XC6801A421MR-G Torex Semiconductor Ltd, XC6801A421MR-G Datasheet - Page 6

• 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

<Charge Condition Status>
The /CHG pin constantly monitors the charge states classified as below:
6/18
<Connection of Shorted BAT Pin>
Even if the BAT pin is shorted to V
current.
<Under-voltage Lockout (UVLO)>
The UVLO circuit keeps the charger in shut-down mode until the input voltage, V
in order to protect the battery charger, the UVLO circuit keeps the charger in shut-down mode when the voltage between the
input pin voltage and BAT pin voltage falls to less than 30mV. The charge will not restart until the voltage between the input pin
voltage and BAT pin voltage rises more than 100mV. During shut-down mode, the driver transistor turns off but a failure
detection circuit operates, and supply current is reduced to 8μA.
<Soft-Start Function>
To protect against inrush current from the input to the battery, soft-start time is optimized and internally set (150μs, TYP.).
<Backflow Prevention Between the BAT Pin and the VIN Pin>
A backflow prevention circuit protects against current flowing from the BAT pin to the V
higher than the V
●Strong pull-down: I
●Weak pull-down: I
●High impedance: in shutdown mode.
■OPERATIONAL EXPLANATION (Continued)
XC6801
IN
pin voltage.
/CHG
/CHG
Series
=20μA (TYP.) in a stand-by mode,
=10mA (TYP.) in a charge cycle,
SS
, a trickle charge mode operates in order to protect the IC from destruction caused by over
IN
, rises above the UVLO voltage. Moreover,
IN
pin even if the BAT pin voltage is