Texas Instruments LM5158EVM-BST Converter Evaluation Module

Texas Instruments LM5158EVM-BST Converter Evaluation Module (EVM) showcases the features and performance of the LM5158 device as a wide input voltage boost converter with a dual random spread spectrum. The standard configuration of the Texas Instruments LM5158EVM-BST is designed to provide a regulated output of 12V at 1.2A from an input of 3V to 9V (load derated to 0.6A from < 6V input), switching at 2.1MHz.

Features

A tightly regulated output voltage of 12V with 1% accurate reference voltage
High conversion efficiency of > 92% at full load
Constant cycle-by-cycle peak inductor current limit over an input voltage range
Programmable hiccup mode for output overcurrent protection
User-adjustable soft-start time using C_SS
Output overvoltage protection
2.1MHz switching frequency

Multiple BIAS pin and V_CC pin connections to test various configurations
- BIAS connect to V_CC
- BIAS supplied with external power supply
- BIAS supplied by an output voltage
Power-good (PGOOD) indicator with selectable pullup source
External clock synchronization
Programmable dual random spread spectrum reduces the EMI

Required Equipment

Power Supply
- The input voltage source (VIN) should be a variable supply capable of 0V to 10V and source at least 10A
Multimeters
- Voltmeter 1
  - Input voltage connects from VIN+ to VIN–
- Voltmeter 2
  - Output voltage connects from VOUT+ to GND
- Ammeter 1
  - Input current that must be able to handle 10A (a shunt resistor can be used as needed)
- Ammeter 2
  - Output current that must be able to handle 2A (a shunt resistor can be used as needed)

Electronic Load
- The load should be constant resistance (CR) or constant current (CC) capable
- It should safely handle 2A at 12V
Oscilloscope
- 20MHz bandwidth and AC coupling
- Measure the output voltage ripple directly across an output capacitor with a short ground lead
- It is not recommended to use a long-leaded ground connection due to the possibility of noise being coupled into the signal
- To measure other waveforms, adjust the oscilloscope as needed