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reference designSN6507 | Demoboard SN6507DGQEVM

Texas Instruments SN6507 | Demoboard SN6507DGQEVM

Low-emission 36-V push-pull transformer driver with duty cycle control for isolated power supplies

Overview

TopologyPush-Pull Converter symmetrical isolated
Input voltage24 V
Switching frequency150-2000 kHz
Output 115 V / 0.5 A
Output 2-15 V / 0.5 A

Description

The SN6507 is a high voltage, high-frequency push-pull transformer driver providing isolated power in a small solution size. The device comes with the push-pull topology’s benefits of simplicity, low EMI, and flux cancellation to prevent transformer saturation. Further space savings are achieved through duty cycle control, which reduces component count for wide-input ranges, and by selecting a high switching frequency, reducing the size of the transformer. The device integrates the controller and two 0.5-A NMOS power switches that switch out of phase. Its input operating range is programmed with precision Undervoltage lockouts. The device is protected from fault conditions by over-current protection (OCP), adjustable under-voltage lockout (UVLO), over-voltage lockout (OVLO), thermal shutdown (TSD), and break-before-make circuitry. The programmable Soft Start (SS) minimizes inrush currents and provides power supply sequencing for critical power-up requirements. Spread Spectrum Clocking (SSC) and pin-configurable scalable Slew Rate Control (SRC) further reduce emissions for ultra-low EMI requirements. The SN6507 is available in a 10-pin HVSSOP DGQ package. The device operation is characterized for a temperature range from –55°C to 125°C.

Features

  • Push-pull driver for transformers
  • Wide input voltage range: 3 V to 36 V
  • 60 V input voltage tolerance
  • Duty-cycle control for line regulation
  • 0.5 A switches with programmable current limit
  • Wide switching frequency range: 150 kHz to 2 MHz
  • Allows small-size transformers
  • Programmable switching frequency
  • External clock synchronization option
  • Ultra-low noise and EMI
  • Symmetric push-pull topology
  • Spread sprectrum clocking
  • Pin-configurable slew-rate control
  • Protection Features
  • Adjustable under voltage lockout (UVLO)
  • Programmable over-current protection (OCP)
  • Over voltage lockout (OVLO)
  • Thermal shutdown (TSD)
  • Wide temperature range: –55°C to 125°C
  • Programmable soft-start to reduce In-rush current
  • 10-Pin HVSSOP (DGQ) package with thermal pad

Typical applications

  • Solar inverters, protection relays, Factory automation, Building automation
  • Medical instruments
  • Motor drives: IGBT and SiC gate-driver supplies, Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, low-power LAN

More information

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Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
VIN
VOut1(V (DC))
IOut1(mA)
Type of Insulation
fswitch(kHz)
∫Udt(Vµs)
NPRI : NSEC
VT(V (AC))
L(mm)
W(mm)
H(mm)
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(mΩ)
Type
SamplesAvailability & Sample
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74438335330
SPECWE-MAPI SMT Power Inductor, 33 µH, 0.7 A
Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance33 µH
Performance Rated Current0.7 A
Saturation Current @ 30%1.7 A
DC Resistance1210 mΩ
Self Resonant Frequency10 MHz
Operating Voltage80 V
MountSMT 
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Length3 mm
Width3 mm
Height1.5 mm
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DC Resistance1330 mΩ
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750319696
SPECWE-PPTI Push-Pull Transformers, 500 µH, –

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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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PPTI Push-Pull Transformers
Inductance500 µH
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MountSMT 
Input Voltage 24 V (DC)
Output Voltage 115 V (DC)
Output Current 1400 mA
Type of InsulationFunctional 
Switching Frequency 400 - 600
Voltage-µSecond36 Vµs
Turns Ratio1.4:1 
Insulation Test Voltage2500 V (AC)
Length8.5 mm
Width13.12 mm
Height5.5 mm
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742792662
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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MountSMT 
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Length1.6 mm
Width0.8 mm
Height0.8 mm
Impedance @ 100 MHz1000 Ω
Maximum Impedance1050 Ω
Maximum Impedance120 MHz 
Rated Current 2830 mA
DC Resistance300 mΩ
TypeWide Band 
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