LM5068MM-1 National Semiconductor, LM5068MM-1 Datasheet - Page 21

• Manufacturer Part Number: LM5068MM-1
• Description: HOT SWAP CONTROLLER 48V, SMD, 5068
• Manufacturer: National Semiconductor

Specifications of LM5068MM-1

• Applications: Central Office Switching, Electronic Circuit Breaker
• Input Voltage: -90V
• Internal Switch: Yes
• Supply Voltage Range: -10V To -90V
• Digital Ic Case Style: MSOP
• No. Of Pins: 8
• Operating: RoHS Compliant

Timing Diagrams
Figure 11 shows the timer behavior for LM5068-2, -4 during
fault re-try time. During normal operation, whenever the
SENSE pin exceeds the 50mV, circuit breaker fault limit, the
timer capacitor begins to charge. If the TIMER pin voltage
exceeds 4V, the GATE is pulled down immediately, and
LM5068-2, -4 disconnects power to the load. The TIMER
(Continued)
FIGURE 11. Shutdown Cooling Timing Behavior
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starts the fault re-try cycle by discharging C
the V
the V
discharging phases, LM5068-2, -4 initiates an automatic
retry start-up cycle.
TLVT
THVT
threshold. The TIMER then charges C
threshold. After eight charging phases and nine
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with 30mA to
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with 6µA to