SLUAAG9 September   2021 BQ25170 , BQ25171-Q1 , BQ25175

 

  1.   Trademarks
  2. 1Introduction
  3. 2BQ25171-Q1 Design Decisions
  4. 3700 mA/70 mA Variable Charge Current Li-Ion Fast Charge Design
  5. 4200 mA Time Charge 3S NiMH Design
  6. 545 mA Fast Charge LiFePO4 Design
  7. 6Pin Configuration
  8. 7R-ISET Common Values
  9. 8Common Questions: Tips and Tricks

6 Pin Configuration

Table 6-1 provides a summary of the pins on the device.

Table 6-1 BQ25171-Q1 Pin Configuration
Pin - Name I/O Description Comments
Pin 1 – IN P Input power supply Operating range to 18 V, Absolute Max 40 V
Pin 2 – ISET I Resistor R-ISET sets fast charge current ICHG = K-ISET/R-ISET, K-ISET= 300 AΩ, 375 Ω = 800 mA
Pin 3 – CE I Active Low Charge Enable pin, IC in shutdown mode when CE is high IC enabled by default when pin is floating
Pin 4 – TS I Battery temperature input, connect a 10 kΩ NTC thermistor Connect 10 kΩ resistor from TS to gnd if TS function is not used
Pin 5 – GND - Ground terminal
Pin 6 – CHM_TMR I Resistor R-CHM_TMR sets chemistry and charge time Resistor range 3.6 kΩ to 100 kΩ
Pin 7 – STAT1 O Open drain charge status
Pin 8 – STAT2 O Open drain charge status
Pin 9 – VSET I Resistor R-VSET sets out pin regulation voltage Resistor range 3.6 kΩ to 100 kΩ
Pin 10 – OUT P Battery/ system load connection
Thermal Pad - Exposed thermal pad Connect thermal pad to board gnd plane