M1-SYSMGMT-DEV-KIT-FP3 Actel, M1-SYSMGMT-DEV-KIT-FP3 Datasheet - Page 27

• Manufacturer Part Number: M1-SYSMGMT-DEV-KIT-FP3
• Description: MCU, MPU & DSP Development Tools System Management Development Kit
• Manufacturer: Actel

Specifications of M1-SYSMGMT-DEV-KIT-FP3

• Processor To Be Evaluated: AFS1500-FG484
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Charging and Discharging Routines
Temperature Monitoring
Battery Backup
Test Points
M1 System Management Board User’s Guide
The battery is charged/discharged using the two FET controls
Off, the constant current source (20 mA) will slowly charge up the 7.2 V battery. When Q3 is turned Off and Q2 is
turned On, the battery is placed in discharge mode and will power up the board and start discharging. All voltages and
current are monitored by the M1AFS1500-FG484 device. A number of algorithms can be designed in the M1AFS
device for implementing the charging and discharging routines of the battery.
For demonstration purposes, you can discharge the battery and place a jumper on JP3. This adds an extra 110 Ω load to
the battery output voltage.
Note:
Connect a temperature diode to header JP5 to monitor battery temperature. Charging/discharging algorithms monitor
battery temperature.
If you need a constant battery backup without any discharging algorithms in the M1AFS1500-FG484 device, place a
jumper to JP27. This keeps Q2 On and puts the battery in discharge mode. Both the power brick and the battery are
connected, but the power brick powers up the board automatically because the power brick is at a higher voltage than the
battery. If the power brick is pulled out in the middle of operation, the battery supply takes over with no interruptions.
Table 2-21
The above figure is not a complete representation of the board schematics.
TP1
TP2
TP3
and
Power
Input
Table 2-22
Current Source
show various test points provided across the board, and how to access them.
Test Points
Constant
Figure 2-13. Charging and Discharging Routines
Table 2-21 · Test Points by Numerical Sequence
AG
Q3
AV
AC
(Figure
M7AFS
7.2V Battery
2-13). When Q3 is turned On and Q2 is turned
AG
Signal Name
Digital GND
Digital GND
Digital 3.3 V
Q2
AV
AC
Battery Ouput
Power
Test Points
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