ATX Power Supply features built-in 24 V battery charger.

Press Release Summary:

Featuring 90–264 Vac universal input with active PFC, Model TMPC-550U provides DC voltage outputs and max loads of +3.3 V/20 A, +5 V/20 A, triple +12 V/16 A, -12 V/0.5 A, and +5 Vsb/3 A for standby purposes. Maximum total output power is 550 W, with combined output of +3.3 V and +5 V limited to 120 W. Measuring 140 x 150 x 86 mm, medical-grade power supply comes with standard output cableset, which includes 24-pin ATX motherboard, PCI-E, 4-pin Molex, and SATA power connectors.

Original Press Release:

TRUMPower Launches UPS-Ready Medical Grade 550W ATX Power Supply with Built-in 24V Battery Charger

Santa Clara, CA – TRUMPower introduces the Intel’s Haswell™ compatible TMPC-550U, which is a medically approved 550W ATX PC power supply equipped with a built-in 24V battery charger. A single 24V or two 12V lead-acid batteries in series can be connected to the TMPC-550U to be used as an interruptible power source, with the backup power being 400W. The battery charger in conjunction with a built-in DC to DC converter ensures that all connected equipment will receive a stable supply of power with the correct corresponding voltage in case of a blackout or temporary power loss.

The TMPC-550U comes with DC voltage outputs and maximum loads of +3.3V/20A, +5V/20A, triple +12V/16A, -12V/0.5A, and +5Vsb/3A for standby purposes. The maximum total output power is 550W, with the combined output of +3.3V and +5V limited to 120W. The total output power for +12V1, +12V2, +12V3 is 432W maximum. Measuring 140mm (L) x 150mm (W) x 86mm (H), the power supply comes with a standard output cableset, which includes the 24 pin ATX motherboard, PCI-E, 4-pin Molex, and SATA power connectors, etc that is suitable for most PC-related applications. Alternatively, a custom cableset can be ordered as well.

The TMPC-550U is designed to meet the 3rd edition of IEC/EN 60601-1, ANSI/AAMI ES 60601-1:2005, CSA C22.2 No. 60601-1: 2008 and IEC/EN 60601-1-2:2014 (4th edition) EMC standards. The power supply is also designed to conform to EN 55011/EN 55022, FCC and VCCI class B conducted and radiated emissions EMC standards. In addition, the power supply complies with RoHS requirements and MTBF of the unit at full load is higher than 100,000 hours at 25°C ambient, calculated per Telcordia SR-332.

The model comes with a earth leakage current of 300µA maximum @ 264 VAC, 63 Hz. The power supply has a 90-264 VAC universal input with active PFC, which meets EN 61000-3-2 standards. Alternatively, it can operate at 24V DC input. The TMPC-550U also features a USB 2.0 interface for communication between the power supply and the back-up battery via a power management program running on the PC system. It has both a battery port connector and communication port connector. Additional key attributes include overvoltage and overcurrent protection on all outputs, low ripple and noise, and 0ºC to +70ºC operating temperature with no derating required below +50 ºC.

For detailed information on the TMPC-550U, please visit or email

TRUMPower has been delivering excellent quality medical and industrial grade AC/DC switching power supplies and DC/DC converters since 1991. The company’s medical grade power supplies range from 4W to 1200W and its line of ITE grade AC/DC power supplies range from 3W to 1400W in wall mount, desktop, open frame, and ATX PC form factors. TRUMPower can accommodate to OEM’s needs, whether they are low volume or high volume power supplies, by providing prompt responses and cost-effective power solutions. As a result, it has gained a substantial number of satisfied customers over the years and continues to do so.

For more information on the company and its other products, visit or email us at

David Tang

Tumbler Technologies + TRUMPower

3350 Scott Blvd., Building 13

Santa Clara, California 95054, USA

Phone: (408) 988-6616 Ext. 102

Fax: (408) 988-6622

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