AIC1782
ABLE. 5 The Operating Mode of AIC1782
MODE pin Mode Function
800
600
400
200
0
VCC
Test
Safety timer period
scaled down to 1/32....
etc.
Floating
GND
Normal Normal operation
–
AC
∆V detection disabled
The Mode of LED Display and Trickle Charge
The AIC1782 provides two LED display modes
and five pulsed trickle charge modes. The
modes of LED display and trickle charge are
determined by the tri-level inputs, SEL1 and
SEL2 pins, as in the TABLE 6.
0
100
200
300
400
500
Safety Timer (min.)
Fig. 4 Safety Timer vs R
TMR
RTMR
(KΩ)
11
Osc.Freq.
(KHz)
262.4
131.2
65.6
Safety timer
(min.)
10
TABLE. 6 Mode of LED Display and Trickle
Charge
23
20
48
40
Trickle
LED
74
43.7
60
Charge
SEL1
SEL2
100
152
206
314
491
667
32.8
80
Display
Duty
Mode
21.9
120
160
240
360
480
16.4
VCC
Floating
GND
N/A
Type 1
Type 1
Type 1
Type 1
Type 1
Type 2
Type 2
Type 2
Type 2
10.9
VCC
1/32
1/64
1/128
1/256
N/A
1/32
1/64
1/128
7.3
5.5
VCC
Floating Floating
Selecting Mode of Operation
GND
VCC
Floating
GND
The AIC1782 provides three modes of opera-
tion: normal, test, and AC mode, determined by
the setting of MODE pin according to TABLE 5.
The AIC1782 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 VCC, the AIC1782
enters the test mode. The test mode can be
used to significantly reduce production test time.
For relevant informations please contact AIC di-
rectly.
GND
Displaying the Battery Charging Status
The AIC1782 provides four open-drained outputs,
in which LEA1 and LEA2 are used to indicate the
battery charging status of pack A, yet LEB1 and
LEB2 are used to indicate battery charging status
of pack B. Refer to the table of LED display mode
(TABLE 6), depending on the setting of SEL1 and
SEL2 pins, the outputs of LEA1, LEA2, LEB1, and
LEB2 pins are shown in the following table:
19
AIC [ ANALOG INTERGRATIONS CORPORATION ]
