鈥?/div>
Adjustable Output Voltage
Application Notes
Mechanical Outline
Product Selector Guide
Revised 5/15/98
Power T
rends鈥?PT4205 series of isolated DC to
DC converters advance the state-of-the-art for board-
mounted converters by employing high switching
frequencies, thick-film technology and a high degree
of silicon integration. The high reliability and very low
package height makes these converters ideal for
T
elecom and Datacom applications requiring input-
to-output isolation with board spacing down to 0.6鈥?
The PT4205 series is offered in a unique molded
through-hole or SMD-DIP package with single
output voltages of 3.3V and 5V
.
Standard Application
+Vout
-Vout
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
-Vin
+Vin
Pin-Out Information
Pin
1
Function
V
out
V
out
return
Do not connect
Do not connect
Do not connect
Do not connect
Sync input
V
adj
Nominal output
voltage resistor
Turn-on/off input
voltage adjust
Remote on/off
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
+Vin
-Vin
NC
Sync
Vadj
NOR
NC
2
3
4
5
Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
Current Limit
On/Off Standby Current
Short Circuit Current
Inrush Current
Input Voltage Range
Output Voltage Tolerance
Idling Voltage
Ripple Rejection
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
Efficiency
Switching Frequency
Pin Temperature
Operating Temperature
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
Isolation
Flammability
Symbols
I
o
I
cl
I
in standby
I
sc
I
ir
t
ir
V
in
鈭哣
o
V
o
RR
Reg
line
Reg
load
V
n
t
tr
畏
茠
o
T
p
T
a
T
s
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Conditions
PT4205
RC
TOA
PT4205 SERIES
Min
V
o
= 3.3V
V
o
= 5V
V
o
= 3.3V
V
o
= 5V
V
o
= 3.3V
V
o
= 5V
0
0
2.0
1.3
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
18**
鈥?/div>
V
o
= 3.3V
V
o
= 5V
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
V
o
=3.3V
V
o
=5V
鈥?/div>
鈥?/div>
520
鈥?/div>
-40
-55
鈥?/div>
鈥?/div>
鈥?/div>
1500
Typ
鈥?/div>
鈥?/div>
鈥?/div>
1.6
0.5
2.5
2.0
0.6
1.0
24
鹵4
3.65
5.6
60
鹵0.5
鹵3
30
100
3.0
79
84
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
50
10
20
鈥?/div>
Max
1.8
1.2
3.0
2.4
鈥?/div>
鈥?/div>
鈥?/div>
1.0
2.0
36
鈥?/div>
4.0
6.0
鈥?/div>
鈥?/div>
鈥?/div>
70
300
5.0
鈥?/div>
鈥?/div>
688
+95
+85
+125
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
A
A
A
mA
A
A
A
mSec
V
%V
o
V
V
dB
%V
o
%V
o
mV
pp
碌Sec
%V
o
%
%
kHz
擄C
擄C
擄C
G鈥檚
G鈥檚
grams
VDC
Over V
in
range
V
in
= 24V
6
7
8*
9*
10
11
12
13
14
15
16
17
18
V
in
= 24V, Pin 11 = -V
in
V
in
= 24V
V
in
= 24V @ max I
o
On start-up
Over I
o
Range
Over I
o
Range
I
o
= 0A
Over V
in
range @ 120 Hz
Over V
in
range @ max I
o
10% to 100% of I
o
max
V
in
=24V, I
o
=I
o
max
50% load change
V
o
over/undershoot
V
in
=24V, I
o
=1.8A,
V
in
=24V, I
o
=1.2A,
Over V
in
and I
o
@ Pin 1
V
in
= 24V @ max I
o
Free air convection, (40-60LFM)
鈥?/div>
Per Mil-STD-202F, Method 213B,
6mS, half-sine, mounted to a PCB
Per Mil-STD-202F, Method 204D,
10-500Hz, mounted to a PCB
鈥?/div>
鈥?/div>
Materials meet UL 94V-0
* Please note that when the
Vout adjust is not used, pin 8
must be connected to pin 9.
Ordering Information
Through-Hole
PT4205A
= 3.3V/1.8A
PT4206A
= 5V/1.2A
Surface Mount
PT4205C
= 3.3V/1.8A
PT4206C
= 5V/1.2A
** Minimum input voltage is adjustable - See application note.
(For dimensions and PC
board layout, see Package
Style 900.)
60
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
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