Diodes AUR9801C - Manual (Page 10)

Data Sheet
Li-ion/Li Polymer Battery Charger AUR9801C
Aug. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
10
Operation Overview
For linear charging case, the AUR9801C performs
either constant current (CC) and constant voltage
(CV) profiles. The charging current is set by an
external resistor up to 1A for package options. The
target charging voltage is 1% accurate over the
specified range. AUR9801C enters a trickle mode for
preconditioning operation each time when a charging
cycle starts till that the minimum charging voltage is
reached and verified in 15 clock cycles.
A thermal-feedback function offers thermal
protection during linear charging operations. When
the die temperature of AUR9801C goes up above 107
degree C, the charger automatically reduces the
charging current.
AUR9801C provides a TIMEOUT limit to prevent
charging a dead battery for extensive time.
Recharging is automatically started when battery
voltage drops to the recharging threshold point.
AUR9801C enters the shutdown mode in case no
voltage adapter is attached.
/STATUS /FAULT Condition
High High
Power-down,
charging is suspended
or interrupted
Low High Charging
High Low
Bad battery
(Safety timer expired)
Charge current setting
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
× =
IREF
5
CHG R
10
0.8 I Where R
IREF
in KΩ
Charge timer setting
nF
C
Time time
1
14 × =
Where Time in Minutes