PT4240 Series
10-W Low-Profile 24V-Input
Isolated DC/DC Converter
Specifications (Unless otherwise stated, Ta =25°C, Vin =24V, Cin =0µF, Cout =0µF, and Io =Iomax)
PT4240 SERIES
Typ
Characteristic
Symbol
Conditions
Min
Max
Units
(1)
(1)
(1)
Output Current
Io
Over Vin range
Vo ≤3.3V
Vo =5.0V
Vo = 12V
0.1
0.1
0.1
—
—
—
3
2
0.85
Input Voltage Range
SetPointVoltageTolerance
TemperatureVariation
Line Regulation
Load Regulation
TotalOutputVoltageVariation
Vin
Over Io Range
18.0
—
—
—
—
24.0
1
0.2
1
36.0
2
—
—
—
VDC
%Vo
%Vo
mV
V
o tol
Regtemp
Regline
Regload
∆Votot
–40° ≤Ta ≤ +85°C, Io =Iomin
Over Vin range
Over Io range
Includes set-point, line, load,
–40° ≤Ta ≤ +85°C
5
mV
—
1.5
3
%Vo
Efficiency
η
Vo = 12V
Vo = 5.0V
Vo = 3.3V
Vo = 2.5V
Vo = 1.8V
Vo = 1.5V
Vo = 1.3V
—
—
—
—
—
—
—
86
84
80
77
72
70
64
—
—
—
—
—
—
—
%
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
Vo ≤5.0V
Vo = 12V
—
—
—
—
—
50
—
—
—
—
—
mVpp
µs
100
TransientResponse
ttr
1A/µs load step, 50% to 100% Iomax
Vo over/undershoot
75
150
350
Vo ≤5.0V
Vo = 12V
∆Vtr
mV
Output Voltage Adjust
Current Limit Threshold
Switching Frequency
Vadj
Ilim
ƒs
Vo ≥2.5V
10
—
250
—
—
—
—
350
—
%Vo
%Iomax
kHz
V
Vin =18V, ∆Vo = –1%
Over Vin range
150
300
16
Under-Voltage Lockout
UVLO
Remote On/Off (Pin 1)
Input High Voltage
Input Low Voltage
Referenced to –Vin (pin 3)
pins 1 & 3 connected
(3)
VIH
VIL
IIL
Iin standby
Cin
Cout
4.5
—
—
–0.5
1
0.66
—
—
Open
+0.8
—
—
—
V
–0.2
Input Low Current
—
—
—
mA
mA
µF
Standby Input Current
Internal Input Capacitance
External Output Capacitance
(5)
(5)
Vo ≤5.0V
0
1000
330
µF
Vo = 12V
0
Isolation Voltage
Capacitance
Resistance
Input–output/input–case
Input to output
Input to output
1500
—
10
—
—
—
—
V
1,100
—
pF
MΩ
(4)
OperatingTemperatureRange
StorageTemperature
Reliability
Ta
Over Vin range
—
-40
-40
—
—
+85
°C
°C
T
+125
s
MTBF
Per Bellcore TR-332
6
4.7
—
—
—
—
10 Hrs
50% stress, Ta =40°C, ground benign
Mechanical Shock
—
Per Mil-Std-883D, method 2002.3,
1mS, half-sine, mounted to a fixture
500
G’s
Mechanical Vibration
—
Mil-Std-883D, Method 2007.2
(6)
—
—
20
—
—
G’s
20-2000Hz, all case styles soldered to PC
Weight
Flammability
—
—
—
20
grams
Materials meet UL 94V-0
Notes: (1) The DC/DC converter will operate at no load with reduced specifications.
(2) The maximum output current reduces the output power of the following devices to less than 10W:-
PT4245 =7.5W; PT4241 =5.4W; PT4246 =4.5W; PT4247 =3.9W.
(3) The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the converter will operate when input power is applied. The open-circuit
voltage is typically 5V. Refer to the application notes for interface considerations.
(4) See Safe Operating Area curves or contact the factory for the appropriate derating.
(5) An output capacitor is not required for proper operation.
(6) The case pins on through-hole pin configurations (N & A) must be soldered. For more information see the applicable package outline drawing.
For technical support and more information, see inside back cover or visit www.ti.com
TI [ TEXAS INSTRUMENTS ]
