Power Supply Controller 12-Pin ESIP-B

The TFS760HG is incorporate both a high-power two-switch-forward converter and a mid-power fly back (standby) converter into a single, low-profile eSIP™ power package. The single chip solution provides the controllers for the two-switch-forward and fly back converters, high- and low-side drivers, all three of the high-voltage power MOSFETs, and eliminates the converter’s need for costly external pulse transformers. The device is ideal for high power applications that require both a main power converter (two-switch forward) up to 305 W, and standby converter (fly back) up to 20 W. TFS760HG includes standard set of comprehensive protection features, such as integrated soft-start, fault and over-load protection, and hysteretic thermal shutdown. TFS760HG utilizes advanced power packaging technology that simplifies the complexity of two-switch forward layout, mounting and thermal management, while providing very high power capabilities in a single compact package. The devices operate over a wide input voltage range, and can be used following a power-factor correction stage such as HiperPFS.Two-switch-forward power converters are often selected for applications demanding cost-effective efficiency, fast transient response, and accurate tolerance to line voltage fluctuation. The two-switch-forward controller incorporated into TFS760HG devices improves on the classic topology by allowing operation considerably above 60% duty cycle. This improvement reduces RMS currents conduction losses, minimizes the size and cost of the bulk capacitor, and minimizes output diode voltage ratings. The advanced design also includes transformer flux reset control (saturation protection) and charge-recovery switching of the high-side MOSFET, which reduces switching losses. This combination of innovations yields an extremely efficient power supply with smaller MOSFETs, fewer passives and discrete components, and a lower-cost transformer.

• Single chip solution for two-switch forward main and fly back standby
• High integration allows smaller form factor and higher power density designs
  • Incorporates control, gate drivers, and three power MOSFETS
  • Level shift technology eliminates need for pulse transformer
  • Protection features include: UV, OV, OTP, OCP, and SCP
• Transformer reset control
  • Prevents transformer saturation under all conditions
• Allows >50% duty cycle operation
  • Reduces primary side RMS currents and conduction losses
• Standby supply provides built-in overload power compensation
• Output Peak Power (50 °C) : 358 W (Two-Switched Forward 380 V)
• High efficiency solution easily enables design to meet stringent efficiency specifications
• >90% efficiency at full load
• No-load regulation and low losses at light-load
• Simple clip mounting to heat sink without need for insulation pad
• Halogen free and RoHS compliant