DS2790G+T&R Maxim Integrated Products, DS2790G+T&R Datasheet - Page 35

• Manufacturer Part Number: DS2790G+T&R
• Description: IC FUEL GAUGE BATT 28-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2790G+T&R

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

offending charge current source. The Charge V
Configuration register.
Discharge Overcurrent, DOC. If V
external discharge FET and sets the DOCF bit in the protection register. The discharge current path is not re-
established until the voltage on PLS rises above V
V
programmable through the DOCT bits of the ADC Configuration register.
Short Circuit, SC. If the voltage on the SNS2 pin with respect to SNS1 exceeds short-circuit threshold V
period longer than short-circuit delay t
the protection register. The discharge current path is not re-established until the voltage on PLS rises above V
V
short circuit. The V
is programmable through the SCDT bit of the ADC Configuration register. If a short circuit event collapses V
secondary short circuit protection function disables the discharge FET within a period of t
Charge/Discharge Over-/Undertemperature, DOT, DUT. Assuming no other fault conditions, the CC pin is
enabled when the temperature is greather than T
temperature is greater than T
control pins are enable. There is no hysteresis or delay period associated with temperature protection.
Temperature protection must be enabled by user code by setting the TLIME bit. Over-/Undertemperature limits are
defined by TLIM0 and TLIM1 bits located in password protected memory.
Figure 18. Lithium-Ion Protection Circuitry Example Waveforms
Summary. All of the protection conditions described above are AND’ed together with temperature protection
functions to affect the CC and DC outputs.
DD
TP
DISCHARGE
. The DS2790 provides a test current of value I
to PLS to pull PLS up to detect the removal of the offending low-impedance load. The Discharge V
CHARGE
DC = (Undervoltage) and (Overcurrent, Either Direction) and (Short Circuit) and (Discharge
NOTE 1: TO ALLOW THE DEVICE TO REACT QUICKLY TO SHORT CIRCUITS, DETECTION OCCURS ON THE SNS PIN RATHER THAN ON THE
FILTERED IS1 AND IS2 PINS. THE ACTUAL SHORT-CIRCUIT DETECT CONDITION IS V
V
UVF
CELL
Overtemperature if enabled) and (Discharge Undertemperature if enabled) and (DE = 1) and SLEEP
CC
DC
V
IS
SC
t
OVD
limit is programmable through the DOCT bits of the ADC Configuration register. The t
t
DH
SCD
, or less than or equal to T
IS
SCD
(NOTE 1)
is less than -V
, the DS2790 shuts off the external discharge FET and sets the SCF bit in
t
OVD
CH
OC
TST
DD
, or less than or equal to T
t
35 of 41
limit is programmable through the COCT bits in the ADC
OCD
- V
OC
from V
TP
for a period longer than t
. The DS2790 provides a test current of value I
DL
DD
. When the temperature is inside these ranges, both
to PLS to pull PLS up to detect the removal of the
t
OCD
SNS2
- V
SNS1
CL
. The DC pin is disabled when the
> V
SC1
OCD
.
t
UVD
, the DS2790 shuts off the
SSCD.
-V
V
V
V
V
V
-V
V
V
V
0
PLS
OV
CE
UV
OC
CP
DD
CP
OC
SC
OC
SC1
TST
SCD
limit is
DD
for a
from
limit
DD
, a
-