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Texas Instruments SN6507/SN6507-Q1 Push-Pull Transformer Driver

Texas Instruments SN6507/SN6507-Q1 Low-Emissions 36V Push-Pull Transformer Driver is a high voltage, high-frequency push-pull transformer driver delivering isolated power in a small solution size. The SN6507/SN6507-Q1 implements the benefits of push-pull topology, including simplicity, low EMI, and flux cancellation to prevent transformer saturation. The device achieves further space saving 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 TI SN6507/SN6507-Q1 Push-Pull Transformer Driver integrates a controller and two 0.5A NMOS power switches that switch out of phase. The driver features a programmable input operating range with precision undervoltage lockouts. Protection features on the device include 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) also minimizes inrush currents and promotes power supply sequencing for critical power-up requirements. Spread Spectrum Clocking (SSC) and pin-configurable Slew Rate Control (SRC) further reduce radiated and conducted
emissions for ultra-low EMI requirements.

The SN6507/SN6507-Q1 is housed in a 10-pin HVSSOP DGQ package and is characterized by a temperature range from –55°C to 125°C. The SN6507-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Push-pull driver for isolation transformers
  • 3V to 36V wide input voltage range
    • Input voltage tolerance up to 60V
    • Duty-cycle control for line regulation
  • 0.5A switches with programmable current limit
  • 100kHz to 2MHz wide switching frequency range
    • Compatible with small-footprint transformers
    • Programmable switching frequency
    • External clock synchronization option
  • Low noise and emissions
    • Symmetric push-pull topology
    • Spread spectrum clocking
    • Pin-configurable slew-rate control
  • Protection Features
    • Adjustable under voltage lockout (UVLO)
    • Programmable over-current protection (OCP)
    • Overvoltage lockout (OVLO)
    • Thermal shutdown (TSD)
  • –55°C to 125°C wide temperature range
  • Programmable soft-start to reduce in-rush current
  • 10-pin HVSSOP (DGQ) package with thermal pad

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

Datasheets

Block Diagram

Block Diagram - Texas Instruments SN6507/SN6507-Q1 Push-Pull Transformer Driver

Simplified Schematic

Schematic - Texas Instruments SN6507/SN6507-Q1 Push-Pull Transformer Driver

Associated Evaluation Module

Texas Instruments SN6507DGQEVM Driver Evaluation Module (EVM)

Evaluates the performance of the SN6507 transformer driver in an isolated power supply application.

Learn Moreo Texas Instruments SN6507DGQEVM Driver Evaluation Module (EVM) View Productspowiązany z Texas Instruments SN6507DGQEVM Driver Evaluation Module (EVM)
Opublikowano: 2022-07-28 | Zaktualizowano: 2022-12-07