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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

Parts approved by Texas Instruments

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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)
SamplesAvailability & Sample
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750316016
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316017
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316018
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316668
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316669
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 12.85 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316670
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316671
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316019
SPECWE-PPTM Push-Pull Tiny Multi-Output Transformers, 5 V (DC), 15.7 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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
–Check availability
750316819
SPECWE-PPTI Push-Pull Transformers, 5 V (DC), 12 V

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.

Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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 
–
–
–
–
–
–
–Check availability
750316818
SPECWE-PPTI Push-Pull Transformers, 5 V (DC), 17 V

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.

Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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 
–
–
–
–
–
–
–Check availability
750316769
SPECWE-PPTI Push-Pull Transformers, 5 V (DC), 15 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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 
–
–
–
–
–
–
–Check availability
750316770
SPECWE-PPTI Push-Pull Transformers, 5 V (DC), 12 V
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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 
–
–
–
–
–
–
–Check availability