SNVU797C April   2022  – October 2024 LM5177

 

  1.   1
  2.   LM5177 Wide-VIN Buck-Boost Controller EVM
  3.   Trademarks
  4. 1Features
  5. 2Connector, Test Point, and Selection Switch Descriptions
    1. 2.1 Connector Descriptions
    2. 2.2 Jumper Descriptions
    3. 2.3 Test Point Descriptions
    4. 2.4 Selection Switch Descriptions
      1. 2.4.1 S1 and S2 CFG setting
  6. 3Test Setup and Procedure
    1. 3.1 Test Setup
    2. 3.2 Test Procedure
    3. 3.3 Precautions
  7. 4Test Data and Performance Curves
    1. 4.1 Thermal Performance
    2. 4.2 Efficiency
    3. 4.3 Steady State Waveforms
    4. 4.4 Step Load Response
  8. 5Schematic
  9. 6Optional Components
  10. 7Board Layout
  11. 8Bill of Materials
  12. 9Revision History

2.2 Jumper Descriptions

Table 2-2 Jumpers
Reference Designator Pins Description Default Connection
JP1 Pin 1 to Pin 2

(GND)

 Jumper in position GND and power save mode (PSM) is enabled.
Pin 2 to Pin 3

(VCC)

 Jumper in position VCC and power save mode (PSM) is disabled.

*
JP2 Pin 2 to Pin 3

(VCC)

 Jumper in position VCC (SYNC pin tied VCC) and frequency synchronization is disabled.

*

Open

 Jumper removed and external clock feed in on the SYNC pin. SYNC is enabled.
JP3 Pin 1 to Pin 2

(GND)

 Jumper in position GND (DTRK pin tied GND) and digital voltage tracking is disabled.

*
Open Jumper removed and voltage feed in on the DTRK pin. DTRK is enabled in case the voltage on the DTRK pin is higher than the rising threshold of the VT(DTRK).
JP4 Pin 1 to Pin 2

(VEXT)

 Jumper in position VEXT and the input from J7-VEXT is connected to the BIAS pin.
Pin 3 to Pin 4

(VIN)

 Jumper in position VIN. VIN (J1) is connected to the BIAS pin.

*
Pin 5to Pin 6

(VOUT)

 Jumper in position VOUT. VOUT (J2) is connected to the BIAS pin.
JP5 Pin 1 to Pin 2

(GND)

Jumper in position GND (EN/UVLO pin tied GND). The LM5177 is disabled.
Open Jumper removed (the EN pin is tied to a resistor divider network consisting of R14 and R15). The EN/UVLO threshold is set with the resistor divider network.

*
Pin 2to Pin 3

(VIN)

 Jumper in position VCC (EN/UVLO pin tied VCC). The LM5177 is enabled.