SNVU768 December   2021 LM63460-Q1 , LM64460-Q1

 

  1.   Trademarks
  2. 1High-Density EVM Description
    1. 1.1 Typical Applications
    2. 1.2 Features and Electrical Performance
  3. 2EVM Performance Specifications
  4. 3EVM Photo
  5. 4Test Setup and Procedure
    1. 4.1 EVM Connections
    2. 4.2 EVM Setup
    3. 4.3 Test Equipment
    4. 4.4 Recommended Test Setup
      1. 4.4.1 Input Connections
      2. 4.4.2 Output Connections
    5. 4.5 Test Procedure
      1. 4.5.1 Line/Load Regulation and Efficiency
  6. 5Test Data and Performance Curves
    1. 5.1 Conversion Efficiency
    2. 5.2 Output Voltage Regulation
    3. 5.3 Operating Waveforms
      1. 5.3.1 Start-Up and Enable ON/OFF
      2. 5.3.2 Line and Load Transients
      3. 5.3.3 Short Circuit and Recovery
    4. 5.4 Thermal Performance
    5. 5.5 EMI Results – CISPR 25 Class 5
      1. 5.5.1 Conducted EMI
      2. 5.5.2 Radiated EMI
  7. 6EVM Documentation
    1. 6.1 Schematics
      1. 6.1.1 LM63460EVM-2MHZ Schematic
      2. 6.1.2 LM64460EVM-2MHZ Schematic
    2. 6.2 Bill of Materials
      1. 6.2.1 Alternative BOM Configurations
    3. 6.3 PCB Layout
    4. 6.4 Assembly Drawings
  8. 7Device and Documentation Support
    1. 7.1 Device Support
      1. 7.1.1 Development Support
        1. 7.1.1.1 Custom Design With WEBENCH® Tools
    2. 7.2 Documentation Support
      1. 7.2.1 Related Documentation

6.2 Bill of Materials

Table 6-1 shows the bill of materials for the LM63460EVM-2MHZ and LM64460EVM-2MHZ EVMs. Note that the main BOM difference between the two EVM variants is the IC (U1). The LM63460-Q1 has an RT pin for resistor-adjustable switching frequency and allows external clock synchronization by AC coupling to its EN/SYNC pin. Conversely, the LM64460-Q1 has a default switching frequency of 2.1 MHz and has a MODE/SYNC pin for synchronization and operating mode configuration. Placement of either C20 or R9 accommodates this difference in functionality on a shared PCB design.

Table 6-1 LM63460EVM-2MHZ (BSR173-001) and LM64460EVM-2MHZ (BSR173-002) Bill of Materials
REF DES QTY VALUE DESCRIPTION PACKAGE PART NUMBER MANUFACTURER
C1, C9 2 1 µF CAP, CERM, 1 µF, 16 V, 10%, X7R, 0603 0603 C0603C105K4RACAUTO Kemet
C2, C3, C4, C5 4 2.2 µF CAP, CERM, 2.2 µF, 50 V, 10%, X7R 0805 0805 CGA4J3X7R1H225K125AB TDK
C6, C7 2 0.47 µF CAP, CERM, 0.47 µF, 50 V, 10%, X7R, 0603 0603 CGA3E3X7R1H474K080AE TDK
C8 1 68 µF 68 µF, 50 V, aluminum electrolytic cap 1210 EEE-FN1H680XL Panasonic
C9, C10, C11 3 47 µF CAP, CERM, 47 µF, 10 V, 20%, X7S, 1210 1210 CGA6P1X7S1A476M250AC TDK
C13, C14 2 22 nF CAP, CERM, 22 nF, 50 V, 10%, X7R, 0402 0402 Std Std
C15, C16 2 10 µF CAP, CERM, 10 µF, 50 V, X7R, 1210 1210 CNA6P1X7R1H106K250AE TDK
C17 1 0.1 µF CAP, CERM, 0.1 µF, 10 V, 10%, X7R, 0402 0402 Std Std
C20 BSR173-001 1 1 nF CAP, CERM, 1 nF, 25 V, 10%, X7R, 0402 0402 Std Std
H1, H2, H3, H4 4 – Standoff, Hex, 0.5"L, #4-40, Nylon – 1902C Keystone
H5, H6, H7, H8 4 – Screw, Pan Head, 4-40, 3/8", Nylon – NY PMS 440 0038 PH B&F Fastener Supply
J1, J2 2 – Terminal block 2 POS 5 mm, TH – TSW-110-07-G-S Phoenix Contact
J3 1 – Header, 100 mil, 10 × 1, Gold, TH – TSW-110-07-G-S Samtec
L1 1 1 µH Shielded power inductor – XGL4020-102MEC Coilcraft
L2 1 0.76 µH Shielded power inductor – XGL4030-761MEC Coilcraft
R1 1 0 Ω RES, 0 Ω, 5%, 0.1 W, 0603 0603 Std Std
R2, R3, R10 3 100 kΩ RES, 100 kΩ, 1%, 0.063 W, 0402 0402 Std Std
R4 1 1 Ω RES, 1 Ω, 1%, 0.063 W, 0402 0402 Std Std
R5 1 10 Ω RES, 10 Ω, 1%, 0.063 W, 0402 0402 Std Std
R7 1 24.9 kΩ RES, 24.9 kΩ, 1%, 0.0.063 W, 0402 0402 Std Std
R8 1 255 kΩ RES, 255 kΩ, 1%, 0.0.063 W, 0402 0402 Std Std
R9 BSR173-002 1 0 Ω RES, 0 Ω, 5%, 0.1 W, 0402 0402 Std Std
R11 BSR173-001 1 6.04 kΩ RES, 6.04 Ω, 1%, 0.063 W, 0402 0402 Std Std
BSR173-002 1 100 kΩ RES, 100 kΩ, 1%, 0.063 W, 0402 0402 Std Std
SH-J3 1 – Shunt, 100 mil, gold plated, black Shunt 2 pos. 0.1" 881545-2 TE Connectivity
TP1, TP2, TP3, TP4 4 – Test point, miniature, SMT – 5019 Keystone
U1 BSR173-001 1 – 36-V, 6-A buck converter with EN/SYNC and RT VQFN-FCRLF (22) LM63460AASQRYFRQ1 Texas Instruments
BSR173-002 36-V, 6-A buck converter with EN and MODE/SYNC LM64460APPQRYFRQ1