PT42/4300 Series
3-7Watt48V-Input
Isolated DC/DC Converter
SLTS023B
(Revised 1/3/2002)
•
•
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•
•
•
•
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Wide Input Voltage Range: 38V to 72V high switching frequencies, thick-film technol-
83% Efficiency
ogy and a high degree of silicon integration.
The high reliability and very low package
height makes these converters ideal for
Telecom and Datacom applications requiring
input-to-output isolation with board spacing
down to 0.6”.
The PT4200 series is offered in a unique
molded through-hole or SMD-DIP package
with single output voltages of 2V, 3.3V, 5V,
and 12V, dual outputs of 5V, +5V/+3.3V, and
12V.
1,500 VDC Isolation
18 Pin DIP Package
3.5 Million Hour MTBF
Meets FCC/EN55022 Class A
UL and CSA approved
No External Components Required
Adjustable Output Voltage
The PT4200 series of isolated DC/DC
converters advance the state-of-the-art for
board-mounted converters by employing
Pin-Out Information
Package (Top View)
Pin Function
+Vout1
-Vout
+Vout2 or NC
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
+Vin
-Vin
1
2
Vout1
Vout return
NC
NC
3
Vout2 or N/C
Do not connect
Do not connect
Do not connect
Do not connect
Vadj
Vadj
NOR
RC
TOA
4
PT42/4300
5
Specifications
6
PT42/4300 SERIES
Characteristics
(Ta = 25°C unless noted)
7
Symbols
Conditions
Min
Typ
Max
Units
8*
9*
Output Current
Io
Over Vin range
Vo = 2V, 3.3V
Vo = 5V
0
0
0
—
—
—
1.5
1.2
0.6
A
A
A
Nominal output
voltage resistor
Vo = 12V
10
Turn-on/offinput
voltage adjust
Current Limit
Icl
Vin = 48V
Vo = 2V
Vo = 3.3V
Vo = 5V
Vo = 12V
2.0
1.7
1.4
0.7
—
—
—
—
3.3
3.3
2.4
1.2
A
A
A
A
11
12
13
14
15
16
17
18
Remote on/off
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
-Vin
On/Off Standby Current
Short Circuit Current
Iin standby
Isc
Vin = 48V, Pin 11 = -Vin
—
0.5
—
mA
Vin = 48V
Vo = 2V
—
—
—
—
2.8
2.4
1.9
1.2
—
—
—
—
A
A
A
A
Vo = 3.3V
Vo = 5V
Vo = 12V
Inrush Current
Iir
tir
Vin = 48V @ max Io
On start-up
—
—
0.6
1.0
1.0
5.0
A
mSec
(1)
Input Voltage Range
Vin
Over Io Range
Over Io Range
Io = 0A
38
—
48
4
72
—
V
+Vin
Output Voltage Tolerance ∆Vo
%Vo
* Please note that when the Vout
adjust is not used, pin 8 must be
connected to pin 9.
Idling Voltage
Vo
Vo = 2V
Vo = 3.3V
Vo = 5V
Vo = 12V
—
—
—
—
2.7
3.0
4.0
6.0
17
V
V
V
V
3.65
5.6
14.3
Ordering Information
Through-Hole
PT 4201A = 2V/1.5A
PT 4202A = 3.3V/1.5A
PT 4203A = 5V/1.2A
PT 4204A = 12V/0.6A
PT 4301A = 5V/1A
Ripple Rejection
Line Regulation
Load Regulation
Vo Ripple/Noise
Transient Response
RR
Over Vin range @ 120 Hz
Over Vin range @ max Io
10% to 100% of Io max
Vin= 48V, Io=Io max
—
—
—
—
60
0.5
3
—
—
—
70
dB
Regline
Regload
Vn
%Vo
%Vo
mVpp
30
ttr
50% load change
—
—
100
3.0
300
5.0
µSec
%Vo
Vo over/undershoot
Efficiency
η
Vin=48V, Io=1.5A, Vo=2V
Vin=48V, Io=1.5A, Vo=3.3V
Vin=48V, Io=1.2A, Vo=5V
Vin=48V, Io=0.6A, Vo=12V
—
—
—
—
73
79
80
83
—
—
—
—
%
%
%
%
PT 4302A = +5.2V/1A,
+3.3V/1A
PT 4303A = 12V/0.25A
Surface Mount
Switching Frequency
ƒo
Over Vin and Io
—
485
—
kHz
PT 4201C = 2V/1.5A
PT 4202C = 3.3V/1.5A
PT 4203C = 5V/1.2A
PT 4204C = 12V/0.6A
PT 4301C = 5V/1A
Operating Temperature
Ta
Vin = 48V @ max Io
-40
—
+85
°C
Free air convection, (40-60LFM)
Pin Temperature
Storage Temperature
Mechanical Shock
Tp
Ts
—
@ Pin1
—
—
—
—
95
°C
°C
-55
+125
Per Mil-STD-202F, Method 213B,
6mS half-sine, mounted to a PCB
—
—
50
10
—
—
G’s
G’s
PT 4302C = +5.2V/1A,
+3.3V/1A
Mechanical Vibration
—
Per Mil-STD-202F, Method 204D,
10-500Hz, mounted to a PCB
PT 4303C = 12V/0.25A
Weight
—
—
—
—
—
20
—
—
—
grams
VDC
(For dimensions and PC
board layout, see Package
Style 900.)
Isolation
—
1500
Flammability
Materials meet UL 94V-0
Notes: (1) The minimum input voltage is adjustable. See the specific application note on the PT4200/4205/4300 Series.
For technical support and more information, see inside back cover or visit www.ti.com
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