Datasheet

Installation and Operation
© 2009 Microchip Technology Inc. DS51791A-page 11
2.3.1.4 STATUS LED
The MCP1631HV Multi-Chemistry Battery Charger has an LED to indicate charge
status or fault status. Table 2-1 represents the state of the Status, Chemistry, and
Display LEDs during various states of the charge cycle.
TABLE 2-1: LED INDICATOR TABLE
Mode Status Li-Ion NiMH LSBit 0 Bit 1 Bit 2 MSBit 3
Power-Up OFF CHEM CHEM #CELLS #CELLS #CELLS #CELLS
Enter Config OFF ON ON ON ON ON ON
Config 4Hz CHEM CHEM #CELLS #CELLS #CELLS #CELLS
Calibrated 4Hz OFF OFF ON ON ON ON
Off OFF CHEM CHEM #CELLS #CELLS #CELLS #CELLS
Charging ON 1/2 Hz CHEM 1/2 Hz CHEM #CELLS #CELLS #CELLS #CELLS
Fault FLASH CHEM CHEM #CELLS #CELLS #CELLS #CELLS
Fault-OV 2Hz CHEM CHEM #CELLS #CELLS #CELLS #CELLS
Fault-OT 1Hz CHEM CHEM #CELLS #CELLS #CELLS #CELLS
Term. Code
(#CELLS pressed)
No Change No Change No Change ΔV/Δt ΔT/ΔtOVP OTP
State Code
(CHEM pressed)
No Change No Change No Change STATE LS
Bit 0
STATE Bit
1
STATE Bit
2
STATE MS
Bit 3
TABLE 2-2: WHEN ‘CHEM’ SWITCH IS PRESSED, SHOWS CURRENT STATE
State Code LSBit 0 Bit 1 Bit 2 MSBit 3
Startup 1 0 0 0
ON 0 1 0 0
Qualification 1 1 0 0
NiMH CC 0 0 1 0
NiMH Topoff 1 0 1 0
Li-Ion CC 0 1 1 0
Li-Ion CV 1 1 1 0
LED CC 0 0 0 1
Overvoltage 1 0 0 1
Off 0 1 0 1