Texas Instruments LM5155 | Demoboard LM5155EVM-SEPIC

Description

The LM5155EVM-SEPIC Evaluation Module (EVM) is designed to showcase the LM5155 wide input voltage Boost/SEPIC/Boost controller, implementing a SEPIC converter with a coupled inductor. The EVM operates at 2.2 MHz, and it produces a regulated output of 12 V 24 W from an input of 5 V to 42 V. When the input voltage is between 3 V to 5 V, the output power is derated down to 10 W. The factory-installed controller is the LM5155-Q1. However, by replacing the IC, the EVM can also be used to demonstrate the performance of the LM51551-Q1, LM5155 and LM51551. The difference between the LM5155-Q1 and LM51551-Q1, or between the LM5155 and LM51551, is that the latter features the hiccup mode for overload protection.

Features

• Wide input voltage range from 3 V to 42 V, to cover typical automotive battery voltage ranges including cold cranking and load dump transients
• Optimized for input voltage range from 6 V to 18 V
• Tightly regulated output voltage of 12 V with a 1% accurate reference voltage
• Supports 2 A full load when VIN is greater than 5 V
• Supports 0.8 A load current when VIN drops to 3 V
• 2.2 MHz switching frequency
• Peak efficiency > 88%
• Can evaluate LM51551-Q1, LM5155, and LM51551 ICs, by replacing the factory installed IC with the corresponding IC
• Hiccup mode for output over current protection (applicable only with LM51551 and LM51551-Q1)

More information

• Datasheet
• IC product information