microsemi .COM
LX1672
Multiple Output LoadSHARE™ PWM
TM
®
BLOCK DIAGRAM
CS Comp
+
-
Amplifier/
Compensation
+
-
Error Comp
+
-
I
RESET
R
S
Q
Q
V
TRIP
20k
V
REF
Hiccup
Ramp
Oscillator
UVLO
L2
ESR
C
OUT
C
IN
+5V
R
SET
VCC
LO2
HO2
VC2
CS2
FB2
SS
I
SET
PWM
I
SET
+5V
EO2
VS2
VCCL
PG2
UVLO
RF2
PHASE1
FAULT
TEMP
SS1
SS2
F
R
S
S
S
+5V
CSS
LPF1
LPF2
5.5V
16V
16V
DIS 2
Vin
V out 2
Figure 3– Block Diagram of Phase 2 Connected in LoadSHARE Mode
Note: With the MLPQ package there is only one PGX output (PG1 and PG2 are common)
B
B
L
L
O
O
C
C
K
K
D
D
I
I
A
A
G
G
R
R
A
A
M
M
PRODUCTION D
A
TA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
Copyright © 2000
Rev. 1.0, 2005-08-10
WWW.Microsemi .COM
LX1672
Multiple Output LoadSHARE™ PWM
TM
®
APPLICATION CIRCUIT
+12V
L1
+
+5V
+5V
+
1.5VDC
+
+3.3V
L2
+
+2.7V
+3.3V
HO2
LO2
PG2
LDGD
LDFB
LDDIS
DGND
AGND
DIS2
SS2
RF2
FB1
EO1
CS1
VS1
VCC
VCCL
PG1
LO1
HO1
VC1
VC2
FB2 SS1
EO2 DIS1
CS2 VS2
+5V
Figure 4 – Bi-Phase Operation With Phase 1 & 2 LoadSHARING™ From 5V & 3.3V
A
A
P
P
P
P
L
L
I
I
C
C
A
A
T
T
I
I
O
O
N
N
PRODUCTION D
A
TA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
Copyright © 2000
Rev. 1.0, 2005-08-10
WWW.Microsemi .COM
LX1672
Multiple Output LoadSHARE™ PWM
TM
®
APPLICATION CIRCUIT
+12V
L1
+
+5V
+5V
+
+
+5V
L2
+
+2.7V
+3.3V
1.40VDC
2.8VDC
HO2
LO2
PG2
LDGD
LDFB
LDDIS
DGND
AGND
DIS2
SS2
RF2
FB1
EO1
CS1
VS1
VCC
VCCL
PG1
LO1
HO1
VC1
VC2
FB2 SS1
EO2 DIS1
CS2 VS2
+5V
Figure 5 – Bi-Phase Operation with Phase 2 Output Tracking The Output of Phase 1.
A
A
P
P
P
P
L
L
I
I
C
C
A
A
T
T
I
I
O
O
N
N
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LX1672-03CLQ

Mfr. #:
Buy LX1672-03CLQ
Manufacturer:
Microchip / Microsemi
Description:
Switching Controllers
Lifecycle:
New from this manufacturer.
Delivery:
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