CMH250 Series

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2

AC-DC Power Supplies

Input

Output

Characteristic

Minimum

Typical

Maximum

Units

Notes & Conditions

Output Voltage

12

48

VDC

See Models and Ratings table

Initial Set Accuracy

±1

%

50% load, 115/230 VAC

Output Voltage Adjustment

±10

%

Minimum Load

0A

Start Up Delay

1.0

2.0

s

115/230 VAC full load from input AC turn on

Hold Up Time

20

30

ms

90 VAC

Drift

±0.2

%

After 20 min warm up

Line Regulation

0.5

%

Load Regulation

0.5

%

Transient Response

<4

%

Recovery within 1% in less than 500 µs

for a 50-75%-50% load change

Ripple & Noise

1

% pk-pk

20 MHz bandwidth

Overvoltage Protection

115

140

%

Vnom DC. Output 1, recycle input to reset

Overload Protection

110

150

%

Approx. constant current, see fig. 2 characteristic V1

Short Circuit Protection

Shutdown and auto recovery

Temperature Coefficient

0.05

%/˚C

Overtemperature Protection

Shut down & auto recovery

Characteristic

Minimum

Typical

Maximum

Units

Notes & Conditions

Input Voltage - Operating

80

115/230

264

VAC

Derate output power < 90 VAC. See fig. 1

Input Voltage - Fault Condition

300

VAC

5 seconds max

Input Frequency

47

50/60

63

Hz

Agency approval, 47-63 Hz

Power Factor

>0.95

EN61000-3-2 class A compliant

EN61000-3-2 class C for loads ≥50%

Input Current - Full Load

2.6/1.3

A

115/230 VAC

No Load Input Power

1.3

W

All models, when optional inhibit activated

3.7

W

CMH250PS12 - 115V AC

4.2

W

CMH250PS12 - 230V AC

4.0

W

CMH250PS24 - 115V AC

4.8

W

CMH250PS24 - 230V AC

3.5

W

CMH250PS48 - 115V AC

3.0

W

CMH250PS48 - 230V AC

Inrush Current

30

40

A

230 VAC

Earth Leakage Current

100/200

250

µA

Typ. 115/230 VAC 50 Hz, Max 264 VAC 60 Hz

Input Protection

F10 A/250 V internal fuse in both AC lines

Input Voltage Derating

Figure 1

Overload Characteristics

Figure 2

225

200

150

175

250

80

85

Input Voltage (VAC)

275

90

264

300

Current (A)

Typical overload characteristic curve for CMH250PS12

Current limit adjustable via PMBus control

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

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