SLUU085 – November 2001
8
UCC3580EVM
5
Application Drawings and Parts List
5.1
Active Clamp Configuration
UDG–00014
R7
3.92k
R6
5.62k
C14
1
µ
F
50V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IC1
UCC3580–
4
DELAY
LINE
VDD
OUT1
PGND
OUT2
CLK
GND
SHDN
SS
REF
EAIN
EAOUT
OSC1
OSC2
RAMP
C9
680pF
C8
470pF
R8
33.2k
R14
33.2k
R13
1.62k
TP12
EAOUT
C17
0.047
µ
F
R17
130k
R10
20.0k
C12
0.01
µ
F
R1
1 51
1k
R16
3.32k
D1
1
1N5819
C18
2200pF
R21 1k
R3
240k
1W
C10
330pF
500V
D7
1N5819
D6
1N5819
C15
0.1
µ
F
R4 47k
2W
W1
Q3
2N3904
R19
15
D9
1N5819
Q1
2N3906
R18
4.7k
R12
10k
QM
IRF740
HS1
R24
0.10
3W
M.E.
TP15
CSENSE
6
5
4
TP14
DRAIN
L3 16
µ
H
2 4
D16
MUR460
TP9
PRI GND
C19
100
µ
F
D14
1N4744
R22 20
C24
0.1
µ
F
D15
MUR120
3
4
3 TURNS
1
2
C21
0.1
µ
F
400V
R23
10k
R15
4.7k
Q2
2N3904
Q4
2N3906
D10 1N4148
TP1
1
OUT2
T1
D5
1N4148
C6
0.1
µ
F
R5 30
C1
1 0.1
µ
F
TP10
OUT1
TP16
SOURCE
TP18
DRAIN
C25
0.068
µ
F
400V
TP17
BULK
24
TURNS
158
µ
H
TP20
BULK
C7
1000
µ
F
TP19
TPI GND
+
R1
68k
1W
D2
1N5406
D1
1N5406
D4
1N5406
D3
1N5406
C2
4700pF
250V
C1
4700pF
250V
J1
–
1
CHASSIS
1
4
5
8
C4 0.1
µ
F
250V
C5 0.1
µ
F
250V
L1
18
µ
H
R2
470k
C3 0.1
µ
F
250V
F1
3A
J1
–
3
LINE
J1
–
2
NEUTRAL
13
14
3 TURNS
2
C34
180
µ
F
C33
180
µ
F
C32
180
µ
F
C31
180
µ
F
++++
R31
NOT
USED
HS3
D17
MBRF2545CT
C30
NOT
USED
TP8
ANODE
TP6
CA
THODE
TP7
SNUB
TP12
+12V
TP1
GND2
TP4
TP5
R32
20
C29
470pF
R29
3.01k
R27
60.4k
C28
4.7nF
R30
54.9k
C26
220pF
IC3
TL431
R28
14.3k
1
3
2
C27
1.0nF 250V
AC
TP3
J2
–
2
RETURN
J2
–
1
+12V
IC2
CNY17
–
2
1
2
AC INPUT
1
15V
60Hz
CAUTION:
LINE VOL
T
AGE
3
1
PRIMAR
Y
SECONDAR
Y
T2
L2
2mH
QA
IRF740
HS2
D13 1N4148
TP13
PRI GND
R26
3.01k
TH1
HIGH
TEMPERA
TURE
–
SEE EVM W
ARNINGS
AND RESTRICTIONS
HIGH
TEMPERA
TURE
–
SEE EVM W
ARNINGS
AND RESTRICTIONS
HIGH
TEMPERA
TURE
–
SEE EVM W
ARNINGS
AND RESTRICTIONS
Note: High-temperature component. See EVM Warnings and Restrictions at the front of this document.
Figure 2. Flyback Converter Populated for Active Clamp Operation
