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PT4100—24V
15 Watt Isolated DC-DC Converter
SLTS020A
(Revised 1/15/2001)
Input Voltage Range:
18V to 40V
1500 VDC Isolation
Low Profile
Current Limit
Short-Circuit Protection
Over-Temperature Shutdown
UL1950 recognized
CSA 22.2 950 certified
Meets EN60950
Ordering Information
Through-Hole
PT4104A = 5 Volts
PT4105A = 12 Volts
PT4106A = 15 Volts
Surface Mount
PT4104C = 5 Volts
PT4105C = 12 Volts
PT4106C = 15 Volts
(For dimensions and PC
board layout, see Package
Style 710.)
Pin-Out Information
Pin
Function
1
Remote
ON/OFF
2-Vin
3+Vin
4-Vout
5+Vout
6
Do not connect
Standard Application
+Vout
-Vout
-Vin
+Vin
3
24
5
On/Off
1
PT4100
Specifications
Characteristics
PT4100—24V SERIES
(T
a=25
°C unless noted)
Symbols
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range,
Vo = 5V
0
—
3.0
Vo = 12V
0
—
1.25
A
Vo = 15V
0
—
1.0
Current Limit
Icl
Vin = 18V,
Vo = 5V
—
4.0
—
Vo = 12V
—
1.75
—
A
Vo = 15V
—
1.4
—
On/Off Standby Current
Iin standby
Vin = 24V, Pin 1 = -Vin
—7
10
mA
Short Circuit Current
Isc
Vin = 24V,
Vo = 5V
—
6.25
—
Vo = 12V
—
2.5
—
A
Vo = 15V
—
2.0
—
Inrush Current
Iir
Vin = 24V @ max Io
—
1.0
2.0
A
tir
On start-up
—
1.0
5.0
mSec
Input Voltage Range
Vin
Io = 0.1 to max Io
18.0
24.0
40.0
V
Output Voltage Tolerance
Vo
Over Vin Range
TA= -40°C to +85°C
—
±1.0
±2.0
%Vo
Line Regulation
Regline
Over Vin range @ max Io
—
±0.2
±1.0
%Vo
Load Regulation
Regload
10% to 100% of Io max
—
±0.4
±1.0
%Vo
Vo Ripple/Noise
Vn
Vin=24V, Io=3.0A, Vo=5V
—
75
100
Vin=24V, Io=1.25A, Vo=12V
—
75
150
mVpp
Vin=24V, Io=1.25A, Vo=15V
—
100
200
Transient Response
ttr
50% load change
—
125
200
Sec
Vo over/undershoot
—
3.0
5.0
%Vo
Efficiency
η
Vin=24V, Io=3.0A, Vo=5V
—
82
—
Vin=24V, Io=1.25A, Vo=12V
—
82
—
%
Vin=24V, Io=1A, Vo=15V
—
83
—
Switching Frequency
o
Over Vin and Io,
Vo=5V
800
850
900
kHz
Vo=12V/15V
600
650
700
Recommended Operating
Ta
Vin = 24V @ max Io
-40
—
+85 (1)
°C
Temperature Range
Free air convection, (40-60LFM)
Thermal Resistance
θ
ja
Free air convection, (40-60LFM)
—
12
—
°C/W
Case Temperature
Tc
@ Thermal shutdown
—
100
°C
Storage Temperature
Ts
-40
—
110
°C
Mechanical Shock
—
Per Mil-STD-202F, Method 213B,
—50
—
G’s
6mS, Half-sine, mounted to a PCB
Mechanical Vibration
—
Per Mil-STD-202F, Method 204D,
—10
—
G’s
10-500Hz, Soldered in a PCB
Weight
—
28
—
grams
Isolation
—
1500
—
V
Capacitance
—
1100
—
pF
Resistance
—
10
—
M
Flammability
—
Materials meet UL 94V-0
Remote On/Off
On (2)
Referenced to –Vin
2.5
7.0
V
Off
0
0.8
Notes: (1) See thermal derating curves.
(2) If pin2 is left open, the converter will operate when input power is applied.
The PT4100—24V series of dc/dc
converters provide 18 Watts/in3 of isolated
power in a single low-profile module. De-
signed to operate from a standard 24V
telecom bus, these modules employ
switching frequencies of up to 850kHz,
planar magnetics, and surface-mount con-
struction. They are designed for Telecom,
Industrial, Computer, Medical, and other
distributed power applications that require
input-to-output isolation.