TIDT357 November   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Power Requirements
    1.     6
    2.     7
    3. 1.1 Power-On Sequence
    4. 1.2 Power-Off Sequence
    5. 1.3 Required Equipment
    6. 1.4 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Start-Up Sequence
    2. 3.2 Shutdown Sequence
    3. 3.3 Output Voltage Ripple
    4. 3.4 Load Transients

2.1 Efficiency Graphs

Figure 3-18 shows the efficiency of the LM61480-Q1 for an 8-V, 13.5-V, and 16-V input with the output being swept from 0 A to 8 A. The LM74700-Q1 reverse battery protection was powered on during this test and is factored into this measurement. This converter also supplies the power to the VDDSHVx rails of the AM62x-Q1 and acts as the input supply for the rest of the voltage regulators and logic devices.

GUID-20230914-SS0I-0ZPD-QDTK-NS6KBR76SLZK-low.png Figure 2-1 LM61480-Q1 Efficiency, 3.3-V Output

Figure 2-2 shows the TPS628502-Q1 efficiency for a 3.3-V input that is supplied directly from an external benchtop supply. The output was swept from 0 A to 2 A. This converter supplies the power to the VDDSHVy rails of the AM62x-Q1.

GUID-20230914-SS0I-RH38-RRF6-98TDLHDSCS7H-low.png Figure 2-2 TPS628502-Q1 Efficiency, 1.8-V Output

Figure 2-3 shows the TPS628502-Q1 efficiency for a 3.3-V input that is supplied directly from an external benchtop supply. The output was swept from 0 A to 2 A. This converter supplies the power to the AM62x-Q1 VDDS_DDR rails.

GUID-20230914-SS0I-BFT6-R6RF-QH6CZCD6V6HG-low.png Figure 2-3 TPS628502-Q1 Efficiency, 1.1-V Output

Figure 2-4 shows the TPS628501-Q1 efficiency for a 3.3-V input that is supplied directly from an external benchtop supply. The output was swept from 0 A to 1 A. This converter supplies the power to the AM62x-Q1 VDDR_CORE rails.

GUID-20230914-SS0I-JXJT-WWPL-SJ22THDXPVLX-low.png Figure 2-4 TPS628502-Q1 Efficiency, 0.85-V Output

The VDD_CORE can operate at 0.75 V or 0.85 V depending on the configuration of VDDR_CORE. Figure 2-5 and Figure 2-6 show the TPS62871-Q1 efficiency for a 3.3-V input that is supplied from an external benchtop supply with a 0.75-V and 0.85-V output, respectively. Each output was swept from 0 A to 9 A. This converter supplies the power to the AM62x-Q1 VDD_CORE rails.

GUID-20230914-SS0I-JWKT-RVXX-C6F2JTRF3FSW-low.png Figure 2-5 TPS62871-Q1 Efficiency, 0.75-V Output
GUID-20230914-SS0I-S9KF-F0GF-JFKVVB4CTHC0-low.png Figure 2-6 TPS62871-Q1 Efficiency, 0.85-V Output