BQ2040SN-C408 BENCHMARQ, BQ2040SN-C408 Datasheet - Page 23

• 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

EEPROM
length
EEPROM check 1
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
Reserved
Current
overload
Battery low %
Description
Byte
0x00
0x01
0x02
0x04
0x06
0x08
0x0a
0x0e
0x10
0x12
0x14
0x16
0x18
0x1a
0x1e
0x2e
Low
0x0c
0x1c
0x2c
EEPROM
Address
High
Byte
0x03
0x05
0x07
0x09
0x0b
0x0d
0x11
0x13
0x15
0x17
0x19
0x1b
0x1d
0x2d
0x0f
0x1f
Hex Contents
Byte
Low
Table 10. Example Register Contents
64
5b
0a
00
60
d8
80
00
60
40
10
a1
12
60
00
00
70
08
f0
EEPROM
High
Byte
00
00
00
09
40
00
00
09
38
00
20
27
09
00
00
17
May 1, 1996
10 minutes Sets the low time alarm level.
2400mAh
14400mV
Example
16600mV
240mAh
2400mA
2400mA
6000mA
Values
= 8353
10002
0mA
100
128
1.0
3%
91
0
0
0
23
Must be equal to 0x64.
Must be equal to 0x5b.
Sets the low capacity alarm level.
Not currently used by the bq2040.
Sets the initial charge request.
Used to set the fast-charge voltage for the Smart
Charger.
Initializes BatteryStatus.
Contains the charge cycle count and can be set to zero
for a new battery.
Normal battery pack capacity.
Nominal battery pack voltage.
Default value for this register in a 1.0 part.
Packed per the ManufactureDate description.
Contains the optional pack serial number.
Used to set the fast-charge current for the Smart
Charger.
Contains the desired maintenance current after fast-
charge termination by the bq2040.
Must be programmed to 0x00.
Sets the discharge current at which EDV threshold
monitoring is disabled.
Sets the battery capacity that RemainingCapacity is
reduced to at EDV1. The value equals 2.56
EDV1)
Notes
bq2040
(%RM at