H-bridge transformer driver simplifies DC-DC power isolation

Maxim Integrated Products has introduced the MAX13256, an H-bridge transformer driver with a wide input-voltage range for isolated power supplies.

Using this product, engineers can quickly design a highly efficient (up to 90%) isolated DC-DC converter. The MAX13256 drives a transformer's primary coil with up to 300mA of current from an 8V to 36V DC supply which can deliver up to 10W of isolated power. Users can choose their own transformer winding ratio which defines the output voltage, thus allowing the selection of virtually any isolated output voltage. This supply range eliminates external voltage regulation. Integrated protection features prevent system-level failures.

By eliminating 16 discrete components, the MAX13256 simplifies BOM complexity and reduces footprint with high integration in a tiny TDFN package. With all these capabilities, the MAX13256 driver is a simple way to create isolated power supplies in smart grid metering applications, and industrial and medical equipment. 

The MAX13256 is available in a 10-pin TDFN and is specified over the -40ºC to +125ºC automotive temperature range.

Key highlights:

• Simple, Flexible Design
  • 8V to 36V Supply Range
  • Up to 90% Efficiency
  • Provides Up to 10W to the Transformer
  • Undervoltage Lockout
  • 2.5V to 5V Compatible Logic Interface
  • Internal or External Clock Source
  • Adjustable Overcurrent Threshold
• Integrated System Protection
  • Fault Detection and Indication
  • Overcurrent Limiting
  • Overtemperature Protection
• Saves Space on Board
  • Small 10-Pin TDFN Package (3mm x 3mm)