SLVUAK9A December   2015  – May 2021 TPS65265

 

  1.   Trademarks
  2. 1Background
  3. 2Schematic
  4. 3Board Layout
  5. 4Bench Test Setup Conditions
    1. 4.1 Header Description and Jumper Placement
  6. 5Power-Up Procedure
  7. 6Bill of Materials
  8. 7Revision History

5 Power-Up Procedure

Power-up with dedicated enable pin:

  1. Apply 4.5 V–17 V to J5
  2. Toggle J6 , J7, or J8 to enable VOUT1, VOUT2, and VOUT3, respectively
  3. Apply loads to the output connectors

Six bucks power sequence schemes with the pre-defined power up and power down sequence, shown in Table 5-1.

  1. Connect J9 to GND or high
  2. Connect J6 to High(or Low), J7 to High(or Low)
  3. Apply 4.5 V–18 V to J5
  4. Toggle J8 to enable VOUT1, VOUT2, and VOUT3 (power up sequence shown in Table 5-1)
  5. Apply loads to the output connectors
Table 5-1 Power Sequencing
ModeEN1EN2EN3Start SequencingShutdown Sequencing
LowHighHighUsed to start/stop bucks in sequencebuck1→buck2→buck3Buck3→buck2→buck1
LowLowHighBuck2→buck1→buck3Buck3→buck1→buck2
LowHighLowBuck2→buck3→buck1Buck1→buck3→buck2
HighHighHighBuck1→buck3→buck2Buck2→buck3→buck1
HighLowHighBuck3→buck1→buck2Buck2→buck1→buck3
HighHighLowBuck3→buck2→buck1Buck1→buck2→buck3
High/LowLowLowReservedReservedReserved