IC manufacturers Texas Instruments

IC manufacturers (87)

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

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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(mΩ)
Type Samples
74438335330SPEC
8 files WE-MAPI SMT Power Inductor 33 0.5 1.3 1210 10 SMT 1330
742792662SPEC
8 files WE-CBF SMT EMI Suppression Ferrite Bead 0.6 SMT 1000 1050 120 MHz 830 300 Wide Band
750319696SPEC
Push-Pull Transformer
Order Code Data­sheet Simu­lation
74438335330SPEC
742792662SPEC
750319696SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MountZ @ 100 MHz
(Ω)
Zmax
(Ω)
Test Condition ZmaxIR 2
(mA)
RDC max.
(mΩ)
Type Samples