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reference designUCC256613 | Demoboard PMP31276

Texas Instruments UCC256613 | Demoboard PMP31276

288W PFC, LLC and bidirectional battery charger reference design

Overview

TopologyLLC Resonant Converter
Input voltage640 V
Output 124 V / 12 A
IC revisionJULY 2026

Description

This reference design is an AC/DC battery-backup charger with two outputs: system and battery. A 4-SW bidirectional buck-boost charges the battery and supplies system load. An optional microcontroller disables main power sections, reducing stand-by power while collecting parameters for telemetry.

Features

Cycle-by-cycle overcurrent protectionDiscontinuous conduction mode (DCM) and continuous conduction mode (CCM) operationLow standby powerUltra-wide input range

Typical applications

  • Fire Alarm control panel

More information

Parts approved by Texas Instruments

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Order Code
Data­sheet
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Downloads
Status
Product series
C
Tol. C
VR(V (DC))
Size
Operating Temperature
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
L(nH)
LR(nH)
IR(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Endurance(h)
IRIPPLE(mA)
Z(mΩ)
ILeak(µA)
Ø D(mm)
SamplesAvailability & Sample
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885012206083
SPECWCAP-CSGP MLCCs 50 V(DC), 1 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance1 nF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0603 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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885012206087
SPECWCAP-CSGP MLCCs 50 V(DC), 4.7 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance4.7 nF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0603 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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885012206095
SPECWCAP-CSGP MLCCs 50 V(DC), 100 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance100 nF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0603 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor3 %
Insulation Resistance5 GΩ
Ceramic TypeX7R Class II 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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885012209073
SPECWCAP-CSGP MLCCs 50 V(DC), 10 µF, ±10%
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance10 µF
Capacitance±10% 
Rated Voltage50 V (DC)
Size1210 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor10 %
Insulation Resistance0.01 GΩ
Ceramic TypeX7R Class II 
Length3.2 mm
Width2.5 mm
Height2.5 mm
Pad Dimension0.6 mm
Packaging7" Tape & Reel 
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865060562010
SPECWCAP-ASLL Aluminum Electrolytic Capacitors, 680 µF, ±20%
Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-ASLL Aluminum Electrolytic Capacitors
Capacitance680 µF
Capacitance±20% 
Rated Voltage35 V (DC)
Size12.5 x 14.0 
Operating Temperature -55 °C up to +105 °C
Dissipation Factor14 %
Insulation Resistance0.147059 MΩ
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Length14 mm
Width13 mm
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Packaging15" Tape & Reel 
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Endurance 5000
Ripple Current1150 mA
Impedance66 mΩ
Leakage Current238 µA
Diameter12.5 mm
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7443081030
SPECWE-HCM SMT High Current Flat Wire Inductor, –, –

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
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Size1078 
Operating Temperature -40 °C up to +125 °C
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Length9.4 mm
Width6.2 mm
Height7.8 mm
Pad Dimension1.8 mm
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Inductance300 nH
Rated Inductance140 nH
Rated Current38 A
Saturation Current @ 10%28.9 A
Saturation Current @ 30%34.6 A
DC Resistance0.29 mΩ
Self Resonant Frequency33 MHz
MaterialMnZn 
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