Texas Instruments LM5122 | Demoboard PMP23320

Description

This 500-W interleaved SEPIC converter reference design supplies a non-isolated adjustable 5 V to 110 V output voltage with a maximum output current of 5 A. The main power stage uses two LM5122 controllers to power the primary and secondary phases of the SEPIC. A LM5007 buck converter is used to generate a local 10 V bias.

Features

• Maximum Input Voltage: 65 V
• Minimum Input Voltage: 3 V (4.5 V for Start-Up)
• Output Voltage up to 100 V
• Bypass (VOUT = VIN) Operation
• 1.2-V Reference with ±1% Accuracy
• Free-Run and Synchronizable Switching to 1 MHz
• Peak-Current-Mode Control
• Robust 3-A Integrated Gate Drivers
• Adaptive Dead-Time Control
• Optional Diode-Emulation Mode
• Programmable Cycle-by-Cycle Current Limit
• Hiccup-Mode Overload Protection
• Programmable Line UVLO
• Programmable Soft Start
• Thermal Shutdown Protection
• Low Shutdown Quiescent Current: 9 μA
• Programmable Slope Compensation
• Programmable Skip-Cycle Mode Reduces Standby Power
• Allows External VCC Supply
• Inductor DCR Current Sensing Capability
• Multi-phase Capability
• Thermally Enhanced 20 or 24-Pin HTSSOP
• Create a Custom Design Using the LM5122 With the WEBENCH® Power Designer

Typical applications

• 12-V, 24-V, and 48-V Power Systems, High-Current Boost Power Supply, Audio Power Supply
• Automotive Start-Stop

More information

• Datasheet
• IC product information