AIC1783
R
TIMER
(KΩ)
11
23
48
74
100
152
206
314
491
667
OSC.
Freq.(KHz)
262.4
131.2
65.6
43.7
32.8
21.9
16.4
10.9
7.3
5.5
Safety timer
(min.)
10
20
40
60
80
120
160
240
360
480
Display the Battery Charging Status
The AIC1783 provides an open-drained output, LED
pin, to indicate the battery charging status. The
outputs of LED pin are shown in the following table:
Power
ON
LED
1Hz
Fast
Charge
Fault
Charging Completed Conditions
4Hz
Flashing
ON
OFF
Charging Current Control
As shown in the typical application circuit, the
AIC1783 offers an open-drained output pin, ICON
Selecting Mode of Operation
The AIC1783 provides three modes of operation:
normal, test, and AC mode determined by the
setting of MODE pin. The AIC1783 will operate
normally when the MODE pin is left floating (a 0.1µF
capacitor is recommended to be tied to MODE pin if
the charge circuit works in a noisy environment).
When the MODE pin is biased to GND, the function
of -∆V detection is disabled. When the MODE pin is
biased to V
CC
,
the AIC1783 enters the test mode.
The test mode can be used to significantly reduce
production test time.
MODE pin
VCC
Floating
GND
Mode
Test
Function
Safety timer period scaled
down to 1/32
Normal Normal operation
AC
–∆V
detection disabled
pin, to control the charging current flow in fast
charge state and switch on to inhibit the charging
current flow in fault conditions. When fast charge is
completed, the AIC1783 enters the trickle charge
mode. In trickle charge mode, the ICON pin output
switches with 1/128 duty cycle.
Power
ON
ICON
ON
Fast
Charging
OFF
Charge
Completed
1/128
Duty cycle
Fault
Conditions
ON
10
AIC [ ANALOG INTERGRATIONS CORPORATION ]
