SFFS376 May   2022 BQ25170

 

  1.   Trademarks
  2. 1Pin FMA Description
  3. 2Pin Configurations and Functions
  4. 3Pin Failure Mode Analysis (Pin FMA)

3 Pin Failure Mode Analysis (Pin FMA)

Table 3-1 Pin FMA Analysis for Pin Floating
Pin Open
Number Name Damage Functionality Comments
1 IN NO NO No power to part
2 ISET NO NO No charge current (ISET configured for 0 ma) - STAT ON.
3 TS NO NO Device will enter cold fault shutdown - STAT Blink.
4 GND NO NO No return path for input voltage, not operational.
5 STAT NO YES Normal charging operation but no status indication.
6 /PG NO YES Normal charging operation but no power good indication.
7 VSET NO NO Open is fault condition
8 OUT NO NO Device will cycle between charge complete and recharge - STAT Blink.
Table 3-2 Pin FMA Analysis for Pin Short Circuit to Next Pin
Pin Shorted to Next Pin
Number Name Number Name Damage Functionality Comments
1 IN 2 ISET NO NO No charge current (ISET configured for 0 mA) - STAT ON.
2 ISET 3 TS NO NO TS low shutdown or temp fault
3 TS 4 GND NO NO Shutdown condition
5 STAT 6 /PG NO YES Normal charging operation but /PG and STAT not functional.
6 /PG 7 VSET NO NO Low /PG will trip VSET fault
7 VSET 8 OUT NO NO Hi will trip VSET fault
Table 3-3 Pin FMA Analysis for Pin Short Circuit to Ground
Pin Short to GND
Number Name Damage Functionality Comments
1 IN NO NO No power to part. Main supply shorted.
2 ISET NO NO Fault condition
3 TS NO NO Shutdown condition
4 GND NO YES Normal operation
5 STAT NO YES Normal charging operation but no status indication.
6 /PG NO YES Normal charging operation but no power good indication.
7 VSET NO NO No change during current charging cycle. Upon starting next charge cycle, configuration pin will detect fault and prevent charging. Nonrecoverable fault signaled through STAT pin.
8 OUT NO NO OUT current limited to 16 mA - Short on battery.
Table 3-4 Pin FMA Analysis for Pin Short Circuit to Supply
Pin Short to Supply
Number Name Damage Functionality Comments
1 IN NO YES Normal charging operation
2 ISET NO NO No charge current (ISET configured for 0 ma) - STAT ON, potential for damage(1).
3 TS NO NO Device will enter cold fault shutdown, potential for damage(1).
4 GND NO NO No power to part. Main power supply shorted.
5 STAT YES NO Normal charging STAT, potential for damage(1).
6 /PG YES NO Normal charging /PG, potential for damage(1).
7 VSET NO NO Fault condition, potential for damage(1).
8 OUT NO NO Fault contition - Vout OVP, potential for damage(1).
(1) Test conditons with supply at 5 V (typical value). Voltage above pin absolute maximum (5.5 V) can damage device.