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reference designUCC28722 | Demoboard PMP30281

Texas Instruments UCC28722 | Demoboard PMP30281

Overview

TopologyFlyback Converter
Input voltage85-440 V
Output 124 V / 0.3 A
Output 25 V / 0.4 A
IC revisionB

Description

This offline flyback reference design uses the UCC28722 controller to generate 2 isolated outputs (5 V at 400 mA, 24 V at 300 mA) from an AC input (85 VAC - 480 VAC). The UCC28722 output drive interfaces to a bipolar transistor power switch, enabling a more efficient design than a typical design. The valley-switching technique reduces switching losses and keeps the efficiency high. The controller provides constant-voltage and constant-current regulation without the use of an optical-coupler.

Features

180-VAC - 264-VAC input to 3 isolated outputsPrimary-side regulation eleminates the need for an optical-couplerValley-switching operation keeps the efficiency highDynamic BJT drive enables lower cost converter design

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768772221
WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage), 220 µH, 0.9 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TI HV Radial Leaded Wire Wound Inductor (High Voltage)
Inductance220 µH
Rated Current0.9 A
Saturation Current1.3 A
DC Resistance0.6 Ω
Self Resonant Frequency3.7 MHz
MountTHT 
750317104
Flyback Transformer, –, –
Simu­lation–
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Flyback Transformer
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