AHM85 Series
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GREEN
POWER
Medical & IT Safety Approvals
Energy Star Level V
CEC 2008 & EISA 2007 Compliant
IP22 Environmental Rating
Compact Format 5.90”x 2.52”x 1.45”
<0.5 W Standby Power
85 W - Convection Cooled Ratings
Class I & Class II Models
0 ºC to +60 ºC Operation
Very Low Earth Leakage Current
3 Year Warranty
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The AHM85 series of medical external power supplies is fully approved to international medical safety standards. It has been designed
with very high efficiency and low standby power, enabling it to meet the latest envirnomental legislation. The unit has a fully sealed
enclosure complying with IP22 and a smooth surface finish making it easier to wipe down in a clinical setting. With approvals for class
I and II the product is suitable for hospital, home healthcare and portable medial device applications.
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Models and Ratings - Convection-cooled
Output Power
85 W
85 W
85 W
85 W
85 W
85 W
85 W
85 W
Output Voltage V1
12.0 VDC
15.0 VDC
19.0 VDC
24.0 VDC
12.0 VDC
15.0 VDC
19.0 VDC
24.0 VDC
Max Output Current
7.08 A
5.67 A
4.47 A
3.54 A
7.08 A
5.67 A
4.47 A
3.54 A
Peak
(2)
Model Number
(1)
AHM85PS12
AHM85PS15
AHM85PS19
AHM85PS24
AHM85PS12C2
AHM85PS15C2
AHM85PS19C2
AHM85PS24C2
Notes:
1. Models with suffix ‘C2’ have a Class II equipment protection classification.
2.
For optional input connector retention clip, add suffix ‘-A’ to the model number
e.g. AHM85PS24C2-A.
Input Characteristics
Characteristic
Input Voltage - Operating
Input Frequency
Power Factor
Input Current - No Load
Input Current - Full Load
Inrush Current
No Load Input Power
Earth Leakage Current
Input Protection
Minimum
80
47
Typical
115/230
Maximum
264
Units
VAC
Hz
A
A
A
W
µA
mA
EN61000-3-2 class A & D compliant & Energy Star Compliant
115/230 VAC
115/230 VAC
230 VAC cold start, 25 ºC
115/230 VAC
115 V 60 Hz/230 V 50 Hz (Typ.), 264 VAC/60 Hz (Max.)
115/230 VAC/400 Hz
Notes & Conditions
Full power 90 VAC to 264 VAC. Derate output power linearly by
20% from 90 VAC to 80 VAC.
50/60
63
>0.9
0.05/0.09
0.8/0.4
60-80
120
0.3/0.4
0.5
50/85
180
0.3/0.6
T2.5A/250 V internal fuse in both lines
Output Characteristics
Characteristic
Output Voltage - V1
Output Voltage Adjustment
Minimum Load
Start Up Delay
Hold Up Time
Drift
Line Regulation
Load Regulation
Transient Response - V1
Over/Undershoot - V1
Ripple & Noise
13.2
Overvoltage Protection
16.5
21.0
26.4
115.0
8.5
Overload Protection
6.8
4.9
4.2
Short Circuit Protection
Temperature Coefficient
Overtemperature Protection
0.05
%/˚C
°C
Connected to transformer. Auto reset.
3
<1
125
18
22
28
33
175
12.0
9.6
7.6
6.0
A
%
VDC
1.5
0
200/100
15
±0.2
±0.5
±3
5
Minimum
12
Typical
Maximum
48
Units
VDC
%
A
ms
ms
%
%
%
%
%
% pk-pk
%
20 MHz bandwidth with external circuit (see fig.3-6)
Vnom, Recycle AC to reset
AHM85PS12 & C2
AHM85PS15 & C2
AHM85PS19 & C2
AHM85PS24 & C2
I nom, Auto reset
AHM85PS12 & C2
AHM85PS15 & C2
AHM85PS19 & C2
AHM85PS24 & C2
Continuous, trip & restart (hiccup mode)
115/230 VAC full load (see fig.1)
115/230 VAC full load (see fig.2)
After 20 min warm up
90-264 VAC (50% load)
0f50g100% load.
Recovery within 1% in less than 500 µs for a 50-75% and 75-
50% load step
Notes & Conditions
See Models and Ratings table
No user adjustment
2
xppower.com
Start Up Delay From AC Turn On
Figure 1
Start up example from AC turn on
(230 VAC, 79 ms)
Hold Up Time From Loss of AC
Figure 2
Hold up example at 85 W load
with 230 VAC input (19 ms)
3
xppower.com
Ripple & Noise
Figure 3
AHM85PS12
Ripple & noise example at 85 W load
with 230 VAC input (75 mV)
Figure 4
AHM85PS24
Ripple & noise example at 85 W load
with 230 VAC input (77 mV)
Figure 6
Ripple & noise measurement circuit
10 µF
Electrolytic
0.1 µF
Ceramic
4
xppower.com
General Specifications
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Characteristic
Efficiency
Isolation: Input to Output
Input to Ground
Output to Ground
Switching Frequency
Power Density
Mean Time Between Failure
Weight
Minimum
4000
1500
500
45
90
172
0.9 (400)
Typical
92
Maximum
Units
%
VAC
VAC
VAC
kHz
W/in
3
kHrs
lb (g)
Notes & Conditions
Full load (see fig.7-8)
Class I Models
Class I Models
PFC stage
DC-DC stage
MIL-HDBK-217F, Notice 2 +25 °C GB
200
110
3.9
Average Active Efficiency
Characteristic
AHM85PS12 & C2
AHM85PS15 & C2
AHM85PS19 & C2
AHM85PS24 & C2
Average Active Efficiency
115 V / 60 Hz
90.41
89.37
90.36
91.67
230 VAC / 50 Hz
89.92
88.99
89.93
91.23
%
As per Energy Star Level V test procedure
Units
Notes & Conditions
Efficiency Versus Load
100%
90%
80%
70%
Efficiency
60%
50%
40%
30%
20%
10%
0%
10
20
30
40
50
60
70
80
90
100
Load (%)
Figure 7 - AHM85PS12
115Vac input
230Vac input
100%
90%
80%
70%
Efficiency
60%
50%
40%
30%
20%
10%
0%
10
20
30
40
50
60
70
80
90
100
Load (%)
Figure 8 - AHM85PS24
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