For assistance or to order, call
(800) 531-5782
Revised 5/19/99
30 WATT ISOLATED
DC/DC CONVERTER
Application Notes
Mechanical Outline
Product Selector Guide
PT3320
dS
Isolate
W
IPs
Series
0
New 3
The PT3320 is a new series of high-
input voltage, 30 Watt, isolated DC to
DC converters housed in a unique
vertical or horizontal 19-pin SIP pack-
age. The 36 to 75V input range allows
easy integration into many distributed
power applications which utilize 48V bus
architectures.
The PT3320 series is available with
output voltages from 2V to 15V. The
output voltage is adjustable from 90 to
110% of nominal with the addition of an
external resistor. Other easy to use
features include an inhibit function and
differential remote sense which auto-
matically compensates for any voltage
drop from the converter to the load. The
PT3320 includes built in current limit,
short circuit protection and over-
temperature shutdown.
The PT3320 requires a 330碌F output
capacitor for proper operation.
Patent pending*
Pin-Out Information
Standard Application
V
O
Adjust
18
19
Features
Pin Function
10
11
12
13
14
15
16
17
18
19
-V
o
-V
o
-V
o
-Remote Sense
+V
o
+V
o
+V
o
+V
o
V
o
Adjust
+Remote Sense
Pin Function
1
+REMOTE SENSE
Do Not Use
Inhibit
Do Not Use
-V
in
-V
in
-V
in
+V
in
+V
in
+V
in
+V
IN
7-9
2
PT3320
4-6
13
10-12
14-17
+V
O
2
3
4
5
6
7
8
9
C
IN
Inhibit
-V
IN
+
Q
1
C
OUT
+
-V
O
LOAD
-REMOTE SENSE
C in = Optional 100碌F/100V electrolytic
C out = Required 330碌F electrolytic
Q
1
= NFET
Preliminary Specifications
Characteristics
(T
a
= 25擄C unless noted)
Output Current
PT3320 SERIES
Symbols
I
o
I
in standby
I
sc
V
in
鈭哣
o
Reg
line
Reg
load
V
n
t
tr
畏
茠
o
T
a
T
s
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Conditions
Over V
in
range
V
o
= 3.3V
V
o
= 5V
V
o
= 12V
Min
0.25
0.25
0.1
鈥?/div>
鈥?/div>
36.0
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
600
400
-40*
-40
鈥?/div>
鈥?/div>
鈥?/div>
1500
鈥?/div>
10
Typ
鈥?/div>
鈥?/div>
鈥?/div>
8
2xI
omax
48.0
鹵1.0
鹵0.5
鹵0.5
1.0
50
100
3.0
80
84
85
750
500
鈥?/div>
鈥?/div>
500
10
40
鈥?/div>
1200
鈥?/div>
Max
8.0
6.0
2.5
16
鈥?/div>
75.0
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
900
600
+85
+125
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Units
A
A
A
mA
A
V
%V
o
%V
o
%V
o
%V
o
mV
pp
碌Sec
%V
o
%
%
%
kHz
kHz
擄C
擄C
G鈥檚
G鈥檚
grams
VDC
pF
M鈩?/div>
鈥?/div>
30W Output Power
鈥?/div>
Input Voltage Range:
36V to 75V
鈥?/div>
1500 VDC Isolation
鈥?/div>
V
o
Inhibit
鈥?/div>
V
o
Adjust
鈥?/div>
Differential Remote Sense
鈥?/div>
Current Limit
鈥?/div>
Short-Circuit Protection
鈥?/div>
Over-T
emperature Shutdown
鈥?/div>
Undervoltage Lockout
鈥?/div>
Flexibile SIP Package
鈥?/div>
UL 1950, CSA 22.2 950
approval pending
鈥?/div>
Meets EN60950
On/Off Standby Current
Short Circuit Current
Input Voltage Range
Output Voltage Tolerance
Line Regulation
Load Regulation
V
o
Ripple/Noise
Transient Response
Efficiency
V
in
= 48V, Pin 1 = -V
in
V
in
= 48V
Over I
o
Range
Over V
in
Range
T
A
= -40擄C to +85擄C
Over V
in
range @ max I
o
10% to 100% of I
o
max
V
in
=48V, I
o
=I
o
max, V
o
>5V
V
in
=48V, I
o
=I
o
max, V
o
<5V
50% load change, 1A/碌Sec
V
o
over/undershoot, V
o
>5V
V
in
=48V, I
o
=6A, V
o
=3.3V
V
in
=48V, I
o
=6A, V
o
=5V
V
in
=48V, I
o
=2.5A, V
o
=12V
Over V
in
and I
o
V
in
= 48V @ max I
o
Airflow = 200 LFM
鈥?/div>
Per Mil-Std-883D, method 2002.3,
1mS, half-sine, mounted to a fixture
Per Mil-Std-883D, method 2007.2,
20-2000Hz, soldered in a PC board
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Materials meet UL 94V-0
V
o
<10V
V
o
>10V
Ordering Information
PT3321簍
PT3322簍
PT3323簍
PT3324簍
PT3325簍
PT3326簍
PT3327簍
PT3328簍
= 3.3V/8A
= 5.0V/6A
= 12.0V/2.5A
= 15.0V/2A
= 2.0V/8A
= 2.5V/8A
= 1.8V/8A
= 5.2V/6A
PT Series Suffix
(PT1234X)
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
Switching Frequency
Recommended Operating
Temperature Range
Storage Temperature
Mechanical Shock
Mechanical Vibration
Weight
Input/Output Isolation
Capacitance
Resistance
Flammability
Inhibit (pin 2)
N
A
C
(For dimensions and PC board layout,
see Package Styles 840 and 850.)
* Note:
This product is the
subject of one or more patents.
Other patents pending.
On**
2.5
鈥?/div>
15
VDC
Referenced to -V
in
Off
0
鈥?/div>
0.8
VDC
* At temperatures below 0擄C, the PT3320 series requires output capacitors with temperature stable dielectrics
such as tantalum or Oscon.
** If pin 2 is left open, the PT3320 will operate when input power is applied.
Power Trends, Inc.
27715 Diehl Road, Warrenville, IL 60555
(800) 531-5782
Fax: (630) 393-6902
http://www.powertrends.com
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