
2
www.irf.com
ATO28XXT Series
Specifications
T
CASE = -55°C to +85°C, VIN = +28V ± 5% unless otherwise specified
Notes to Specifications
1.
Tested at each output.
2.
Parameter guaranteed by line and load regulation tests.
3.
At least 20 percent of the total output power should be taken from the (+5V) main output.
4.
Bandwidth guaranteed by design. Tested for 20KHz to 2.0MHz.
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.
Above 85
°C case temperature, derate output power linearly to 0 at 115°C case.
Input voltage
-0.5V to +50VDC
Power Output
Internally limited, 17.5W typical
Soldering temperature
300°C for 10 seconds
Temperature Range6
Operating case temperature
-55°C to +115°C
Storage case temperature
-65°C to +135°C
Absolute Maximum Ratings
ATO2812T
ATO2815T
TEST
SYMBOL
Condition
-55
°C ≤ TC ≤ +85°C, VIN = 28 VDC ±5%, CL=0
unless otherwise specified
Min
Max
Min
Max
Units
STATIC
CHARACTERISTICS
OUTPUT
Voltage
1
VOUT
IOUT = 0 (main)
IOUT = 0 (dual)
1
TC = 25
°C
Over Temp
TC = 25
°C
Over Temp
4.95
4.90
±11.88
±11.76
5.05
5.10
±12.12
±12.24
4.95
4.90
±14.85
±14.70
5.05
5.10
±15.15
±15.30
V
Current
1,2,3
IOUT
VIN = 16, 28, and 40 VDC (main)
0.0
2000
0.0
2000
mA
VIN = 16, 28, and 40 VDC (dual)
1
VIN = 16, 28, and 40 VDC (dual)
0.0
±208
80
0.0
±167
80
mA
mVp-p
Ripple Voltage
1,4
VRIP
BW = DC to 2 MHz (main)
VIN = 16, 28, and 40 VDC
BW = DC to 2 MHz (dual))
40
mVp-p
Power
1,2,3
POUT
VIN = 16, 28, and 40 VDC (main)
(+dual)
(-dual)
(total)
10
2.5
15
10
2.5
15
W
REGULATION
Line 1,3
Load 1,3
VRLINE
VRLOAD
VIN = 16, 28, and 40 VDC
IOUT = 0, 1000, 2000mA (main)
VIN = 16, 28, and 40 VDC (dual)
IOUT = 0,
±84, ±167mA (dual)
VIN = 16, 28, and 40 VDC
IOUT = 0, 1000, 2000mA (main)
VIN = 16, 28, and 40 VDC
IOUT = 0,
±84, ±167mA (dual)
TC = 25
°C
Over Temp
25
±30
±60
50
±60
25
±35
±75
50
±75
mV
INPUT
Current
Ripple Current 4
IIN
IRIP
IOUT = 0, Inhibit (pin 8)
Tied to input return (pin 10)
IOUT = 0, inhibit (pin 2) = open
IOUT = 2000 mA (main)
IOUT =
±167mA (dual)
BW = DC to 2MHz
15
40
50
15
40
50
mA
mAp-p
EFFICIENCY
EFF
IOUT = 2000mA (main)
IOUT =
±167mA (dual)
TC = 25
°C
76
%
ISOLATION
ISO
Input to output or any pin to
case (except pin 7) at 500 VDC
TC = 25
°C
100
M
Load Fault
Power Dissipation
3
PD
Overload
Short Circuit
TC = 25
°C
8.0
6.0
8.0
6.0
W
Switching Frequency
FS
IOUT = 2000mA (main)
IOUT =
±167mA (dual)
225
275
225
275
KHz
Inhibit Open Circuit
Voltage
VOI
9.0
13
9.0
13
V