MAX11080 Datasheet, PDF (22/27 Pages) Maxim Integrated Products – 12-Channel, High-Voltage Battery-Pack Fault Monitor

12-Channel, High-Voltage Battery-Pack
Fault Monitor
Table 4. FEMA Analysis (Note 5)
PIN
NUMBER
1
2
3
4
5
6
7
NAME
ACTION
EFFECT
DCIN
HV
N.C.
C12
C11
C10
C9
Open (or Disconnected)
Short to Pin 2
Open (or Disconnected)
Short to Pin 3
Open (or Disconnected)
Short to Pin 4
Open (or Disconnected)
ALRM_L goes high (see Note 6).
ALRM_L goes high.
ALRM_L goes high.
No effect.
No effect.
No effect.
• If open occurs before power-up, the part works as if C12 does not exist
because the internal circuit detects the situation and assumes it is what the
application intended to do. The monitoring of C12 to C11 is disabled and is
not enabled even if the pin is reconnected.
• If open occurs after power-up, it is considered a zero voltage input. ALRM_L
goes high when the undervoltage is enabled.
Short to Pin 5
• If short occurs before power-up, the part works as if C12 does not exist
because the internal circuit detects the situation and assumes it is what the
application intended to do. The monitoring of C12 to C11 is disabled and is
not enabled even if the short is removed.
• If short occurs after power-up, the situation is treated as a zero voltage input
for C12 to C11. ALRM_L goes high when the undervoltage is enabled.
Open (or Disconnected) ^{ALRML goes high because it causes an overvoltage to the affected input pair}
even if the overvoltage is set to the maximum.
Short to Pin 6
Open (or Disconnected)
Short to Pin 7
Open (or Disconnected)
Short to Pin 8
• If short occurs before power-up, the part works as if C11 does not exist
because the internal circuit detects the situation and assumes it is what the
application intended to do. The monitoring of C11 to C10 is disabled and is
not enabled even if the short is removed.
• If short occurs after power-up, the situation is treated as a zero voltage input
for C11 to C10. ALRM_L goes high when the undervoltage is enabled.
ALRM_L goes high as it causes an overvoltage to the affected input pair even if
the overvoltage is set to the maximum.
• If short occurs before power-up, the part works as if C10 does not exist
because the internal circuit detects the situation and assumes it is what the
application intended to do. The monitoring of C10 to C9 is disabled and is
not enabled even if the short is removed.
• If short occurs after power-up, the situation is treated as a zero voltage input
for C10 to C9. ALRM_L goes high when the undervoltage is enabled.
ALRM_L goes high as it causes an overvoltage to the affected input pair even if
the overvoltage is set to the maximum.
• If short occurs before power-up, the part works as if C9 does not exist
because the internal circuit detects the situation and assumes it is what the
application intended to do. The monitoring of C9 to C8 is disabled and is not
enabled even if the short is removed.
• If short occurs after power-up, the situation is treated as a zero voltage input
for C9 to C8. ALRM_L goes high when the undervoltage is enabled.
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