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reference designTPS23730 | Demoboard PMP22477

Texas Instruments TPS23730 | Demoboard PMP22477

Class 6 PoE PD flyback converter (12 V, 3.8 A) with input-power limiting and PSR reference design

Overview

TopologyFlyback Converter
Input voltage42.5-57 V
Output 112 V / 3.8 A

Description

This reference design implements a Power over Ethernet (PoE) Power Device (PD) flyback converter with 12-V and 3.8-A output. TPS23730 PD and PWM controller provide all necessary functions to implement the PoE PD and PWM control for the flyback converter. TPS23730 uses primary side regulation (PSR), eliminating the need for optocoupler feedback. An input power-limiting circuit enables the output to be paralleled with a second converter for increased output-power capability.

Features

  • Combined PD and PWM controller
  • Primary side regulation (no optocoupler)
  • Input-power limiting
  • Converters can be paralleled for increased power

Typical applications

  • Occupancy detection (people tracking, people counting), WLAN/Wi-Fi access point, Vision sensors, Barcode reader

More information

Parts approved by Texas Instruments

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Product series
C
Tol. C
Size
Q
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(Ω)
Type
Winding Style
Number of windings
L1(µH)
IR(mA)
RDC max.(Ω)
VR(V (DC))
Z(Ω)
Data rate
Ports
PoE
Improved CMRR
Operating Temperature
VT(V (AC))
Mount
L(µH)
LSmin.(nH)
SamplesAvailability & Sample
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885012006057
SPECWCAP-CSGP MLCCs 50 V(DC), 100 pF, ±5%
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance100 pF
Capacitance±5% 
Size0603 
Q-Factor1000 
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Insulation Resistance10 GΩ
Ceramic TypeNP0 Class I 
Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.4 mm
Packaging7" Tape & Reel 
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Rated Voltage50 V (DC)
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Operating Temperature -55 °C up to +125 °C
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885012206083
SPECWCAP-CSGP MLCCs 50 V(DC), 1 nF, ±10%
Simu­lation
Availability
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Downloads8 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% 
Size0603 
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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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Rated Voltage50 V (DC)
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Operating Temperature -55 °C up to +125 °C
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742792641
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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Size0603 
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Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.3 mm
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Impedance @ 100 MHz300 Ω
Maximum Impedance450 Ω
Maximum Impedance250 MHz 
Rated Current 22000 mA
DC Resistance0.15 Ω
TypeHigh Current 
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Number of windings1 
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Rated Current2000 mA
DC Resistance [1]0.15 Ω
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Operating Temperature -55 °C up to +125 °C
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MountSMT 
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744272251
SPECWE-SL5 SMT Common Mode Line Filter, –, –
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-SL5 SMT Common Mode Line Filter
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Length10 mm
Width8.7 mm
Height6.5 mm
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Impedance @ 100 MHz800 Ω
Maximum Impedance1200 Ω
Maximum Impedance20 MHz 
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DC Resistance0.035 Ω
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Winding Stylesectional 
Number of windings2 
Inductance [1]250 µH
Rated Current2000 mA
DC Resistance [1]0.035 Ω
Rated Voltage80 V (DC)
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Operating Temperature -40 °C up to +125 °C
Insulation Test Voltage1000 V (AC)
MountSMT 
Inductance250 µH
Leakage Inductance [min.]1500 nH
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744273501
SPECWE-SL5 HC SMT Common Mode Line Filter, –, –
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-SL5 HC SMT Common Mode Line Filter
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Length9.5 mm
Width8.3 mm
Height5 mm
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DC Resistance0.0055 Ω
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Winding Stylesectional 
Number of windings2 
Inductance [1]5 µH
Rated Current5000 mA
DC Resistance [1]0.0055 Ω
Rated Voltage80 V (DC)
Impedance500 Ω
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Operating Temperature -40 °C up to +125 °C
Insulation Test Voltage500 V (AC)
MountSMT 
Inductance5 µH
Leakage Inductance [min.]570 nH
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7490220122
SPECWE-LAN LAN Transformer, –, –
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-LAN LAN Transformer
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Length17.55 mm
Width16 mm
Height98.8 mm
Pad Dimension13.97 mm
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Type4PPoE (to 900 mA) 
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Inductance [1]350 µH
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Data rate10/100/1000BASE-T 
Ports1 
PoE4PPoE (up to 1000 mA) 
Improved Common Mode RejectionNo 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage1500 V (AC)
MountSMT 
Inductance350 µH
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–Check availability