ADDC27008PB–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS (T = +25؇C, V = 270 V dc ؎0.5 V dc, unless otherwise noted; full temperature range is
C
IN
–55؇C to +90؇C; all temperatures are case and T is the temperature measured at the center of the package bottom.)
C
Case
Test
AD D C27008P B
P aram eter
Tem p
Level Conditions
Min Typ
Max
Units
INPUT CHARACT ERIST ICS
Steady State Operating Input Voltage Range1
Abnormal Operating Input Voltage Range
(Per MIL-ST D-704D)1
No Load Input Current
Disabled Input Current
Full
VI
IO = 1.25 A to 25 A Pulsed
180
160
270
350
V
Full
+25°C
+25°C
VI
VI
VI
IO = 1.25 A to 20 A Pulsed
440
100
5
V
mA
mA
45
1
OUT PUT CHARACT ERIST ICS2, 3
Output Voltage (VO)
+25°C
Full
Full
+25°C
+25°C
+25°C
Full
+25°C
+25°C
+25°C
I
IO = 1.25 A to 25 A, VIN = 180 V to 350 V dc
IO = 1.25 A to 25 A, VIN = 180 V to 350 V dc
IO = 1.25 A to 20 A, VIN = 160 V to 440 V dc
IO = 25 A Pulsed, VIN = 180 V to 350 V dc
VIN = 270 V dc, IO = 1.25 A to 25 A Pulsed
IO = 25 A, 5 kHz – 2 MHz BW
VIN = 180 V to 350 V dc, Pulsed
IO = 25 A, Open Remote Sense Connection
VO = 90% VOUT Nom
7.92 8.00
8.08
8.16
8.16
5
10
60
V
V
V
mV
mV
mV p-p
A
% VO nom
% IO max
A
VI
VI
VI
VI
I
VI
V
V
I
7.84
7.84
1
2.5
40
1.25
120
130
Line Regulation
Load Regulation
Output Ripple/Noise4
Output Current (IO)5
Output Overvoltage Protection
Output Current Limit
Output Short Circuit Current
25
45 mΩ ≤ RSHORT Circuit ≤ 60 mΩ
40
ISOLAT ION CHARACT ERIST ICS
Isolation Resistance
+25°C
+25°C
I
I
Input to Output or Any Pin to Case at 500 V dc
100
MΩ
DYNAMIC CHARACTERISTICS4
Step Changes In Load (min to max)
Step Changes In Load (max to min)
(Reference Section Entitled “Transient Response”)
(Reference Section Entitled “Response at End
of Pulse”)
Soft Start Turn-On Time
+25°C
+25°C
I
I
VI
I
IO = 25 A, From Inhibit High to Status High
6
10
ms
THERMAL CHARACTERISTICS
Efficiency
IO = 12.5 A
78
78
74
72.5
79
%
%
%
%
°C
PRELIMINARY
Full
IO = 12.5 A
IO = 25 A
IO = 25 A
+25°C
Full
+90°C
75
VI
V
TECHNICAL
Hottest Junction Temperature5
IO = 25 A
110
DATA
CONTROL CHARACTERISTICS
Clock Frequency
ADJUST (Pin 3) V ADJ
STATUS (Pin 4)
VOH
Full
+25°C
VI
I
IO = 2 A
0.85
3.1
0.99
3.3
MHz
V
3.2
+25°C
+25°C
I
I
IOH = 400 µA
IOL = 1 mA
2.4
4.0
0.15
V
V
VOL
0.7
VAUX (Pin 5)
VO (nom)
INHIBIT (Pin 6)
VIL
+25°C
I
IAUX = 5 mA, Load Current = 12.5 A
VIL = 0.5 V
14.9 15.15 15.4
V
+25°C
+25°C
+25°C
I
I
I
0.5
1.2
15
V
mA
V
IIL
VI (Open Circuit)
SYNC (Pin 7)6
VIH
+25°C
+25°C
+25°C
+25°C
I
I
I
V
4.0
V
µA
V
IIH
VIH = 7.0 V
IO = 20 A
150
ISHARE (Pin 8)
TEMP (Pin 9)
2.45 2.55
3.90
2.65
V
NOTES
1440 V dc upper limit rated for transient condition of up to 50 ms. 160 V dc lower limit rated for continuous operation during emergency condition. Steady state and
abnormal input voltage range require source impedance sufficient to insure input stability at low line. See sections entitled System Instability Considerations and Input
Voltage Range.
2Measured at the remote sense points.
3T ests performed at low continuous load and 200 W pulsed load. Unit does not regulate to zero load. Refer to section entitled Internal “Start-Up Circut”.
4CLOAD = 1,000 µF. Output ripple/noise measured at converter output; may be smaller at external load capacitance. Unit is stable for C
to 4,000 µF.
ranging from 500 µF
LOAD
5Refer to section entitled “Pulse Output Power vs. Pulse Length” for more information.
6Unit has internal pull-down; refer to section entitled Pin 7 (SYNC).
Specifications subject to change without notice.
–2–
REV. 0