XC6801A421MR-G Torex Semiconductor Ltd, XC6801A421MR-G Datasheet - Page 5

• Manufacturer Part Number: XC6801A421MR-G
• Description: 55T4029
• Manufacturer: Torex Semiconductor Ltd

Specifications of XC6801A421MR-G

• Battery Type: Li-Ion
• Input Voltage: 6V
• Battery Charge Voltage: 2.9V
• Charge Current Max: 500mA
• Battery Ic Case Style: SOT-25
• No. Of Pins: 5
• No. Of Series Cells: 1
• Operating Temperature Range: -40°C
• Rohs Compliant: Yes

■OPERATIONAL DESCRIPTION
<Charge Cycle>
If the BAT pin voltage is less than 2.9V, the charger enters trickle charge mode. In this mode, a safe battery charge is possible
because approximately only 1/10 of the charge current is supplied to the battery. When the BAT pin voltage rises above 2.9V,
the charger enters constant-current mode (CC mode) and the battery is charged by the programmed charge current. When
the BAT pin voltage reaches 4.2V, the charger enters constant-voltage mode (CV mode) automatically. After this, the charge
current starts to drop and when it reaches a level which is 1/10 of the programmed charge current, the charge terminates.
<Setting Charge Current>
The charge current can be set from 475mA（TYP.）or 95mA（TYP.）by the LIM pin.
LIM ”H” level input：475mA（TYP.）
LIM ”L” level input：95mA（TYP.）
<Charge Termination>
The battery charge is terminated when the charge current decreases to 1/10 of the full charging level after the battery pin
voltage reaches a float voltage. An internal comparator monitors the I
the comparator sees that the I
A driver transistor turns off during the stand-by mode.
<Automatic Recharge>
In stand-by mode battery voltage falls. When the voltage level at the battery pin drops to 4.05V or less, the charge cycle
automatically re-start after a delay of 1.7ms. As such, no external activation control is needed.
Constant-Current Charge (CC)
Constant-Voltage Charge (CV)
VLIM-“H” IBAT≦IBAT1/10
VLIM-“L” IBAT≦IBAT1/10
Charge Termination
(Stand-by mode)
Trickle Charge
(Charge Main Routine)
Maintaining the charge state
during a charge termination
detect time (1ms)
Maintaining the stand-by mode
during a recharge time (2ms)
Charge Cycle
SEN
pin voltage is less than 1.2ms (charge termination detect time), the IC enters stand-by mode.
Input Voltage Monitor (UVLO)
Charge Cycle
Shut-Down
SEN
pin voltage to detect the charge termination. When
Failure Detection
VIN-BAT Voltage Monitor (UVLO)
Charge Cycle
Shut-Down
XC6801
Series
5/18