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PT4126C Datasheet(PDF) 2 Page - Texas Instruments

Part # PT4126C
Description  20-W 48-V Input Isolated DC/DC Converter
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PT4126C Datasheet(HTML) 2 Page - Texas Instruments

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For technical support and more information, see inside back cover or visit www.ti.com
PT4120 Series
20-W 48-V Input Isolated
DC/DC Converter
Specifications (Unless otherwise stated, Ta =25°C, Vin =48V, Cout =0µF, and Io =Iomax)
PT4120 SERIES
Characteristic
Symbol
Conditions
Min
Typ
Max
Units
Output Current
Io
Over Vin range
Vo = 15V
0.1 (1)
1.3
Vo = 12V
0.1 (1)
1.6
A
Vo =5.0V
0.1 (1)
4.0
Vo ≤ 3.3V
0.1 (1)
5.0
Input Voltage Range
Vin
Over Io Range
36.0
48.0
75.0
VDC
Set Point Voltage Tolerance
Vo tol
Vo≥5.0V
±1
±1.5
%Vo
Vo≤3.3V
±50
mV
Temperature Variation
Regtemp
–40°
≤Ta ≤ +85°C
±0.5
%Vo
Line Regulation
Regline
Over Vin range
Vo≥5.0V
±0.2
±1.0
%Vo
Vo≤3.3V
±7
±33
mV
Load Regulation
Regload
Over Io range
Vo
≥5.0V
±0.4
±1.0
%Vo
Vo≤3.3V
±13
±33
mV
Total Output Voltage Variation
∆Votot
Includes set-point, line load,
Vo≥5.0V
±2
%Vo
–40°
≤Ta ≤ +85°C
Vo≤3.3V
±67
mV
Efficiency
η
Vo = 15V
86
Vo = 12V
83
Vo =5.0V
82
%
Vo =3.3V
78
Vo =1.8V
67
Vo Ripple (pk-pk)
Vr
20MHz bandwidth
Vo ≥ 5.0V
0.5
%Vo
Vo ≤ 3.3V
15
mVpp
Transient Response
ttr
0.1A/µs, load step 50% to 100% Iomax
100
µs
∆Vtr
Vo over/undershoot
Vo ≥ 5.0V
±3.0
%Vo
Vo ≤ 3.3V
±150
mV
Short Circuit Current
Isc
2xIomax
A
Switching Frequency
ƒs
Over Vin range
Vo≥ 12.0V
600
650
700
kHz
Vo ≤ 5.2V
800
850
900
Under-Voltage Lockout
UVLO
31
V
Remote On/Off (Pin 1)
Referenced to –Vin (pin 2)
Input High Voltage
VIH
2.5
7.0 (2)
V
Input Low Voltage
VIL
–0.2
+0.8
Input Low Current
IIL
–10
µA
Standby Input Current
Iin standby
pins 1 & 2 connected
7
50
mA
Internal Input Capacitance
Cin
0.5
µF
External Output Capacitance
Cout
Between +Vo and –Vo
0
200
µF
Isolation Voltage
Input to output
1500
V
Capacitance
1100
pF
Resistance
10
——M
Operating Temperature Range
Ta
Over Vin range
-40
+85 (3)
°C
Storage Temperature
Ts
-40
+125
°C
Reliability
MTBF
Per Bellcore TR-332
4.0
106 Hrs
50% stress, Ta =40°C, ground benign
Mechanical Shock
Per Mil-Std-883D, method 2002.3,
500
G’s
1mS, half-sine, mounted to a fixture
Mechanical Vibration
Per Mil-Std-883D, method 2007.2,
15
G’s
20-2000Hz, soldered in a PC board
Weight
23
grams
Flammability
Materials meet UL 94V-0
Notes:
(1) The DC/DC converter will operate at no load with reduced specifications.
(2) The Remote On/Off (pin 1) has an internal pull-up, and if it is left open circuit the PT4120 will operate when input power is applied. Refer to the
application notes for interface considerations.
(3) See Safe Operating Area curves or contact the factory for the appropriate derating.


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