ON Semiconductor MC33067, Manual

Page: 13 / 16

MC34067, MC33067
http://onsemi.com
13
Inductance = 1.8
H
μ
MBR2535
330pF 100pF
16k
1.6k
330pF
1500pF
220pF
0.01
10k
1.1k
2.7k 18k
10
V CC
15
9 1 2
16
3 6 8 7
11
4
Reference
5
14 13 12 10
470pF
470
3.9k
1N5819
T2
MTP33N10E
100
1.0 1.0
T3
1.0k 1.0k
100
1N5819 x 4
V
in
500pF
51/0.5W
CTL
2
30
V
out
L1
L2
Figure 22.
Application Circuit
Line Regulation Load Regulation Output Ripple Ef
ficiency
Test
Conditions
Results
V
in
= 40 V to 56 V
, I
O
=15 A
V
in
= 48 V
, I
O
= 10
A
to 15
A
V
in
O
= 48 V
, I
= 15
A, f
20 mV =
switch
= 1.0 MHz
V
in
O
= 48 V
, I
= 10
A, f
switch
= 1.7 MHz
V
in
O
= 48 V
, I
= 15
A, f
switch
= 1.0 MHz
±
0.198%
4.0 mV =
±
0.039%
25 mV
p
−
p
83.5% 84.2%
T1 =
Primary: 12 turns #48
A
WG (1300 strands litz wire)
Secondary: 6 turns center tapped #48
A
WG (1300 strands litz wire)
Core: Philips 3F3 4312 020 4124 Bobbin: Philips 4322 021 3525 Primary Leakage Inductance = 1.0
H
μ
T2 =
All windings: 8 turns #36
A
W
G
Core: Philips 3F3 EP7
−
3F3
Bobbin: Philips EP7PCB1
−
6
T3 =
Coilcraft D1870 (100 turns)
L1 =
2 turns #48
A
WG (1300 strands litz wire)
Core: Philips 3F3 EP10
−
3F3
Bobbin: Philips EP10PCB1
−
8
L2 =
5 turns #48
A
WG (1300 strands litz wire)
Core: 0.5 Inductance = 100 nH
″
diameter air code
Heatsinks =
A
AVID Engineering Inc. 533402B02552 with clip
MC34067
−
5803
Insulators =
Berquist Sil
−
Pad 1500
5.0 V
36 V to 56 V
T1
1N5819
500pF
51/0.5W
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