DS2437S-3/T&R Maxim Integrated Products, DS2437S-3/T&R Datasheet - Page 8

• Manufacturer Part Number: DS2437S-3/T&R
• Description: IC MONITOR SMART BATTERY 16-SSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS2437S-3/T&R

• Function: Battery Monitor
• Battery Type: Smart Batteries
• Voltage - Supply: 2.7 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3. The CCA/DCA will accumulate charging/discharging current, and the counter information will be
Because the user has read/write access to the entire EEPROM array, including the CCA/DCA locations,
the user’s software should never allow a write to memory page 07h if the CCA/DCA are used; otherwise
CCA/ DCA information will be overwritten.
Figure 2 below illustrates the activity of the ICA, CCA, and DCA over a sample charge/discharge cycle
of a battery pack, assuming the DS2437 is configured for the ICA to function and the CCA/DCA to
function and shadow data to EEPROM. To simplify the illustration of the accumulators, they are treated
as analog values, although they are digital counters in the DS2437. Note that when the battery becomes
fully discharged, i.e., the ICA value reaches 0, the CCA and DCA register values are maintained.
CCA/DCA Data Relationships Table 5
CURRENT ACCUMULATOR ACTIVITY Figure 2
shadowed to EEPROM each time the respective counter increments by 0.32C. The memory location
is reserved for the CCA/DCA, and the entire page SHOULD NOT be written to.
CCA/DCA
20,971
100C
32C
64C
0C
DIGITAL OUTPUT (Binary)
0000 0000 0000 0000
0000 0000 0110 0100
0000 0000 1100 1000
0010 0001 0011 1000
1111 1111 1111 1111
8 of 31
DIGITAL OUTPUT (Hex)
00C8h
FFFFh
0000h
0064h
0138h
DS2437