SNVU783A October   2021  – February 2024 LM5158

 

  1.   1
  2.   LM5158EVM-BST Evaluation Module
  3.   Trademarks
  4. 1Features and Electrical Performance
    1. 1.1 Electrical Parameters
    2. 1.2 Configuration Points
  5. 2Application Schematic
  6. 3EVM Picture
  7. 4Test Setup and Procedure
    1. 4.1 Test Setup
    2. 4.2 Test Equipment
  8. 5Test Results
    1. 5.1 Efficiency Curve
    2. 5.2 Load Regulation Curve
    3. 5.3 Thermal Performance
    4. 5.4 Steady State Waveforms
    5. 5.5 Start-Up Waveforms
    6. 5.6 Load Transient Waveforms
    7. 5.7 AC Loop Response Curves
  9. 6Design Files
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  10. 7Revision History

1.2 Configuration Points

Table 1-2 indicates the available test points and configuration jumpers. These points offer flexibility in configuring the evaluation module and include, but are not limited to:

  • The BIAS pin is connected to the following:
    • External supply (VAUX)
    • Input voltage (VIN)
    • Regulated output voltage (VOUT)
    • VCC pin
  • The PGOOD pin is supplied by either VCC or VAUX.
  • External clock synchronization
  • Shutdown signal by pulling the SD pin low
  • Four different modes operation to enable and disable the spread spectrum and hiccup mode

Table 1-2 Jumper Description
JUMPER PIN DESCRIPTION
TP1 VIN+ Positive input voltage sense connection
TP2 SW Probe point for the switch node of the LM5158 boost circuit
TP3 VOUT+ Positive output voltage sense connection
TP4 VIN– Negative input voltage sense connection
TP5 GND Negative output voltage sense connection
TP6 SYNC Input for the external clock signal. To implement the external clock synchronization, remove the jumper resistor R10 and tie the external signal to TP6 (SYNC).
TP7 VAUX Supply the BIAS pin from an external supply.
TP8 VOUT+ Loop response positive injection point
TP9 VOUT– Loop response negative injection point
TP10 AGND Negative point for external signals
TP11 SD High signal pulls the UVLO pin to ground entering shutdown mode
J6 Pin 1 to pin 2 Connect VOUT to the BIAS pin of the LM5158 through D3.
Pin 2 to pin 3 Directly connect VOUT to the BIAS pin of the LM5158.
J7 Pin 1 to pin 2 Connect VIN to the BIAS pin of the LM5158 through D4.
Pin 2 to pin 3 Directly connect VIN to BIAS pin of the LM5158.
J8 Pin 1 to pin 2 Directly connect VCC to the BIAS pin.
J9 Pin 1 to pin 2 Directly connect VAUX to the BIAS pin.
J10 Pin 1 to pin 2 (NN) Hiccup mode disabled, spread spectrum disabled
Pin 3 to pin 4 (HS) Hiccup mode enabled, spread spectrum enabled
Pin 5 to pin 6 (HN) Hiccup mode enabled, spread spectrum disabled
Pin 7 to pin 8 (NS) Hiccup mode disabled, spread spectrum enabled
J11 SS (Pin 1) Monitor the SS pin.
COMP (Pin 2) Monitor the COMP pin.
AGND (Pin 3) Connection to AGND plane
SYNC (Pin 4) Monitor the EN/UVLO/SYNC pin.
PGOOD (Pin 5) Monitor the PGOOD pin.
BIAS-IC (Pin 6) Monitor the BIAS pin.
VCC (Pin 7) Monitor the VCC pin.

J12

Pin 1

 Positive input voltage sense connection
Pin 2 Negative input voltage sense connection

J13

 Pin 1 Positive output voltage sense connection
Pin 2 Negative output voltage sense connection