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reference designBQ25751 | Demoboard PMP31276

Texas Instruments BQ25751 | Demoboard PMP31276

288W PFC, LLC and bidirectional battery charger reference design

Overview

TopologyBuck-Boost Converter
Input voltage44-70 V
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
Simu­lation
Downloads
Status
Product series
Pins
Application
PCB/Cable/Panel
Modularity
Type
Wire Section
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
2θ50% typ.(°)
C
Tol. C
VR(V (DC))
Size
Operating Temperature
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
Mount
IR(A)
Working Voltage(V (AC))
Polarity
Stranded Wire Section (AWG)
Stranded Wire Section (Metric)
SamplesAvailability & Sample
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744325550
SPECWE-HCI SMT Flat Wire High Current Inductor, 2, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN 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-HCI SMT Flat Wire High Current Inductor
Pins2 
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Size1050 
Operating Temperature -40 °C up to +150 °C
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Length10.5 mm
Width10.2 mm
Height4.7 mm
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Inductance5.5 µH
Performance Rated Current12 A
Saturation Current @ 10%4.5 A
Saturation Current @ 30%12 A
DC Resistance10.3 mΩ
Self Resonant Frequency30 MHz
MaterialSuperflux 
Packaging Unit700 
MountSMT 
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691213510003
SPECWR-TBL Series 2135 - 5.08 mm Horizontal Entry Modular w. Rising Cage Clamp, 3, Rising Cage Clamp
Simu­lation–
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 2135 - 5.08 mm Horizontal Entry Modular w. Rising Cage Clamp
Pins3 
ApplicationRising Cage Clamp 
PCB/Cable/PanelPCB 
ModularityYes 
TypeHorizontal Cable Entry 
Wire Section 14 to 30 (AWG) 2.08 to 0.0509 (mm²)
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Operating Temperature -30 °C up to +110 °C
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Length15.24 mm
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PackagingBox 
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MountTHT 
Rated Current14 A
Working Voltage250 V (AC)
Polarity03 
Stranded Wire Section (AWG)14 to 30 (AWG) 
Stranded Wire Section (Metric)2.08 to 0.0509 (mm²) 
–Check availability
691236510003
SPECWR-TBL Series 2365 - 5.08 mm Horiz. Entry w. Rising Cage Clamp, 3, Rising Cage Clamp
Simu­lation–
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 2365 - 5.08 mm Horiz. Entry w. Rising Cage Clamp
Pins3 
ApplicationRising Cage Clamp 
PCB/Cable/PanelPCB 
ModularityYes 
TypeHorizontal Cable Entry 
Wire Section 12 to 30 (AWG) 3.31 to 0.0509 (mm²)
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Operating Temperature -30 °C up to +110 °C
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Length15.24 mm
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PackagingBox 
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MountTHT 
Rated Current20 A
Working Voltage450 V (AC)
Polarity03 
Stranded Wire Section (AWG)12 to 30 (AWG) 
Stranded Wire Section (Metric)3.31 to 0.0509 (mm²) 
–Check availability
61900419521
SPECWR-WTB 2.54 mm Male Header, 4, –
Simu­lation–
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-WTB 2.54 mm Male Header
Pins4 
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PCB/Cable/PanelPCB 
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TypeRight Angled Top Locking 
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length10.16 mm
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PackagingBag 
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MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
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–Check availability
61300621121
SPECWR-PHD Pin Header - Dual, 6, –
Simu­lation–
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header - Dual
Pins6 
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TypeStraight 
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Operating Temperature -40 °C up to +105 °C
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Insulation Resistance1000 MΩ
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Length7.62 mm
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PackagingBag 
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MountTHT 
Rated Current3 A
Working Voltage250 V (AC)
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150120VS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, –, –
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
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Dominant Wavelength [typ.]570 nm
Emitting ColorBright Green 
Peak Wavelength [typ.]572 nm
Luminous Intensity [typ.]40 mcd
Forward Voltage [typ.]2 V
Chip TechnologyAlInGaP 
Viewing Angle Phi 0° [typ.]140 °
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Size1206 
Operating Temperature -40 °C up to +85 °C
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Length3.2 mm
Width1.6 mm
Height0.68 mm
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PackagingTape and Reel 
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Packaging Unit4000 
MountSMT 
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885012206095
SPECWCAP-CSGP MLCCs 50 V(DC), –, –
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)
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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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Packaging Unit4000 
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885012207103
SPECWCAP-CSGP MLCCs 50 V(DC), –, –
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)
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Capacitance1 µF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0805 
Operating Temperature -55 °C up to +125 °C
Dissipation Factor10 %
Insulation Resistance0.1 GΩ
Ceramic TypeX7R Class II 
Length2 mm
Width1.25 mm
Height1.25 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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Packaging Unit3000 
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–Check availability
885012209073
SPECWCAP-CSGP MLCCs 50 V(DC), –, –
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
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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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