DS2784 Maxim Integrated Products, DS2784 Datasheet - Page 10

• Manufacturer Part Number: DS2784
• Description: 1-Cell Stand-Alone Fuel Gauge IC
• Manufacturer: Maxim Integrated Products

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Overcurrent, Charge Direction (COC). Charge current develops a negative voltage on V
V
DS2784 shuts off both external FETs and sets the COC flag in the protection register. The charge current path is
not re-established until the voltage on the PLS pin drops below V
(I
Overcurrent, Discharge Direction (DOC). Discharge current develops a positive voltage on V
V
the external discharge FET and sets the DOC flag in the protection register. The discharge current path is not re-
established until the voltage on PLS rises above V
PLS to pull PLS up in order to detect the removal of the offending low-impedance load.
Short Circuit. If V
DS2784 shuts off the external discharge FET and sets the DOC flag in the protection register. The discharge
current path is not re-established until the voltage on PLS rises above V
current of value (I
Figure 2. Li+ Protection Circuitry Example Waveforms
TST
SNS
SS
. If V
) from PLS to V
is less than the charge overcurrent threshold (V
SNS
exceeds the discharge overcurrent threshold (V
TST
SNS
SS
) from V
to pull PLS down in order to detect the removal of the offending charge current source.
exceeds short-circuit threshold V
DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
DD
to PLS to pull PLS up in order to detect the removal of the short circuit.
DD
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- V
COC
TP
SC
) for a period longer than overcurrent delay (t
. The DS2784 provides a test current (I
DOC
for a period longer than short-circuit delay (t
) for a period longer than t
DD
- V
TP
. The DS2784 provides a pulldown current
DD
- V
TP
. The DS2784 provides a test
OCD
SNS
, the DS2784 shuts off
with respect to V
SNS
TST
with respect to
) from V
OCD
SCD
), the
), the
DD
SS
. If
to