LTC4253 LINER [Linear Technology], LTC4253 Datasheet - Page 27

• Manufacturer Part Number: LTC4253
• Manufacturer: LINER [Linear Technology]

APPLICATIONS INFORMATION
PWRGD1
(12a) Momentary Circuit Breaker Fault
SENSE
TIMER
DRAIN
GATE
V
OUT
SS
CB FAULT
TIMER
SENSE
1
GATE
DRN
OV
SS
2
V
V
V
TMRH
ACL
CB
OV OVERSHOOTS V
1
V
V
OVHI
GATEL
Figure 12. Circuit Breaker Timing Behavior (All Waveforms Are Referenced to V
5μA
ACL
CB
V
V
+ V
+ V
Figure 11. Overvoltage Timing (All Waveforms Are Referenced to V
TMRH
OVLO
OS
OS
OS
OVHI
50μA
)
)
OV DROPS BELOW V
2 34
(V
OV
START-UP
FOR THE LTC4253A). GATE AND SS ARE PULLED DOWN, PWRGD SIGNALS AND TIMER ARE UNAFFECTED
GATE
5
DRN
50μA
6 7 8 9
OVLO
(V
PWRGD1
(12b) Circuit Breaker Time-Out
V
V
V
OV
SENSE
TIMER
DRAIN
IN
ACL
CB
GATE
V
– V
– V
OUT
SS
V
OVHST
GATEH
TMRH
5μA
CB TIMES-OUT
FOR THE LTC4253A), CHECK GATE < V
1
CB FAULT
DRN
V
DRNCL
2
V
V
ACL
CB
5μA
LTC4253/LTC4253A
4253 F11
GATEL
(12c) Multiple Circuit Breaker Fault
, SENSE < V
EE
PWRGD1
)
SENSE
TIMER
DRAIN
GATE
V
OUT
SS
EE
V
TMRH
CB
)
CB FAULT
1
DRN
2
CB TIMES-OUT
5μA
V
DRNCL
OS
CB FAULT
3
27
4
425353afe
V
V
ACL
CB
4253 F12