BQ2040SN-C408 BENCHMARQ, BQ2040SN-C408 Datasheet - Page 4

• Manufacturer Part Number: BQ2040SN-C408
• Description: BATTERY CHARGE MONITOR, SMD, 2040
• Manufacturer: BENCHMARQ

Specifications of BQ2040SN-C408

• Battery Management Function: Charger, Status Monitor
• Battery Type: Li-Ion / NiCd / NiMH
• Supply Voltage Range: 3V To 6.5V
• Battery Ic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: 0°C
• Interface Type: 2-Wire, Serial

bq2040
EEPROM length
EEPROM check1
Remaining time alarm
Remaining capacity alarm
Reserved
Initial charging current
Charging voltage
Battery status
Cycle count
Design capacity
Design voltage
Specification information
Manufacture date
Serial number
Fast-charging current
Maintenance-charge current 0x1c/0x1d Sets the trickle current request
Reserved
Manufacturer name
Current overload
Battery low %
Reserved
Device name
Li-Ion taper current
Maximum overcharge limit
Reserved
Access protect
FLAGS1
FLAGS2
Device chemistry
Current measurement gain
Battery voltage offset
Temperature offset
Maximum temperature and
T step
Parameter Name
0x20-0x2b Programs ManufacturerName (0x20)
0x30-0x37 Programs DeviceName (0x21)
0x40-0x45 Programs DeviceChemistry (0x22)
0x02/0x03 Sets RemainingTimeAlarm (0x02)
0x04/0x05 Sets RemainingCapacityAlarm (0x01)
0x06/0x07 Reserved for future use
0x08/0x09 Sets the initial charging current
0x0a/0x0b Sets ChargingVoltage (0x15)
0x0c/0x0d Initializes BatteryStatus (0x16)
0x10/0x11 Sets DesignCapacity (0x18)
0x12/0x13 Sets DesignVoltage (0x19)
0x14/0x15 Programs SpecificationInfo (0x1a)
0x16/0x17 Programs ManufactureDate (0x1b)
0x18/0x19 Programs SerialNumber (0x1c)
0x1a/0x1b Sets ChargingCurrent (0x14)
0x2c/0x2d Sets the overload current threshold
0x38/0x39
0x3a/0x3b Sets the maximum amount of overcharge
0x46/0x47 Sense resistor calibration value
0x0e/0x0f Initializes and stores CycleCount (0x17)
0x1e/0x1f Reserved must = 0x0000
Address
0x00
0x01
0x2e
0x3d
0x3e
0x48
0x49
0x4a
0x3c
0x2f
0x3f
Table 1. Configuration Memory Map
Number of EEPROM data locations
must = 0x64
EEPROM data integrity check byte, must = 0x5b
Sets the battery low amount
Reserved for future use
Sets the upper limit of the taper current for charge
termination
Reserved must = 0x00
Locks commands outside of the SBS data set
Initializes FLAGS1
Initializes FLAGS2
Voltage calibration value
Temperature calibration value
Sets the maximum charge temperature and the T
step for T/ t termination
4
Description
Length
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
16 bits
96 bits
16 bits
64 bits
16 bits
16 bits
48 bits
16 bits
8 bits
8 bits
8 bits
8 bits
8 bits
8 bits
8 bits
8 bits
8 bits
8 bits
8 bits
minutes
cycles
Units
mAh
mAh
mAh
NA
NA
NA
mA
mV
NA
mV
NA
NA
NA
mA
mA
NA
mA
NA
NA
mA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
%