Flexible 500W peak-power AC-DC supply is ideal for industrial and medical (BF) device applications
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Flexible 500W peak-power AC-DC supply is ideal for industrial and medical (BF) device applications


The new CMP250 series of high peak-power AC-DC power supply units have been developed to support a wide range of healthcare, industrial and IT applications. With a highly flexible combination of electrical and thermal characteristics, these power supplies deliver up to 500 Watts of peak power for up to 60 seconds, as well as providing up to 250 Watts of continuous convection-cooled power. This flexibility makes the series ideal for motor applications and other electromechanical loads without the need for fan cooling, removing unwanted audible noise, across a range of applications.


For healthcare applications, the CMP250 series provides input/output (I/O) isolation of 4 kVAC with 2 x MOPP (Means of Patient Protection). The power supplies also provide 1 x MOPP isolation from both input to ground and output to ground, all rated at the AC input voltage. Maximum earth leakage current of 250uA coupled with patient leakage current of less than 80uA combined with these isolation characteristics make the CMP250 an ideal choice for Body Floating (BF) applications, targeting a range of equipment such as surgical tools, motorised beds and chairs, use in life support, imaging and blood processing products.


The CMP250 also supports wide a variety of industrial and ITE applications, especially supporting those applications that have requirements for long-duration peak currents to drive equipment such as printers, motors and electromechanical devices.


The supply’s peak-power capability of 500 W significantly reduces cost in medical devices and industrial equipment compared to implementing a power supply that is rated for continuous operation at more than 250 W. Operating over a wide –40°C to +70°C temperature range with no derating until the ambient temperature is above +50°C, the series offers a high typical efficiency of 89% along with a very flat efficiency curve across the entire load range. The efficiency performance means less dissipated heat enabling the convection-cooled design and negating the need for system fan cooling.


Supplied in a low-profile 1U-high chassis and 7.5 x 4-inch footprint and operating from a universal AC range of 80 to 264 VAC, the series is available in three different models, offering outputs of 24, 36 or 48 VDC.


Key features include constant-current overload characteristics to support a wide variety of loads, a 5V standby output rated at 1.5A, present whenever the AC input is applied, and a 12V/0.6A auxiliary output. Signals and controls include remote sense, output inhibit, AC OK/Power Fail signal and the ability to current share up to three units in parallel. This fully featured supply provides an array of options which, coupled with excellent EMC performance and approvals to the very latest safety standards, ensures easy integration for the end equipment designer.

Input Connector CON1
Pin Function
1 Line
2 Neutral
3 Earth
Output Connector
CON2 +V1
CON3 -V1
Signals Connector CONS
1 -VE Standby V2
2 -VE Standby V2
3 +VE Standby V2
4 +VE Standby V2
5 +VE Aux. V3
6 -VE Aux. V3
7 +VE Sense, V1
8 -VE Sense, V1
9 Current Share
10 Inhibit
11 Power Fail
12 N/C

Safety approvals for ITE, industrial and medical applications include IEC/EN/UL60950-1, IEC/U/ENL62368-1, ANSI/AAMI ES60601-1 and IEC/EN60601-1. The series also offers EN55032/11 Class B conducted and Class A radiated emissions. Compliance with Class B radiated is achieved using a simple additional suppression core on the AC input cable to the supply.

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