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reference designSN6505B

Texas Instruments SN6505B

Signal and power isolation with 3.3 V / 5 V input and 12 V / 15 V output

Overview

TopologyPush-Pull Converter symmetrical isolated
Input voltage2.25-5.5 V
Switching frequency100-1600 kHz
Output 116 V / 1.5 A

Description

This application note gives out information on how to make a compact-design for a combination of signal and power isolation. There are several important points to achieve a proper design for isolation power supply that will be discussed in this app note. The board contains three independent lanes that show transformer and component selection for different requirements.

Features

  • Push-pull driver for transformers
  • Wide input voltage range: 2.25 V to 5.5 V
  • High output drive: 1 A at 5 V supply
  • Low RON 0.25 Ω max at 4.5 V supply
  • Ultra-low EMI
  • Spread spectrum clocking
  • Precision internal oscillator options: 160 kHz (SN6505A) and 420 kHz (SN6505B)
  • Synchronization of multiple devices with external clock input
  • Slew-rate control
  • 1.7 A Current-limit
  • Low shutdown current: <1 µA
  • Thermal shutdown
  • Wide temperature range: –55°C to 125°C
  • Small 6-Pin SOT23 (DBV) package
  • Soft-start to reduce In-rush current

More information

Products

Order Code
Data­sheet
Downloads
Status
Product series
VIN
VOut1(V)
IOut1(mA)
Type of Insulation
fswitch(kHz)
∫Udt(Vµs)
NPRI : NSEC
L(µH)
VT(V (AC))
L(mm)
W(mm)
H(mm)
Mount
VOut2(V)
IOut2(mA)
VOut3(V)
IOut3(mA)
VOut4(V)
IOut4(mA)
Samples
750316016
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Downloads8 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 112.85 V
Output Current 1100 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1:2.57:1.14 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height3.68 mm
MountSMT 
Output Voltage 25.7 V
Output Current 2200 mA
Output Voltage 3-5.7 V
Output Current 3200 mA
Output Voltage 4-12.85 V
Output Current 495 mA
750316017
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 112.85 V
Output Current 1100 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1.17:3:1 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height3.68 mm
MountSMT 
Output Voltage 24.27 V
Output Current 2200 mA
Output Voltage 3-4.27 V
Output Current 3200 mA
Output Voltage 4-12.85 V
Output Current 495 mA
750316018
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 115.7 V
Output Current 185 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1:3.14:1.14 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height3.68 mm
MountSMT 
Output Voltage 25.7 V
Output Current 2200 mA
Output Voltage 3-5.7 V
Output Current 3200 mA
Output Voltage 4-15.7 V
Output Current 485 mA
750316668
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 112.85 V
Output Current 1100 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1:2.57:1.14 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height1.98 mm
MountSMT 
Output Voltage 25.7 V
Output Current 2200 mA
Output Voltage 3-5.7 V
Output Current 3200 mA
Output Voltage 4-12.85 V
Output Current 495 mA
750316669
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 112.85 V
Output Current 1100 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1.17:3:1 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height1.98 mm
MountSMT 
Output Voltage 24.27 V
Output Current 2200 mA
Output Voltage 3-4.27 V
Output Current 3200 mA
Output Voltage 4-12.85 V
Output Current 495 mA
750316670
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 115.7 V
Output Current 185 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1:3.14:1.14 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height1.98 mm
MountSMT 
Output Voltage 25.7 V
Output Current 2200 mA
Output Voltage 3-5.7 V
Output Current 3200 mA
Output Voltage 4-15.7 V
Output Current 485 mA
750316671
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 115.7 V
Output Current 1100 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1.17:3.67:1 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height1.98 mm
MountSMT 
Output Voltage 24.27 V
Output Current 2200 mA
Output Voltage 3-4.27 V
Output Current 3200 mA
Output Voltage 4-15.7 V
Output Current 495 mA
750316019
WE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTM Push-Pull Tiny Multi-Output Transformers
Input Voltage 5 V (DC)
Output Voltage 115.7 V
Output Current 1100 mA
Type of InsulationFunctional 
Switching Frequency 400
Voltage-µSecond8.9 Vµs
Turns Ratio1.17:3.67:1 
Inductance60 µH
Insulation Test Voltage2500 V (AC)
Length11.63 mm
Width12.6 mm
Height3.68 mm
MountSMT 
Output Voltage 24.27 V
Output Current 2200 mA
Output Voltage 3-4.27 V
Output Current 3200 mA
Output Voltage 4-15.7 V
Output Current 495 mA
750316819
WE-PPTI Push-Pull Transformers, 5 V (DC), 12 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTI Push-Pull Transformers
Input Voltage 5 V (DC)
Output Voltage 112 V
Output Current 1460 mA
Type of InsulationFunctional 
Switching Frequency 400 - 700
Voltage-µSecond9 Vµs
Turns Ratio1:2.88 
Inductance86 µH
Insulation Test Voltage2500 V (AC)
Length8.3 mm
Width12.6 mm
Height4.1 mm
MountSMT 
–
–
–
–
–
–
750316818
WE-PPTI Push-Pull Transformers, 5 V (DC), 17 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTI Push-Pull Transformers
Input Voltage 5 V (DC)
Output Voltage 117 V
Output Current 1380 mA
Type of InsulationFunctional 
Switching Frequency 400 - 700
Voltage-µSecond9 Vµs
Turns Ratio1:3.5 
Inductance86 µH
Insulation Test Voltage2500 V (AC)
Length8.3 mm
Width12.6 mm
Height4.1 mm
MountSMT 
–
–
–
–
–
–
750316769
WE-PPTI Push-Pull Transformers, 5 V (DC), 15 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTI Push-Pull Transformers
Input Voltage 5 V (DC)
Output Voltage 115 V
Output Current 1250 mA
Type of InsulationFunctional 
Switching Frequency 300 - 620
Voltage-µSecond9 Vµs
Turns Ratio1:3.45 
Inductance350 µH
Insulation Test Voltage2500 V (AC)
Length6.73 mm
Width10.2 mm
Height4.19 mm
MountSMT 
–
–
–
–
–
–
750316770
WE-PPTI Push-Pull Transformers, 5 V (DC), 12 V
Downloads8 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 8 files as zip archive
ZIP

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTI Push-Pull Transformers
Input Voltage 5 V (DC)
Output Voltage 112 V
Output Current 1280 mA
Type of InsulationFunctional 
Switching Frequency 300 - 620
Voltage-µSecond9 Vµs
Turns Ratio1:2.91 
Inductance350 µH
Insulation Test Voltage2500 V (AC)
Length6.73 mm
Width10.2 mm
Height4.19 mm
MountSMT 
–
–
–
–
–
–