SLUUCO1 July   2022 BQ25172

 

  1.   BQ25172EVM Evaluation Module
  2.   Trademarks
  3.   3
  4. 1Introduction
    1. 1.1 Printed Circuit Board Assembly
    2. 1.2 I/O Descriptions
  5. 2Test Summary
    1. 2.1 Equipment
    2. 2.2 Cautions
    3. 2.3 Test Instructions
  6. 3Board Layout, Schematic, and Bill of Materials
    1. 3.1 Board Layout
    2. 3.2 Schematic
    3. 3.3 Bill of Materials
  7. 4Revision History

1.2 I/O Descriptions

Table 1-1 lists the input and output connections available on this EVM and their respective descriptions.

Table 1-1 EVM I/O Connections
I/O Connector Description
J1 – VIN / GND Input voltage from external power supply, recommended 5V. Max operating input voltage is 6.6V, OVP trip point. Max input voltage is 30V while in OVP.
J2 – OUT (BAT+) / GND (BAT-) / GND / TS Battery connection, TS should be 10k NTC but not needed.
JP1 – VSET ADJ Disable R9, default is installed.
JP2 – REG / IN / OUT Source voltage for housekeeping regulator, U2. Default Input voltage IN.
JP3 – TMR Connection to TMR pin
JP4 – ISET Sets Fast Charge Current. Fixed=400mA ADJ= R22 range 60mA to 600mA
JP5 - STAT LED Default setting is ON.
JP6 – TS NTC temp sensor. Fixed=10k (safe) ADJ=R19 range from 0 to 50k ohms. Default Fixed.
JP7 - TMR ADJ Bypasses R18 for TMR connection to S2
JP8 Not used, do not install
JP9 Not used, do not install

Table 1-2 lists the S1 switch positions for VSET and their respective descriptions. Use only one postion ON, do not combine.

Table 1-2 VSET S1 Switch Positions
Position / RX / Value NiMH Configuration
#1 / R1 / 27k ohm2-Cell + Intermittent
#2 / R2 / 24k ohm3-Cell
#3 / R3 / 18k ohm3-Cell + Intermittent
#4 / R4 / 11k ohm4-Cell + Intermittent
#5 / R5 / 6.2k ohm5-Cell + Intermittent
#6 / R6 / 4.7k ohm6-Cell
#7 / R7 / 3.6k ohm6-Cell + Intermittent
#8 / R8 / 0 ohmShort Circuit – No Charge
Table 1-3 TMR S2 Switch Positions
Position / RX / Value Charge Timer (HR)
#11 / R11 / 36k ohm 4hr
#12 / R12 / 18.2k ohm 10hr
#13 / R13 / 6.2k ohm 18hr
#14 / R14 / 0 ohm 0hr (Short-Circuit)