SLVU097B October   2003  – October 2021 TPS54350

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Setpoint
      2. 1.3.2 Switching Frequency
      3. 1.3.3 Input Filter
      4. 1.3.4 UVLO Programming
      5. 1.3.5 Synchronization
      6. 1.3.6 Power Good
      7. 1.3.7 Synchronous Low-Side FET
      8. 1.3.8 Optional Output Filtering
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Efficiency
    3. 2.3  Power Dissipation
    4. 2.4  Output Voltage Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristic
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Gate Drive
    10. 2.10 Powering Up and Down
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Bill of Materials
  6. 5Revision History

4.1 Bill of Materials

The bill of materials for the TPS54350EVM—235 is provided in Table 4-1.

Table 4-1 Bill of Materials
Count RefDes Description Size MFR PartNumber
— C1 Capacitor,aluminum, 100 mF, 35 V, 20%, FC Series 0.335x 0.374 Panasonic EEVFC1V101P
1 C11 Capacitor,ceramic, 3300 pF, 50 V, X7R, 10% 603 std std
— C12 Capacitor, aluminum, xxx mF, × V, 20% (UE Series) 7343 std std
— C5 Capacitor,ceramic, xxx mF,vv V, [temp], [tol] 805 std std
1 C2

Capacitor, POSCAP, 100 mF, 6.3 V, 45 mW, 20%

 7343(D) Sanyo 6TPC100M
2 C3,C10 Capacitor,ceramic, 0.1 mF,16 V, X7R, 10% 603 std std
1 C4 Capacitor,ceramic, 1.0 mF,16 V, X7R, 10% 1206 std std
1 C6 Capacitor,ceramic, 82 nF, 16 V, X7R, 10% 603 std std
1 C7 Capacitor,ceramic, 1800 pF, 50 V, X7R, 10% 603 std std
1 C8 Capacitor,ceramic, 33 nF, 50 V, X7R, 10% 603 std std
1 C9 Capacitor,ceramic, 10 mF,25 V, X5R, 20% 1210 Taiyo Yuden TMK325BJ106MN
— D1 Diode,schottky, 3 A, 40 V SMC Motorola MBRS340T3
2 J1,J2 Terminal block, 2 pin, 6 A, 3.5 mm 75525 OST ED1514
1 L1 Inductor,SMT, 10 mH, 8 A, 20 mW 0.51 × 0.51 Vishay IHLP—5050CZ
1 Q1 Transistor,MOSFET, Nch, 11.5 A, 30 V, 9.5 mW 0.160 × 0.130 Fairchild FDR6674A
1 R1 Resistor,chip, 1.00 kW,1/16 W, 1% 603 std std
1 R10 Resistor,chip, 4.7 W,1/2 W, 5% 2010 std std
1 R2 Resistor,chip, 374 W,1/16 W, 1% 603 std std
1 R3 Resistor,chip, 768 W,1/16 W, 1% 603 std std
— R4, R6,R7, R11 Resistor,chip, xx W,1/16 W, 1% 603 std std
1 R5 Resistor,chip, 137 W,1/16 W, 1% 603 std std
1 R8 Resistor,chip, 10.0 kW,1/16 W, 1% 603 std std
1 R9 Resistor,chip, 0 W,1/16 W, 1% 603 std std
4 TP1, TP3, TP4,TP8 Testpoint, red, 1 mm 0.038 Farnell 240–345
4 TP2, TP5, TP6,TP7 Testpoint, black, 1 mm 0.038 Farnell 240–333
1 TP9 Adaptor,3.5 mm probe clip (or 131–5031–00) 0.2 Tektronix 131–4244–00
1 U1 IC,dc/dc converter PWP16 TI TPS54350PWP
1 —— PCB,3 inch × 3 inch × 0.062 inch Any SLVP235