= 28 V dc 0.5 V dc, unless otherwise noted; full temperature range is
–55 C to +90 C; all temperatures are case and T
C
is the temperature measured at the center of the package bottom.)
Test
Level Conditions
VI
VI
I
VI
VI
I
VI
VI
VI
VI
I
VI
V
V
I
I
I
I
O
= 1.25 A to 25 A Pulsed
I
O
= 1.25 A to 25 A Pulsed
ADDC02808PB
Min Typ
Max
18
16
50
28
40
50
55
90
2
8.08
8.16
8.16
5
10
30
25
Units
V
V
V
mA
mA
V
V
V
mV
mV
mV p-p
A
% V
O
nom
% I
O
max
A
MΩ
52.5
45
1
8.00
Line Regulation
Load Regulation
Output Ripple/Noise
4
Output Current (I
O
)
5
Output Overvoltage Protection
Output Current Limit
Output Short Circuit Current
ISOLATION CHARACTERISTICS
Isolation Resistance
DYNAMIC CHARACTERISTICS
4
Step Changes In Load (min to max)
Step Changes In Load (max to min)
Soft Start Turn-On Time
THERMAL CHARACTERISTICS
Efficiency
I
O
= 1.25 A to 25 A, V
IN
= 18 V to 40 V dc
I
O
= 1.25 A to 25 A, V
IN
= 18 V to 40 V dc
I
O
= 1.25 A to 20 A, V
IN
= 16 V to 50 V dc
I
O
= 25 A Pulsed, V
IN
= 18 V to 40 V dc
V
IN
= 28 V dc, I
O
= 1.25 A to 25 A Pulsed
I
O
= 25 A, 5 kHz – 2 MHz BW
V
IN
= 18 V to 40 V dc, Pulsed
I
O
= 25 A, Open Remote Sense Connection
V
O
= 90% V
OUT
Nom
7.92
7.84
7.84
1
2.5
10
1.25
125
130
40
Input to Output or Any Pin to Case at 500 V dc
(Reference Section Entitled “Transient Response”)
(Reference Section Entitled “Response at End
of Pulse”)
I
O
= 25 A, From Inhibit High to Status High
I
O
= 12.5 A
I
O
= 12.5 A
I
O
= 12.5 A
I
O
= 25 A
I
O
= 25 A
I
O
= 25 A
I
O
= 25 A
I
O
= 2 A
I
OH
= 400
µA
I
OL
= 1 mA
I
AUX
= 5 mA, Load Current = 12.5 A
77.5
77.5
76
73.5
73.5
71
100
+25°C
+25°C
Min
Max
+25°C
Min
Max
+90°C
Full
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
+25°C
I
I
VI
VI
I
VI
VI
V
VI
I
I
I
I
I
I
I
I
I
I
V
6
10
ms
80
76
Hottest Junction Temperature
5
CONTROL CHARACTERISTICS
Clock Frequency
ADJUST (Pin 3) V ADJ
STATUS (Pin 4)
V
OH
V
OL
V
AUX
(Pin 5)
V
O
(nom)
INHIBIT (Pin 6)
V
IL
I
IL
V
I
(Open Circuit)
SYNC (Pin 7)
6
V
IH
I
IH
I
SHARE
(Pin 8)
TEMP (Pin 9)
110
0.85
3.1
2.4
0.99
3.3
%
%
%
%
%
°C
MHz
V
V
V
V
V
mA
V
V
µA
V
V
3.2
4.0
0.15
0.7
15.65
0.5
1.2
15
14.65 15.15
V
IL
= 0.5 V
4.0
V
IH
= 7.0 V
I
O
= 20 A
2.45
2.55
3.90
175
2.65
NOTES
1
50 V dc upper limit rated for transient condition of up to 50 ms. 16 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.
2
Measured at the remote sense points.
3
Unit regulates output voltage to zero load; tests performed at low continuous load and 200 W pulsed load.
4
C
LOAD
= 1,000
µF.
Output ripple/noise measured at converter output; may be smaller at external load capacitance. Unit is stable for C
LOAD
ranging from 500
µF
to
4,000
µF.
5
Refer to section entitled “Pulse Output Power vs. Pulse Length” for more information.
6
Unit has internal pull-down; refer to section entitled Pin 7 (SYNC).
嵌入式系统
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