SLUU085 – November 2001
12
UCC3580EVM
Table 3. Conversion From Active Clamp to Hard-Switched Configuration: Remove List
Ref Des
Qty
Description
MFG
Size
Part Number
Capacitor
C6, C11
2
Ceramic, 0.1
µ
F, 50 V
Panasonic
5 mm
ECU–S1H104KBB
D5, D10
2
Switching, 75 mA, 75 V
DO–35
1N4148
Diode
D7, D11
2
Schottky, 1 A, 40 V
DO–41
1N5819
Diode
D16
1
Ultra Fast, 4 A, 400 V
DO–201AD
MUR460
Heatsink
HS2
1
For QA, 13 C/W. Remove as an as-
sembly with QA and all of the mounting
hardware attached to HS2.
Thermalloy
24.38 mm
6021PB
Choke
L3
1
E25/10/6–3F3 core, 10-pins, 16
µ
H
Century Magnetics
5.1X15.6 mm
CMI–2408
MOSFET
QA
1
400 V, 0.55
Ω
, 10 A (removed with
HS2)
IR
TO–220AB
IRF740
Transistor
Q2
1
NPN, 40 V, 200 mA
TO–226AA
2N3904
Transistor
Q4
1
PNP, 40 V, 200 mA
TO–226AA
2N3906
R5
1
30
Ω
, 1/4 w, 5%
10.16 mm
Resistor
R15
1
1/4 W, 4.7 k
Ω
, 5%
10.16 mm
Resistor
R23
1
1/4 W, 10 k
Ω
, 5%
10.16 mm
Gate
T1
1
xfmr, 8-pins
Coiltronics
2.5X8 mm
CTX08–14086–X1
Table 4. Conversion From Active Clamp to Hard-Switched Configuration: Add List
Ref Des
Qty
Description
MFG
Size
Part Number
Capacitor
C20
1
Ceramic disk, 390 pF, 1 kV
Panasonic
5 mm
ECK–D3A391KBN
Capacitor
C30
1
Polyester, 0.01
µ
F, 100 V
Panasonic
5 mm
ECQ–E1103KF
Diode
D8, D12
2
Ultra fast, 1 A, 600 V
DO–41
MUR160
Jumper
L3
1
Pin 1 to pin 4, 20AWG, insulated
14 mm
R9
1
5 W, wire, vertical, 1 k
Ω
, 5%
Ohmite
5 mm
TWM–5J1K0
Resistor
R25
1
5 W, wire, vertical, 6.8 k
Ω
, 5%
Ohmite
5 mm
TWM–5J6K8
Resistor
R31
1
5 W, wire, vertical, 4.7
Ω
, 5%
Ohmite
5 mm
TWM–5J4R7
