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3
AHF2812S
TABLE II. Electrical Performance Characteristics - Continued
Test
Symbol
Conditions
-55
°
C
≤
T
C
≤
+125
°
C
V
IN
= 28 V dc ±5%, C
L
= 0 unless
otherwise specified
Group A
Subgroups
Device
types
Limits
Unit
Min
Max
Output response to step
transient load changes 6/
VO
TLOAD
500 mA to/from 1000 mA
4
01
-300
+300
mV pk
5,6
-450
+450
0 mA to/from 500 mA
4
-500
+500
5,6
-750
+750
Recovery time, step
transient load changes
6/ 7/
TT
LOAD
500 mA to/from 1000 mA
4,5,6
01
100
μs
0 mA to 500 mA
4,5,6
01
1500
500 mA to 0 mA
4,5,6
10
ms
Output response to
transient step line changes
VO
TLINE
Input step 16 V to/from
40 V dc, I
OUT
= 1000 mA 4/ 8/
4,5,6
01
1500
mV pk
Recovery time transient
step line changes
TT
LINE
Input step 16 V to/from 40 V dc
I
OUT
= 1000 mA 4/ 7/ 8/
4,5,6
01
800
μs
Turn on overshoot
VTon
OS
I
OUT
= 0 and 1000 mA
4,5,6
01
600
mV pk
Turn on delay
Ton
D
I
OUT
= 0 and 1000 mA 9/
4,5,6
01
20
ms
Load fault recovery 4/ 9/
Tr
LF
4,5,6
01
20
ms
Weight
35
grams
Notes:
1/ Parameter guaranteed by line and load regulation tests.
2/ Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz.
3/ Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive load in excess of the maximum
limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on.
4/ Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the
limits specified in Table II.
5/ An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the
condition of maximum power dissipation.
6/ Load step transition time between 2 and 10 microseconds.
7/ Recovery time is measured from the initiation of the transient to where V
OUT
has returned to within ±1 percent of V
OUT
at 50 percent load.
8/ Input step transition time between 2 and 10 microseconds.
9/ Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 1)
while power is applied to the input
is unlimited.