Microchip Technology MCP1631 Evaluation Board MCP1631RD-DCPC1 MCP1631RD-DCPC1 Data Sheet
Product codes
MCP1631RD-DCPC1
Demo Board Firmware
© 2009 Microchip Technology Inc.
DS51798A-page 27
C.3
SUMMARY DEVICE FIRMWARE FLOWCHART - NIMH/NICD CHARGER
For the latest version of the MCP1631HV Digitally Controlled Programmable Current
Source Reference Design NiMH/NiCd Charger firmware, visit our web site at
www.microchip.com.
Source Reference Design NiMH/NiCd Charger firmware, visit our web site at
www.microchip.com.
FIGURE C-3:
Summary NiMH/NiCd Charger Profile Flowchart.
START
Is V
BATT
Parameters, Timers;
No
Yes
Fast charge Mode
I
CHARGE
= 700 mA
dV/dt<-10mV
dT/dt>1.5C
Yes
TopOff Charge Mode
> 0.9V / Cell?
Precondition
Current Mode
Yes
No
Charge Timer = 1h
END
Fault
Initialize: Processor,
SampleADC()
Shutdown
S1 pressed?
No
Yes
ChargeTimer=0?
Shutdown
Yes
No
No
Shutdown
OVP
time retries
> 5
Yes
No
ChargeTimer=0?
No
Yes
Is V
BATT
> 1.8V / Cell?
Cell
temp > 40
o
C?
No
OTP
time retries
> 5?
Yes
No
Fault
Cell Temp
> 40°C?
Yes
No
Yes
OVP?
OTP
time retries
> 5
?
Yes
No
Fault
No
Yes