X3100V28T1 Intersil, X3100V28T1 Datasheet - Page 15

• Manufacturer Part Number: X3100V28T1
• Description: IC PROTECT/MONITOR 4CELL 28TSSOP
• Manufacturer: Intersil

Specifications of X3100V28T1

• Function: Battery Monitor
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 6 V ~ 24 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 20. Over-charge Protection Mode—Event Diagram Description
Event
[0,1)
(1,2)
(2,3)
[1]
[2]
[3]
— Discharge FET is ON (UVP/OCP = V
— Charge FET is ON (OVP/LMON = V
— All cell voltages (V
— The device is in normal operation mode (i.e. not in a protection mode).
— The voltage of one or more of the battery cells (V
— The internal over-charge detection delay timer begins counting down.
— The device is still in normal operation mode
— Therefore, the internal over-charge sense circuitry switches the charge FET OFF (OVP/LMON=Vcc).
— The device has now entered over-charge protection mode.
— The battery cells are permitted to discharge via the discharge FET, and diode D
— The X3100 or X3101 monitors the voltages V
— (It is possible to change the status of UVP/OCP or OVP/LMON using the control register)
— All cell voltages fall below V
— The X3100/X3101 automatically switches charge FET = ON (OVP/LMON = Vss)
— The status of the discharge FET remains unaffected.
— Charging of the battery cells can now resume.
below the “Return from over-charge threshold” (V
The internal over-charge detection delay timer continues counting for T
15
CELL
The internal over-charge detection delay timer times out
- V
CELL4
OVR
—The device is now in normal operation mode.
) are below the over-charge voltage threshold (V
While in over-charge protection mode:
SS
SS
X3100, X3101
), and hence battery cells are permitted to receive charge.
V
).
CELL
Event Description
CELL1
still exceeds V
AND
CELL
OVR
- V
).
), exceeds V
CELL4
to determine whether or not they have all fallen
OV.
OV
.
2
OV
OV
across the charge FET
).
seconds.
January 3, 2008
FN8110.1