参数资料
型号: EVAL-ADM1186-1MBZ
厂商: Analog Devices Inc
文件页数: 17/28页
文件大小: 0K
描述: KIT MICRO EVALUATION ADM1186-1
标准包装: 1
主要目的: 电源管理,电源监控器/跟踪器/序列发生器
已用 IC / 零件: ADM1186-1
Data Sheet
AUTOMATIC STARTUP AND AUTOMATIC RETRY
USING A SUPPLY RAIL
It is not possible to directly connect the V CC supply to the UP
pin (ADM1186-1) or to the UP/DOWN pin (ADM1186-2) to
start a sequence as the V CC comes up. When the UVLO circuit
enables the state machine, it begins in the fault handler states.
To reach the WAIT START state so that sequencing can begin,
the UP pin (ADM1186-1) or the UP/DOWN pin (ADM1186-2)
must be held low after the state machine is enabled. The circuit
shown in Figure 28 can be used to make the ADM1186-1
automatically start and automatically retry in the event of fault.
R H
ADM1186
When a fault occurs and the fault hold time elapses, the state
machine enters the CLEAR FAULT state. The ADM1186-1
remains in this state until a low voltage is applied at the UP pin.
The low voltage at the FAULT pin causes the voltage at the node
of the UP and DOWN pin connection to fall. This allows the
state machine to advance from the CLEAR FAULT state, in
readiness for a new power-up sequence. The FAULT pin is then
asserted high followed by the UP pin after a delay set by C DELAY .
5V
R1
ADM1186-1
UP
5V
100k?
OUT1
5V
C DELAY
R2
DOWN
STATE
MACHINE
100k?
FAULT
1.4V
Figure 28. Configuration for Automatic Startup and Retry after Fault
Rev. B | Page 17 of 28
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