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Electrical Specifications
Unless otherwise specified: 36V < V IN < 75V, 0A < I OUT < 18A, -40 ? C < T CASE < 100 ? C (1)
Parameter
Symbol
Min
Typ
Max
Units
Conditions
Input Specifications
Input Voltage Range
V IN
36
48
75
Vdc
Input dv/dt
(1)
V INDVDT
1.0
V/μs
V IN = 75V
Input Under-Voltage Turn-on
Input Under-Voltage Turn-off
Input Under-Voltage Hysteresis
Input Over-Voltage Turn-on
Input Over-Voltage Turn-off
V UVON
V UVOFF
V UVH
V OVON
V OVOFF
32.5
30.5
75.7
77.7
34
32
2
78
80
35
33
81
82.3
Vdc
Vdc
Vdc
Vdc
Vdc
I O = 1.8A
I O = 1.8A
I O = 1.8A
I O = 1.8A
I O = 1.8A
Input Over-Voltage Hysteresis
V OVH
2
I O = 1.8A
Input Quiescent Current
Input Idling Power
Input Standby Power
Input Current Full Load
I Q
P IDLE
P SBY
I IN
2.5
4.0
0.225
1.4
mAdc
W
W
Adc
V IN = 48V, ENABLE = 0V
V IN = 48V, I OUT = 0A
V IN = 48V, ENABLE = 0V
T CASE = 100 ? C I OUT = 18A ? FL =
86.5% typical V IN =48V
L IN = 2μH C IN = 47μF 100V
Input Reflected Ripple Current
I INRR
10
mApp
electrolytic + 2x1μF 100V X7R
ceramic
Recommended Ext Input
Capacitance
C IN
49
μF
C IN = 47μF 100V electrolytic +
2x1μF 100V X7R ceramic
C IN = Cbulk + Chf
Output Specifications
Output Voltage Set Point
V OUT
3.3
Vdc
I OUT = 9A
Total Output Accuracy
V OA
-3
+3
%
Line Regulation
Load Regulation
V RLI
V RLO
0.25
1.5
%
%
V IN = 36V-75V, I OUT = 18A
V IN = 48V, I OUT = 0-18A
Output Voltage Trim Range
Output Current Range
V OADJ
I OUT
-10%
10%
18
%
Adc
Over Current Protection
I OCP
18.8
26
33
Adc
Efficiency – Full Load
Efficiency – Half Load
Output OVP Set Point
Output Ripple Voltage
Switching Frequency
Output Turn-on Delay Time
? FL
? HL
V OVP
V ORPP
f SW
t ONDLY
84.5
86.5
84.5
4.1
75
900
80
%
%
Vdc
mVpp
kHz
ms
T CASE = 100 ? C, V IN =48V
T CASE = 100 ? C, V IN =48V
C OUT = 12x10μF 10V X7R DC-
20MHz using PI3101-EVAL1
V IN = V UVON to ENABLE = 5V
Picor Corporation ? picorpower.com
PI3101-00-HVIZ
Rev 1.1, April 29 th , 2010
Page 4 of 18
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