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reference designUCC28740 | Demoboard PMP31140

Texas Instruments UCC28740 | Demoboard PMP31140

Offline supercapacitor backup power supply with passive cell balancing reference design

Overview

TopologyFlyback Converter
Input voltage195-480 V
IC revisionB

Description

This reference design introduces an offline single-stage supercapacitor charger. Isolated constant-voltage constant-current flyback controller UCC28740 charges three supercapacitors in series directly from a wide input (195 VAC to 480 VAC). The supercapacitor output voltage is limited to 6.5 V.

Features

  • Resonant-ring valley-switching operation
  • Super capacitor voltage limit of 6.5 V
  • Wide input voltage range of 195 VAC to 480 VAC
  • Output over-voltage and over-current protection
  • Complete tested design with available design files and test report

Typical applications

  • Polyphase electricity meter

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IR(A)
ISAT,10%(A)
RDC max.(Ω)
fres(MHz)
Version
C
VR(V (DC))
Endurance(h)
IRIPPLE(mA)
ILeak(µA)
DF(%)
Pitch(mm)
Ø D(mm)
L(mm)
Packaging
SamplesAvailability & Sample
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744732331
SPECWE-TI Radial Leaded Wire Wound Inductor, 330 µH, 0.6 A
Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TI Radial Leaded Wire Wound Inductor
Inductance330 µH
Rated Current0.6 A
Saturation Current @ 10%1 A
DC Resistance1.2 Ω
Self Resonant Frequency3.9 MHz
VersionHeat Shrinking Tube 
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Length9.5 mm
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860010678024
SPECWCAP-ATG8 Aluminum Electrolytic Capacitors, –, –
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-ATG8 Aluminum Electrolytic Capacitors
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Capacitance1000 µF
Rated Voltage50 V (DC)
Endurance 2000
Ripple Current1485 mA
Leakage Current500 µA
Dissipation Factor10 %
Pitch5 mm
Diameter13 mm
Length25 mm
PackagingAmmopack 
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750319952
SPECOffline Transformer, –, –
Simu­lation–
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Offline Transformer
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