RDK-249 Power Integrations, RDK-249 Datasheet - Page 4

• Manufacturer Part Number: RDK-249
• Description: KIT REF DESIGN PFS762HG
• Manufacturer: Power Integrations
• Series: HiperTFS®r

Specifications of RDK-249

• Main Purpose: Reference Design, PC Power Supply
• Embedded: No
• Utilized Ic / Part: TFS762HG
• Primary Attributes: 12V 25A, 5V 2.9A Outputs, 300 ~ 385 VDC Input
• Output Voltage: 5 V
• Input / Supply Voltage (max): 385 VDC
• Input / Supply Voltage (min): 300 VDC
• Duty Cycle (max): 50 %
• Mounting Style: Through Hole
• Output Current: 2.9 A
• Output Power: 14.5 W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Other names: 596-1398

1 Introduction
This document is an engineering report describing a 5 V, 2.9 A Standby and a 12 V, 25 A
Main power supply utilizing the TFS762HG device from the HiperTFS family. This
example power supply uses a fixed DC input voltage, but in a typical application, it would
be connected to a PFC boost input stage, delivering approximately 385 VDC to
implement a 300 W power supply with various output voltages. A lab bench DC power
supply capable of 400 VDC at 3 A or an AC input rectifier stage is required supply to the
input for evaluation. It is also possible to use the power factor circuit RDK-236 to provide
the regulated 385 VDC needed to power RDK-249.
Typically PC power supplies have a universal AC input power factor corrected (PFC)
input stage but as the bias standby supply must operate before the PFC stage is active,
the Standby output must operate with the DC equivalent of universal AC input voltages
(85 VAC to 265 VAC and 100 VDC to 400 VDC).
The document contains the power supply specification, schematic, bill of materials,
transformer documentation, printed circuit layout, and performance data.
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
Figure 1 – Populated Circuit Board Photograph.
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