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AD5100 Fiches technique(PDF) 10 Page - Analog Devices

No de pièce AD5100
Description  System-Management IC with Programmable Quad Voltage Monitoring and Supervisory Functions
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

AD5100 Fiches technique(HTML) 10 Page - Analog Devices

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AD5100
Preliminary Technical Data
Rev. PrJ | Page 10 of 32
THEORY OF OPERATION
The AD5100 is a Programmable System Management IC that
has four channels of monitoring inputs. Two inputs have high
voltage (30V) capability. For example if the AD5100 is used in
the automotive application, the V1MON (Monitoring Input 1)
should be the battery and the V2MON should either be the
ignition switch or the pseudo CAN bus wake up signal input.
Two other inputs, V3MON and V4MON, are low voltage for 0.9V,
1.8V, 2.5V, 3.3V, or 5V monitoring. The two high voltage inputs
control the shutdown signal, SHDN , while the two low voltage
inputs control the reset signal, RESET . The SHDN and RESET
are both disabling functions for the external devices. The
differences are output levels and driving capabilities that will be
described later. In some cases the SHDN and RESET may be
used interchangeably. The WDI (Watchdog) and MR (Manual
Reset) inputs also control RESET output for external digital
processor. Figure 4 shows the general flow chart and Table 7
summarizes the AD5100 functions and features.
* See Table 9 RESET Configuration Register:
If [0] = 0, then SHDN =0 and RESET = 0
If [0] = 1, then SHDN =0 and RESET = 1
V
1MON>UV
yes
No
SHDN=0*
V
1MON<OV
yes
SHDN=0*
V
2MON>ON
yes
No
SHDN=0
V
2MON>OFF
yes
SHDN=0
No
V
3MON>
Threshold
yes
No
RESET=0
V
4MON>
Threshold
yes
RESET=0
Valid WDI
yes
No
RESET=0
MR=1
yes
RESET=0
No
No
No
V
2MON
Level
Sensitive
Selected
yes
Using V
4OUT
for PWM
yes
No
V
4MON>
Threshold
yes
V
4OUT=0
No
V
4OUT=1
Standard
WDI Selected
yes
No (Advance WDI Selected)
Continue
Monitoring
Valid WDI
No
RESET=0
SHDN=0
yes
No (V
2MON Rising Edge Sensitive Selected)
Floating
WDI Disabled
yes
No
Floating WDI
No
RESET=0
yes
V
4MON
Disabled
yes
No
Default Paths
SHDN=1
* See Table 9 RESET Configuration Register:
If [0] = 0, then SHDN =0 and RESET = 0
If [0] = 1, then SHDN =0 and RESET = 1
V
1MON>UV
yes
No
SHDN=0*
V
1MON<OV
yes
SHDN=0*
V
2MON>ON
yes
No
SHDN=0
V
2MON>OFF
yes
SHDN=0
No
V
3MON>
Threshold
yes
No
RESET=0
V
4MON>
Threshold
yes
RESET=0
Valid WDI
yes
No
RESET=0
MR=1
yes
RESET=0
No
No
No
V
2MON
Level
Sensitive
Selected
yes
Using V
4OUT
for PWM
yes
No
V
4MON>
Threshold
yes
V
4OUT=0
No
V
4OUT=1
Standard
WDI Selected
yes
No (Advance WDI Selected)
Continue
Monitoring
Valid WDI
No
RESET=0
SHDN=0
yes
No (V
2MON Rising Edge Sensitive Selected)
Floating
WDI Disabled
yes
No
Floating WDI
No
RESET=0
yes
V
4MON
Disabled
yes
No
Default Paths
SHDN=1
Figure 4. General Flow Chart
Table 7. AD5100 Functions and Features
Input
Monitoring
Range
Shutdown
Control
Reset
Cont
rol
Fault
Dete
ction
Functions and Features
If Not Used
V1MON
6 – 30 V
Over/Under Voltage
Does not apply
V2MON
3 – 30 V
On/Off Voltage
Tie to V1MON, Min Input
CAN Bus Wake Up
V3MON
2.5 – 5.0 V
Connect to VOTP and
Threshold to Minimum
V4MON
0.9 – 3.3 V
Additional Output
Select Disable in Threshold
WDI
0 – 5 V
Standard, Advance, or
Leave Floating
Watchdog Selectable


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